US2005135503A1PendingUtilityA1

System and method for adjusting a power level of a transmission signal

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Assignee: INTEL CORPPriority: Jul 2, 2002Filed: Dec 6, 2004Published: Jun 23, 2005
Est. expiryJul 2, 2022(expired)· nominal 20-yr term from priority
Inventors:Shilpa TalwarJose Tellado
H04L 27/3411H04L 27/2624H04W 52/52
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Claims

Abstract

The invention includes an apparatus and a method for adjusting a power level of a transmission signal for minimal distortion. The method includes modulating the transmission signal. The modulated transmission signal is processed to reduce a peak to average ratio of the modulated transmission signal based upon modulation parameters of the modulated transmission signal. The power level of the modulated transmission signal is adjusted according to the peak to average ratio of the modulated transmission signal. The transmission signal is amplified and transmitted.

Claims

exact text as granted — not AI-modified
1 . A method for adjusting a power level of a transmission signal for minimal distortion, comprising: 
 modulating the transmission signal;    processing the modulated transmission signal to reduce a peak to average ratio of the modulated transmission signal based upon modulation parameters of the modulated transmission signal;    adjusting the power level of the modulated transmission signal according to the peak to average ratio of the modulated transmission signal;    amplifying the transmission signal; and    transmitting the transmission signal.    
   
   
       2 . The method for adjusting the power level of a transmission signal of  claim 1 , wherein adjusting the power level of the modulated transmission signal is dependent upon the peak to average ratio of the modulated transmission signal.  
   
   
       3 . The method for adjusting the power level of a transmission signal of  claim 1 , wherein the processing the modulated transmission signal comprises windowing time samples of the modulation transmission signal.  
   
   
       4 . The method for adjusting the power level of a transmission signal of  claim 3 , wherein windowing time samples is dependent upon a bandwidth of the modulated transmission signal.  
   
   
       5 . The method for adjusting the power level of a transmission signal of  claim 3 , wherein windowing the time samples comprises centering the windowing dependent upon characteristics of the time samples.  
   
   
       6 . The method for adjusting the power level of a transmission signal of  claim 3 , wherein an amplitude of the windowing is dependent upon characteristics of the time samples.  
   
   
       7 . The method for adjusting the power level of a transmission signal of  claim 1 , wherein the modulation parameters comprise modulation rate.  
   
   
       8 . The method for adjusting the power level of a transmission signal of  claim 1 , wherein the modulation parameters comprise modulation order.  
   
   
       9 . The method for adjusting the power level of a transmission signal of  claim 1 , wherein adjusting the power level of the modulated transmission signal based upon modulation parameters is adaptive to changes in the modulation parameters of the modulated transmission signal.  
   
   
       10 . The method for adjusting the power level of a transmission signal of  claim 1 , wherein processing the modulated transmission signal to reduce a peak to average ratio of the modulated transmission signal is adaptive to changes in the modulation parameters of the modulated transmission signal.  
   
   
       11 . The method for adjusting the power level of a transmission signal of  claim 1 , wherein a transmission channel that the modulated transmission signal is transmitted through is adaptive.  
   
   
       12 . The method for adjusting the power level of a transmission signal of  claim 3 , wherein the windowing comprises at least one of Hamming, Hanning, Chebychev and Gaussian windows.  
   
   
       13 . The method for adjusting the power level of a transmission signal of  claim 3 , wherein the windowing comprises a window length that is determined through the use of a look-up-table (LUT).  
   
   
       14 . The method for adjusting the power level of a transmission signal of  claim 13 , wherein the look-up-table (LUT) provides a window length based upon a desired out-of-band distortion of the transmission signal.  
   
   
       15 . The method for adjusting the power level of a transmission signal of  claim 3 , wherein output PAR level is determined through the use of a look-up-table (LUT).  
   
   
       16 . The method for adjusting the power level of a transmission signal of  claim 15 , wherein the look-up-table (LUT) provides an output PAR level based upon a modulation order of the transmission signal.  
   
   
       17 . The method for adjusting the power level of a transmission signal of  claim 13 , wherein the look-up-table (LUT) provides an output PAR level based upon a modulation order and coding rate of the transmission signal.  
   
   
       18 . The method for adjusting the power level of a transmission signal of  claim 1 , further comprising: 
 linearizing a transmitter amplifier that amplifies the modulated transmission signal.    
   
   
       19 . The method for adjusting the power level of a transmission signal of  claim 17 , wherein linearizing a transmitter amplifier comprises: 
 pre-distorting the modulated transmission signal to pre-correct for non-linearities of the transmitter amplifier.    
   
   
       20 . The method for adjusting the power level of a transmission signal of  claim 17 , wherein the pre-distorting is adaptive to changes in non-linearities of the transmitter amplifier over time.  
   
   
       21 . The method for adjusting the power level of a transmission signal of  claim 1 , wherein the transmission signal includes signals from a plurality of transmission chains.  
   
   
       22 . A method for adjusting a power level of a transmission signal for minimal distortion, comprising: 
 modulating the transmission signal;    processing the modulated transmission signal to reduce a peak to average ratio of the modulated transmission signal based upon modulation parameters of the modulated transmission signal, wherein the processing the modulated transmission signal comprises windowing time samples of the modulation transmission signal.    adjusting the power level of the modulated transmission signal according to the peak to average ratio of the modulated transmission signal;    amplifying the transmission signal; and    transmitting the transmission signal.    
   
   
       23 . An apparatus for adjusting a power level of a transmission signal for minimal distortion, comprising: 
 means for modulating the transmission signal;    means for processing the modulated transmission signal to reduce a peak to average ratio of the modulated transmission signal based upon modulation parameters of the modulated transmission signal, wherein the processing the modulated transmission signal comprises windowing time samples of the modulation transmission signal.    means for adjusting the power level of the modulated transmission signal according to the peak to average ratio of the modulated transmission signal;    means for amplifying the transmission signal; and    means for transmitting the transmission signal.

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