Transmitting constellation symbols in a communication system

Abstract

A method is provided for transmitting constellation symbols in a communication system. A set of orthogonal time-frequency mapping patterns (TFPs) is generated from a TFP. And a TFP from the set of orthogonal TFPs is selected for transmitting a block of constellation symbols.

1 . A method of transmitting constellation symbols in a communication system, comprising:
 obtaining, by a user equipment (UE), a first time-frequency mapping pattern (TFP), wherein the first TFP is selected from a set of orthogonal TFPs,   the set of orthogonal TFPs is generated by:
 cyclically shifting a second TFP in frequency domain, and 
 cyclically shifting the second TFP in time domain; and 
   transmitting, by the UE, a block of constellation symbols in accordance with the first TFP.   
     
     
         2 . The method of  claim 1 , wherein the first TFP is a sequence of indices of sub-bands used for transmission within a transmission time interval (TTI). 
     
     
         3 . The method of  claim 2 , wherein the TTI comprising at least one time slot. 
     
     
         4 . The method of  claim 2 , wherein each of the sub-bands comprises a number of subcarriers. 
     
     
         5 . The method of  claim 1 , wherein the first TFP is configured to map the block of constellation symbols onto a time-frequency grid within a TTI. 
     
     
         6 . The method of  claim 5 , wherein the block of constellation symbols is grouped into at least one orthogonal frequency-division multiplexing (OFDM) symbol. 
     
     
         7 . The method of  claim 5 , wherein the TTI comprises a number of OFDM symbol intervals. 
     
     
         8 . The method of  claim 7 , wherein each of the number of OFDM symbol intervals is configured to transmit a plurality of constellation symbols. 
     
     
         9 . The method of  claim 5 , wherein the time-frequency grid is represented by a dimension of time slot and a dimension of sub-band. 
     
     
         10 . The method of  claim 1 , wherein the first TFP is randomly selected from the set of orthogonal TFPs. 
     
     
         11 . A user equipment in a communication system, comprising a transceiver and a processor, wherein the processor is configured to:
 obtain a first time-frequency mapping pattern (TFP), wherein the first TFP is selected from a set of orthogonal TFPs, the set of orthogonal TFPs is generated by:
 cyclically shifting a second TFP in frequency domain, and 
 cyclically shifting the second TFP in time domain; and 
   transmit a block of constellation symbols in accordance with the first TFP.   
     
     
         12 . The user equipment of  claim 11 , wherein the first TFP is a sequence of indices of sub-bands used for transmission within a transmission time interval (TTI). 
     
     
         13 . The user equipment of  claim 12 , wherein the TTI comprising at least one time slot. 
     
     
         14 . The user equipment of  claim 12 , wherein each of the sub-bands comprises a number of subcarriers. 
     
     
         15 . The user equipment of  claim 11 , wherein the first TFP is used to map the block of constellation symbols onto a time-frequency grid within a TTI. 
     
     
         16 . The user equipment of  claim 15 , wherein the block of constellation symbols is grouped into at least one orthogonal frequency-division multiplexing (OFDM) symbol. 
     
     
         17 . The user equipment of  claim 15 , wherein the TTI comprises a number of OFDM symbol intervals. 
     
     
         18 . The user equipment of  claim 17 , wherein each of the number of OFDM symbol intervals is configured to transmit a plurality of constellation symbols. 
     
     
         19 . The user equipment of  claim 15 , wherein the time-frequency grid is represented by a dimension of time slot and a dimension of sub-band. 
     
     
         20 . The user equipment of  claim 11 , wherein the first TFP is randomly selected from the set of orthogonal TFPs. 
     
     
         21 . A method of transmitting constellation symbols to a base station (BS) in a communication system, comprising:
 obtaining, by a user equipment (UE), communication resources allocated by the BS;   obtaining, by the UE, a first time-frequency mapping pattern (TFP), wherein the first TFP is selected from a set of orthogonal TFPs, the set of orthogonal TFPs is generated by:
 cyclically shifting a second TFP in frequency domain, and 
 cyclically shifting the second TFP in time domain; and 
   transmitting, by the UE, a block of constellation symbols to the BS on the communication resources in accordance with the first TFP.