Interoperability between receivers and transmitters in a mobile station

Abstract

Techniques are disclosed for improving the interoperability of transmitters and receivers in a mobile station. Certain exemplary techniques involve performing filtering in a transmitter in response to a notification that a receiver is able to receive a reception frequency band. Other exemplary techniques involve changing one or more inputs of one or more devices in a receiver in response to a transmission by a transmitter. Still other exemplary techniques are disclosed.

1 . A mobile station comprising: 
 a first antenna;    at least one second antenna;    a receiver coupled to the first antenna, the receiver comprising first control logic adapted to generate a notification of the receiver being able to receive a reception frequency band,    a transmitter coupled to the at least one second antenna and the receiver, the transmitter communicating radio frequency (RF) signals in a selected one of at least one transmission frequency bands over an RF transmit path to the at least one second antenna, the transmitter comprising: 
 second control logic;  
 at least one filter; and  
 at least one switch coupled to the RF transmit path, the at least one filter, and the control logic, the at least one switch adapted to modify the RF transmit path to couple a given one of the at least one filters to or decouple the given filter from the RF transmit path,  
 wherein the second control logic is responsive to the notification to cause the at least one switch to modify the RF transmit path to couple the given filter to the RF transmit path.  
   
   
   
       2 . The mobile station of  claim 1 , further comprising a display device coupled to the receiver and adapted to display at least information received from the receiver.  
   
   
       3 . The mobile station of  claim 1 , wherein: 
 the first control circuitry is responsive to the notification to generate at least one control signal; and    the at least one switch is coupled to the at least one control signal and is responsive to the at least one control signal to modify the RF transmit path to couple the given filter to or decouple the given filter from the RF transmit path.    
   
   
       4 . The mobile station of  claim 3 , wherein: 
 the at least one switch comprises a first switch, the first switch coupled to an antenna coupling in the RF transmit path and intermediate the antenna coupling and the at least one filter, the first switch responsive to one of the at least one control signals to couple the at least one filter to or decouple the at least one filter from the antenna coupling.    
   
   
       5 . The mobile station of  claim 4 , wherein: 
 the at least one control signal comprises first and second control signals;    the at least one filter comprises two filters;    the at least one switch comprises a second switch coupled to and intermediate the first switch and the two filters, the second switch responsive to the second control signal to couple one of the two filters to an output of the second switch; and    the first switch is responsive to the first control signal to couple the output of the second switch to or decouple the output of the second switch from the antenna coupling.    
   
   
       6 . The mobile station of  claim 5 , wherein: 
 the at least one transmission frequency band comprises first and second transmission frequency bands;    the two filters comprise first and second filters, the first filter corresponding to the first transmission frequency band and the second filter corresponding to the second transmission frequency band;    the control logic is responsive to the transmitter being in a transmission mode to cause, by using the first control signal, the first switch to couple the output of the second switch to the antenna coupling; and    the control logic is responsive to which of the first and second transmission frequency bands is to be used for transmission to cause, by using the second control signal, the second switch to couple the first filter to the output of the second switch when the first transmission frequency band is to be used for transmission and to couple the second filter to the output of the second switch when the second transmission frequency band is to be used for transmission.    
   
   
       7 . The mobile station of  claim 1 , wherein: 
 the at least one transmission frequency band comprises first and second transmission frequency bands;    the at least one filter comprises first and second filters, the first filter corresponding to the first transmission frequency band and the second filter corresponding to the second transmission frequency band; and    the control logic is responsive to which of the first and second transmission frequency bands is to be used for transmission to cause the at least one switch to couple the first filter to the RF transmit path when the first transmission frequency band is to be used for transmission and to couple the second filter to the RF transmit path when the second transmission frequency band is to be used for transmission.    
   
   
       8 . The mobile station of  claim 7 , wherein the at least one switch comprises a single switch, the single switch comprising three positions and an output, a first position coupling the first filter to the output, a second position coupling the second filter to the output, and a third position coupling a not connected terminal to the output.  
   
   
       9 . The mobile station of  claim 7 , wherein: 
 the second control logic is adapted to generate first and second control signals;    the at least one switch comprises first and second switches;    the first switch is coupled to the first filter and is responsive to the first control signal to couple the first filter to the RF transmit path; and    the second switch is coupled to the second filter and is responsive to the second control signal to couple the second filter to the RF transmit path.    
   
   
       10 . The mobile station of  claim 7 , wherein: 
 the transmitter comprises a power amplifier;    the at least one switch comprises first and second switches, each of the first and second switches having a single terminal and first, second, and third terminals;    the single terminal of the first switch is coupled to the power amplifier;    the first terminal of the first switch is coupled to an input of the first filter, and the output of the first filter is coupled to the first terminal of the second switch;    the second terminal of the first switch is coupled to the second terminal of the second switch;    the third terminal of the first switch is coupled to an input of the second filter, and an output of the second filter is coupled to the third terminal of the second switch; and    the single terminal of the second switch is coupled to the at least one second antenna    
   
   
       11 . The mobile station of  claim 7 , wherein: 
 the at least one second antenna comprises two given antennas;    the transmitter comprises a power amplifier;    the at least one switch comprises first and second switches, the first switch having a single terminal and first, second, and third terminals, the second switch having a single terminal and first and second terminals;    the single terminal of the first switch is coupled to the power amplifier;    the first terminal of the first switch is coupled to an input of the first filter, and the output of the first filter is coupled to the first terminal of the second switch;    the second terminal of the first switch is coupled to the second terminal of the second switch;    the third terminal of the first switch is coupled to an input of the second filter, and an output of the second filter is coupled to one of the given antennas; and    the single terminal of the second switch is coupled to the other of the given antennas.    
   
   
       12 . The mobile station of  claim 7 , wherein: 
 the at least one second antenna comprises three given antennas;    the transmitter comprises a power amplifier;    the at least one switch comprises a given switch having a single terminal and first, second, and third terminals;    the single terminal of the given switch is coupled to the power amplifier;    the first terminal of the given switch is coupled to an input of the first filter, and the output of the first filter is coupled to a first of the given antennas;    the second terminal of the given switch is coupled to a second of the given antennas; and    the third terminal of the first switch is coupled to an input of the second filter, and an output of the second filter is coupled to a third of the given antennas.    
   
   
       13 . The mobile station of  claim 1 , wherein: 
 the transmitter further comprises at least one radio frequency (RF) device adapted to create the RF signals in the selected one of the at least one transmission frequency bands; and    the RF transmit path comprises a path from the at least one RF device to the at least one second antenna.    
   
   
       14 . The mobile station of  claim 13 , wherein the second control logic is part of the at least one switch.  
   
   
       15 . The mobile station of  claim 13 , wherein the second control logic is part of the at least one RF device and is adapted to cause the at least one RF device to communicate information through the RF transmit path to the at least one second antenna.  
   
   
       16 . The mobile station of  claim 13 , wherein: 
 the transmitter further comprises first and second buses from the at least one RF device to the at least one switch;    the at least one RF device is further adapted to create and communicate first RF signals defined by a first communication protocol over the first bus and second RF signals defined by a second communication protocol over the second bus, the first RF signals defined by the first communication protocol being the RF signals in a selected one of the at least one transmission frequency bands;    the transmitter further comprises first and second power amplifiers and at least one duplex filter, each of the first and second power amplifiers coupled to the at least one second antenna, the second power amplifier coupled to the at least one second antenna through the at least one duplex filter;    the at least one switch is coupled to the first and second buses and is intermediate the at least one RF device and the at least one duplex filter, the at least one switch adapted to couple the first bus to the second power amplifier, thereby coupling the at least one duplex filter to the RF transmit path for the first RF signals, and to couple the first bus to the first power amplifier and the second bus to the second power amplifier, thereby decoupling the duplex filter from the RF transmit path for the first RF signals.    
   
   
       17 . The mobile station of  claim 16 , wherein the at least one switch comprises first and second switches, the first switch having inputs coupled to the first and second buses and an output coupled to an input of the second switch, the second switch having a first output coupled to the first power amplifier and a second output coupled to the second power amplifier.  
   
   
       18 . The mobile station of  claim 16 , wherein: 
 the control logic is adapted to create two control signals; and    the at least one switch is responsive to the two control signals to couple the first bus to the second power amplifier when the two control signals are in a first state, to couple the first bus to the first power amplifier when the two control signals are in a second state, and to couple the second bus to the second power amplifier when the two control signals are in a third state.    
   
   
       19 . The mobile station of  claim 16 , wherein: 
 the first communication protocol is a global system for mobile communications (GSM) protocol; and    the second communication protocol is a code division multiple access (CDMA) protocol.    
   
   
       20 . The mobile station of  claim 16 , wherein: 
 the at least one transmission frequency band is defined by the first protocol to comprise first and second transmission frequency bands;    the second protocol defines RF signals using the first and second transmission frequency bands;    the at least one duplex filter comprises a first duplex filter corresponding to the first transmission frequency band and a second filter corresponding to the second transmission frequency band; and    the second power amplifier is adapted to route the first transmission frequency band to the first duplex filter and the second transmission frequency band to the second duplex filter.    
   
   
       21 . The mobile station of  claim 16 , wherein: 
 the at least one second antenna comprises two given antennas, wherein one given antenna is coupled to the first power amplifier, and the other given antenna is coupled to the at least one duplex filter.    
   
   
       22 . The mobile station of  claim 16 , wherein: 
 the at least one second antenna comprises a single antenna coupled to both the first and second power amplifiers.    
   
   
       23 . The mobile station of  claim 1 , wherein: 
 the at least one transmission frequency band comprises one or more of an 824 to 849 megahertz (MHz) frequency band and an 1850 to 1910 MHz frequency band; and    the reception frequency band comprises a 1670 to 1675 MHz frequency band.    
   
   
       24 . The mobile station of  claim 1 , wherein: 
 the at least one transmission frequency band comprises a 824 to 849 megahertz (MHz) frequency band and a 1850 to 1910 MHz frequency band;    the reception frequency band comprises a 1670 to 1675 MHz frequency band;    the at least one filter comprises a first filter to filter at least one harmonic caused by transmitting the 824 to 849 MHz frequency band and a second filter to filter wideband noise caused by transmitting the 1850 to 1910 MHZ frequency band.    
   
   
       25 . The mobile station of  claim 1 , wherein: 
 the at least one transmission frequency band comprises one or more of a 880 to 915 megahertz (MHz) frequency band, a 1710 to 1785 MHz frequency band, and a 1920 to 1980 MHz frequency band; and    the reception frequency band comprises a 470 to 702 MHz frequency band.    
   
   
       26 . The mobile station of  claim 1 , wherein: 
 the at least one transmission frequency band comprises one or more of a 824 to 849 megahertz (MHz) frequency band and a 1850 to 1910 MHz frequency band; and    the reception frequency band comprises a 1670 to 1675 MHz frequency band.    
   
   
       27 . The mobile station of  claim 1 , wherein: 
 the at least one transmission frequency band comprises at least one transmission frequency band defined by a global system for mobile communications (GSM) standard; and    the reception frequency band comprises a reception frequency band defined by a digital video broadcasting handheld (DVB-H) standard.    
   
   
       28 . The mobile station of  claim 1 , wherein: 
 the at least one transmission frequency band comprises at least one transmission frequency band defined by a code division multiple access (CDMA) standard; and    the reception frequency band comprises a reception frequency band defined by a digital video broadcasting handheld (DVB-H) standard.    
   
   
       29 . The mobile station of  claim 1 , wherein: 
 the at least one transmission frequency band comprises at least one transmission frequency band defined by a wideband code division multiple access (WCDMA) standard; and    the reception frequency band comprises a reception frequency band defined by a digital video broadcasting handheld (DVB-H) standard.    
   
   
       30 . The mobile station of  claim 1 , wherein: 
 the at least one transmission frequency band comprises at least one transmission frequency band defined by a CDMAOne or CDMA2000 standard; and    the reception frequency band comprises a reception frequency band defined by a digital video broadcasting handheld (DVB-H) standard.    
   
   
       31 . The mobile station of  claim 1 , wherein the transmitter further comprises a front end module (FEM), in the RF transmit path, comprising a power amplifier, and wherein the control logic is further responsive to the notification to adjust biasing of the power amplifier.  
   
   
       32 . The mobile station of  claim 1 , wherein the first control logic is adapted to generate a notification of the receiver being able to receive a reception frequency band when one or more of the following is true: the receiver is coupled to the transmitter; the receiver is in a reception mode; and the receiver is receiving information in the reception frequency band.  
   
   
       33 . In a mobile station comprising a first antenna and at least one second antenna, a method for operating a transmitter coupled to the at least one second antenna in combination with a receiver coupled to the first antenna, comprising: 
 generating a notification of the receiver being able to receive a reception frequency band from the first antenna;    modifying, in response to the notification, a radio frequency (RF) transmit path to couple a given one of at least one filters to or decouple the given filter from the RF transmit path; and    transmitting information in a selected one of at least one transmission frequency bands and through the modified RF transmit path to the at least one second antenna.    
   
   
       34 . A signal bearing medium comprising a program of machine-readable instructions executable by an apparatus to perform operations for operating a transmitter coupled to at least one second antenna in combination with a receiver coupled to a first antenna, the operations comprising the steps of: 
 generating a notification of the receiver being able to receive a reception frequency band from the first antenna;    modifying, in response to the notification, a radio frequency (RF) transmit path to couple a given one of at least one filters to or decouple the given filter from the RF transmit path; and    transmitting information in a selected one of at least one transmission frequency bands and through the modified RF transmit path to the at least one second antenna.    
   
   
       35 . A mobile station comprising: 
 a first antenna;    a second antenna;    a transmitter coupled to the first antenna, the transmitter comprising first control logic adapted to generate a notification of a transmission to the first antenna, the transmission using a selected one of at least one transmission frequency bands; and    a receiver coupled to the second antenna and to the transmitter, the receiver comprising second control logic and a plurality of devices, the second control logic adapted to control the plurality of devices to receive information in a reception frequency band from the second antenna, the second control logic responsive to the notification to modify at least one input used by at least a given one of the devices, the second control logic further adapted to control the at least one given device and the rest of the plurality of devices to receive given information, the reception of the given information occurring for at least some time period while the transmitter transmits in the at least one transmission frequency band.    
   
   
       36 . The mobile station of  claim 35 , further comprising a display device coupled to the receiver and adapted to display at least the given information.  
   
   
       37 . The mobile station of  claim 35 , wherein: 
 the plurality of devices comprise a low noise amplifier (LNA);    the at least one input to the LNA comprises biasing current;    the second control logic is responsive to the notification to increase the biasing current from an initial current to a final current.    
   
   
       38 . The mobile station of  claim 35 , wherein: 
 the plurality of devices comprise a mixer;    the at least one input to the mixer comprises biasing current; and    the second control logic is responsive to the notification to increase the biasing current from an initial current to a final current.    
   
   
       39 . The mobile station of  claim 35 , wherein: 
 the plurality of devices comprise a base band filter;    the at least one input to the base band filter comprises one or more of first values defining a corner frequency of the base band filter and second values defining an order of the base band filter; and    the second control logic is responsive to the notification to modify one or more of the first and second values to reduce bandwidth of the base band filter from an initial bandwidth to a final bandwidth.    
   
   
       40 . The mobile station of  claim 35 , wherein: 
 the at least one transmission frequency band comprises first and second transmission frequency bands;    the first control logic is adapted to determine a signal indicating which of first and second transmission frequency bands is being transmitted;    the second control logic is further responsive to the signal to modify the one or more of the first and second values when the second transmission frequency band is being transmitted but not when the first transmission frequency band is being transmitted.    
   
   
       41 . The mobile station of  claim 40 , wherein: 
 the first transmission frequency band comprises a 824 to 849 megahertz (MHz) frequency band;    the second transmission frequency band comprises a 1850 to 1910 MHz frequency band; and    the reception frequency band comprises a 1670 to 1675 MHz frequency band.    
   
   
       42 . The mobile station of  claim 40 , wherein: 
 the at least one transmission frequency band comprises one or more of a 880 to 915 megahertz (MHz) frequency band, a 1710 to 1785 MHz frequency band, and a 1920 to 1980 MHz frequency band; and    the reception frequency band comprises a 470 to 702 MHz frequency band.    
   
   
       43 . The mobile station of  claim 35 , wherein: 
 the plurality of devices comprise a signal processing module;    the at least one input to the signal processing module comprises a given input defining whether or not corrupted sub-carriers of the information should be removed; and    the second control logic is responsive to the notification to modify the given input to a predetermined state so that corrupted sub-carriers of the information are removed.    
   
   
       44 . The mobile station of  claim 43 , wherein the signal processing module is adapted to remove sub-carriers by ignoring the sub-carrier information.  
   
   
       45 . The mobile station of  claim 43 , wherein the signal processing module is adapted to remove sub-carriers by ignoring sub-carrier information from given sub-carriers that are expected to be corrupted and by using previous information from the given sub-carriers.  
   
   
       46 . The mobile station of  claim 35 , wherein: 
 the at least one transmission frequency band comprises first and second transmission frequency bands;    the first control logic is adapted to determine a signal indicating which of the first and second transmission frequency bands is being transmitted; and    the second control logic is further responsive to the signal to modify the given input to the predetermined state when the first transmission frequency band is being transmitted but not when the second transmission frequency band is being transmitted.    
   
   
       47 . The mobile station of  claim 46 , wherein: 
 the first transmission frequency band comprises a 824 to 849 megahertz (MHz) frequency band;    the second transmission frequency band comprises a 1850 to 1910 MHz frequency band; and    the reception frequency band comprises a 1670 to 1675 MHz frequency band.    
   
   
       48 . The mobile station of  claim 46 , wherein: 
 the at least one transmission frequency band comprises one or more of a 880 to 915 megahertz (MHz) frequency band, a 1710 to 1785 MHz frequency band, and a 1920 to 1980 MHz frequency band; and    the reception frequency band comprises a 470 to 702 MHz frequency band.    
   
   
       49 . The mobile station of  claim 35 , wherein: 
 the plurality of devices comprise an automatic gain control (AGC) module;    the at least one input to the AGC module comprises a given input, the AGC module responsive to a predetermined state of the given input to determine and use a value defining actual amplification of a variable amplifier in the AGC module; and    the second control logic is responsive to the notification to modify the given input to a predetermined state so that the ACG module determines and uses the value.    
   
   
       50 . The mobile station of  claim 35 , wherein: 
 the plurality of devices comprise an automatic gain control (AGC) module;    the at least one input to the AGC module comprises a plurality of values defining a signal strength measurement bandwidth of the AGC module; and    the second control logic is responsive to the notification to modify the plurality of values to decrease bandwidth of the AGC from an initial bandwidth to a final bandwidth.    
   
   
       51 . The mobile station of  claim 35 , wherein: 
 the at least one transmission frequency band comprises one or more of a 824 to 849 megahertz (MHz) frequency band and a 1850 to 1910 MHz frequency band; and    the reception frequency band comprises a 1670 to 1675 MHz frequency band.    
   
   
       52 . The mobile station of  claim 35 , wherein: 
 the at least one transmission frequency band comprises one or more of a 880 to 915 megahertz (MHz) frequency band, a 1710 to 1785 MHz frequency band, and a 1920 to 1980 MHz frequency band; and    the reception frequency band comprises a 470 to 702 MHz frequency band.    
   
   
       53 . The mobile station of  claim 35 , wherein: 
 the at least one transmission frequency band comprises one or more of a 824 to 849 megahertz (MHz) frequency band and a 1850 to 1910 MHz frequency band; and    the reception frequency band comprises a 470 to 702 MHz frequency band.    
   
   
       54 . The mobile station of  claim 35 , wherein: 
 the at least one transmission frequency band comprises at least one frequency band defined by a global system for mobile communications (GSM) standard; and    the reception frequency band comprises a frequency band defined by a digital video broadcasting handheld (DVB-H) standard.    
   
   
       55 . The mobile station of  claim 35 , wherein: 
 the at least one transmission frequency band comprises at least one transmission frequency band defined by a code division multiple access (CDMA) standard; and    the reception frequency band comprises a reception frequency band defined by a digital video broadcasting handheld (DVB-H) standard.    
   
   
       56 . The mobile station of  claim 35 , wherein: 
 the at least one transmission frequency band comprises at least one transmission frequency band defined by a wideband code division multiple access (WCDMA) standard; and    the reception frequency band comprises a reception frequency band defined by a digital video broadcasting handheld (DVB-H) standard.    
   
   
       57 . The mobile station of  claim 35 , wherein: 
 the at least one transmission frequency band comprises at least one transmission frequency band defined by a CDMAOne or CDMA2000 standard; and    the reception frequency band comprises a reception frequency band defined by a digital video broadcasting handheld (DVB-H) standard.    
   
   
       58 . In a mobile station comprising a first antenna and a second antenna, a method for operating a transmitter coupled to the first antenna in combination with a receiver coupled to the second antenna, comprising: 
 generating a notification of a transmission to the first antenna, the transmission using a selected one of at least one transmission frequency bands; and    modifying, in response to the notification, at least one input used by at least a given one of a plurality of devices in the receiver; and    receiving, using the at least one given device and the rest of the plurality of devices, information in a second frequency band from the second antenna, the reception occurring for at least some time period while the transmitter transmits in the at least one transmission frequency band.    
   
   
       59 . A signal bearing medium comprising a program of machine-readable instructions executable by an apparatus to perform operations for operating a transmitter coupled to a first antenna in combination with a receiver coupled to a second antenna, the operations comprising the steps of: 
 generating a notification of a transmission to the first antenna, the transmission using a selected one of at least one transmission frequency bands; and    modifying, in response to the notification, at least one input used by at least a given one of a plurality of devices in the receiver; and    receiving, using the at least one given device and the rest of the plurality of devices, information in a second frequency band from the second antenna, the reception occurring for at least some time period while the transmitter transmits in the at least one transmission frequency band