Kerdock Codes for Limited Feedback Precoded MIMO Systems
A codebook based limited feedback strategy is a practical way to obtain partial channel state information at the transmitter in a precoded Multiple-Input Multiple-Output (MIMO) wireless system. Conventional codebook designs use Grassmannian packing, equiangular frames, vector quantization, or Fourier based constructions. While the capacity and error rate performance of conventional codebook constructions have been extensively investigated, constructing these codebooks is notoriously difficult relying on techniques such as nonlinear search or iterative algorithms. Further, the resulting codebooks may not have a systematic structure to facilitate storage of the codebook and low search complexity.