Patent ID: 8665930

Claim:
A method for user equipment (UE) operation in a wireless communication system, the wireless communication system having a base station, the method comprising: Measuring a channel between said UE and the base station; Determining by said UE a quantized estimate of said measured channel by using a codebook to approximate said measured channel; Computing an error measure for the quantized estimate said error measure being an error vector corresponding to a difference between said quantized estimate and said measured channel; Projecting said measured channel onto a set of orthogonal basis-vectors wherein one dimension of said basis vectors of formed of at least said quantized estimate including basis information, while said error measure includes said projections onto remaining dimension of said basis vectors; and Transmitting the error measure and the basis information for the quantized estimate to the base station for use by the base station in reconstructing an actual channel vector, said transmitting said error measure including prior to transmitting, representing a real component and an imaginary component of said error measure in binary format and initially transmitting sign bits followed by most significant bits of each said real component and said imaginary component.