Mimo related signaling in wireless communication

Abstract

Certain aspects of the present disclosure relate to techniques for multiple-input multiple-output (MIMO) related signaling in a wireless communication system. In an aspect, a method for wireless communication is provided which includes receiving a signal comprising a reference signal (RS). The RS is associated with a specific pseudo-noise (PN) sequence. The method further includes performing blind decoding of the RS using a plurality of PN sequences and determining, based on results of the blind decoding, a UE-specific RS pattern from a plurality of UE-specific RS patterns.

What is claimed is: 
     
         1 . A method for wireless communications, comprising:
 receiving, at a user equipment (UE), a signal comprising a reference signal (RS), wherein the RS is associated with a specific pseudo-noise (PN) sequence;   performing blind decoding of the RS using a plurality of PN sequences; and   determining, based on results of the blind decoding, a UE-specific RS pattern from a plurality of UE-specific RS patterns.   
     
     
         2 . The method of  claim 1 , further comprising:
 performing another blind decoding on the received signal using another plurality of PN sequences; and   determining, based on results of the other blind decoding, a number of layers spanned by the UE.   
     
     
         3 . An apparatus for wireless communications, comprising:
 means for receiving a signal comprising a reference signal (RS), wherein the RS is associated with a specific pseudo-noise (PN) sequence;   means for performing blind decoding of the RS using a plurality of PN sequences; and   means for determining, based on results of the blind decoding, a user-specific RS pattern from a plurality of user-specific RS patterns.   
     
     
         4 . The apparatus of  claim 3 , further comprising:
 means for performing another blind decoding on the received signal using another plurality of PN sequences; and   means for determining, based on results of the other blind decoding, a number of layers spanned by the apparatus.   
     
     
         5 . An apparatus for wireless communications, comprising:
 a receiver configured to receive a signal comprising a reference signal (RS), wherein the RS is associated with a specific pseudo-noise (PN) sequence;   a decoder configured to perform blind decoding of the RS using a plurality of PN sequences; and   a module configured to determine, based on results of the blind decoding, a user-specific RS pattern from a plurality of user-specific RS patterns.   
     
     
         6 . The apparatus of  claim 5 , wherein:
 the decoder is also configured to perform another blind decoding on the received signal using another plurality of PN sequences, and   the module is also configured to determine, based on results of the other blind decoding, a number of layers spanned by the apparatus.   
     
     
         7 . A non-transitory computer readable medium having instructions stored thereon, the instructions being executable by one or more processors and the instructions comprising:
 instructions for receiving, at a user equipment (UE), a signal comprising a reference signal (RS), wherein the RS is associated with a specific pseudo-noise (PN) sequence;   instructions for performing blind decoding of the RS using a plurality of PN sequences; and   instructions for determining, based on results of the blind decoding, a UE-specific RS pattern from a plurality of UE-specific RS patterns.   
     
     
         8 . The non-transitory computer readable medium of  claim 7 , wherein the instructions further comprise:
 instructions for performing another blind decoding on the received signal using another plurality of PN sequences; and   instructions for determining, based on results of the other blind decoding, a number of layers spanned by the UE.   
     
     
         9 . A method for wireless communications, comprising:
 generating a reference signal (RS) pattern, wherein the RS pattern comprises a pseudo-noise (PN) sequence specific for a rank of a user equipment (UE); and   transmitting the RS pattern to the UE.   
     
     
         10 . The method of  claim 9 , wherein:
 the RS pattern comprises one or more PN sequences, and   each of the PN sequences is associated with a different layer of the UE.   
     
     
         11 . An apparatus for wireless communications, comprising:
 means for generating a reference signal (RS) pattern, wherein the RS pattern comprises a pseudo-noise (PN) sequence specific for a rank of a user equipment (UE); and   means for transmitting the RS pattern to the UE.   
     
     
         12 . The apparatus of  claim 11 , wherein:
 the RS pattern comprises one or more PN sequences, and   each of the PN sequences is associated with a different layer of the UE.   
     
     
         13 . An apparatus for wireless communications, comprising:
 a module configured to generate a reference signal (RS) pattern, wherein the RS pattern comprises a pseudo-noise (PN) sequence specific for a rank of a user equipment (UE); and   a transmitter configured to transmit the RS pattern to the UE.   
     
     
         14 . The apparatus of  claim 13 , wherein:
 the RS pattern comprises one or more PN sequences, and   each of the PN sequences is associated with a different layer of the UE.   
     
     
         15 . A non-transitory computer readable medium having instructions stored thereon, the instructions being executable by one or more processors and the instructions comprising:
 instructions for generating a reference signal (RS) pattern, wherein the RS pattern comprises a pseudo-noise (PN) sequence specific for a rank of a user equipment (UE); and   instructions for transmitting the RS pattern to the UE.   
     
     
         16 . The non-transitory computer readable medium of  claim 15 , wherein:
 the RS pattern comprises one or more PN sequences, and   each of the PN sequences is associated with a different layer of the UE.