Patent ID: 8432990
Filing Date: 2013-04-30
Classification: H04B,H04L

Abstract:
1. A method for communications device operation, the method comprising: estimating a communications channel between the communications device and a controller serving the communications device, thereby producing a channel estimate; quantizing the channel estimate using a codebook, wherein the codebook comprises a plurality of first level codewords, and wherein each first level codeword has a plurality of subsidiary codewords, thereby producing a selected codeword; and transmitting an index corresponding to the selected codeword from the codebook to the controller, wherein quantizing the channel estimate using a codebook comprises: selecting a first level codeword from the plurality of first level codewords that maximizes |HW selecting a subsidiary codeword from the plurality of subsidiary codewords of the first level codeword that maximizes |HW selecting either the first level codeword or the subsidiary codeword based on which codeword maximizes |HW