Codebook generation system and associated methods

Abstract

A codebook generation system and associated methods are generally described herein.

What is claimed is: 
     
         1 . An apparatus, comprising:
 a processor circuit arranged to select a precoding matrix based on an index received from a remote device over a communication channel of a closed-loop multiple-input and multiple-output (MIMO) orthogonal frequency-division multiple access (OFDMA) system, the precoding matrix constructed by applying a transform to one or more vectors, and precode information with the precoding matrix for transmission over multiple transmitter antennae.   
     
     
         2 . The apparatus of  claim 1 , the processor circuit arranged to select a vector from a codebook, and apply a transform to the selected vector to form the precoding matrix. 
     
     
         3 . The apparatus of  claim 1 , the processor circuit arranged to apply a Householder reflection transform to a vector to form a matrix of multiple columns. 
     
     
         4 . The apparatus of  claim 1 , the processor circuit arranged to apply a transform to a vector to form an N×N matrix. 
     
     
         5 . The apparatus of  claim 1 , the processor circuit arranged to apply a transform to a vector to form a 4×4 matrix. 
     
     
         6 . The apparatus of  claim 1 , the processor circuit arranged to select a subset of columns from a matrix of multiple columns as the precoding matrix. 
     
     
         7 . The apparatus of  claim 1 , comprising:
 a memory communicatively coupled to the processor circuit, the memory to store the one or more vectors; and   a physical layer (PHY) communicatively coupled to the processor circuit and the multiple transmitter antennae to interact with the remote device.   
     
     
         8 . A device, comprising:
 a receiver arranged to receive an index for a precoding matrix over a communication channel of a closed-loop multiple-input and multiple-output (MIMO) orthogonal frequency-division multiple access (OFDMA) system; and   a processor circuit communicatively coupled to the receiver, the processor circuit arranged to select a precoding matrix based on the received index, the precoding matrix constructed by applying a transform to one or more vectors, and precode information with the precoding matrix; and   a radio frequency (RF) transmitter communicatively coupled to the processor circuit, the RF transmitter arranged to transmit electromagnetic representations of the precoded information over multiple transmitter antennae.   
     
     
         9 . The device of  claim 8 , the processor circuit arranged to select a vector from a codebook, and apply a transform to the selected vector to form the precoding matrix. 
     
     
         10 . The device of  claim 8 , the processor circuit arranged to apply a Householder reflection transform to a vector to form a matrix of multiple columns. 
     
     
         11 . The device of  claim 8 , the processor circuit arranged to apply a transform to a vector to form an N×N matrix. 
     
     
         12 . The device of  claim 8 , the processor circuit arranged to apply a transform to a vector to form a 4×4 matrix. 
     
     
         13 . The device of  claim 8 , the processor circuit arranged to select a subset of columns from a matrix of multiple columns as the precoding matrix for the RF transmitter. 
     
     
         14 . The device of  claim 8 , wherein the RF transmitter utilizes two transmitter antennae (N t ). 
     
     
         15 . The device of  claim 8 , wherein the RF transmitter utilizes four transmitter antennae (N t ). 
     
     
         16 . A communications device, comprising:
 a storage medium comprising content; and   a processor circuit, communicatively coupled with the storage medium, to select a precoding matrix based on an index received from a remote device over a communication channel of a closed-loop multiple-input and multiple-output (MIMO) orthogonal frequency-division multiple access (OFDMA) system, the precoding matrix constructed by applying a transform to one or more vectors, and precode information with the precoding matrix for transmission over multiple transmitter antennae.   
     
     
         17 . The communications device of  claim 16 , the processor circuit arranged to select a vector from a codebook, and apply a transform to the selected vector to form the precoding matrix. 
     
     
         18 . The communications device of  claim 16 , the processor circuit arranged to apply a Householder reflection transform to a vector to form a matrix of multiple columns. 
     
     
         19 . The communications device of  claim 16 , the processor circuit arranged to select a subset of columns from a matrix of multiple columns as the precoding matrix. 
     
     
         20 . The communications device of  claim 16 , comprising a radio frequency (RF) transmitter communicatively coupled to the processor circuit, the RF transmitter arranged to transmit electromagnetic representations of the precoded information over the multiple transmitter antennae, wherein the RF transmitter utilizes an even number of transmitter antennae (N t ).