Predictive vector quantization for wireless transmitter adaptation with limited feedback

In this paper we study distributed transmitter adaptation with limited feedback where a B-bit codebook known at both transmitter and receiver is used in the update process. Specifically, we discuss predictive vector quantization (PVQ) where the transmitter is updated incrementally using the codebook element which results in smallest distortion in sum capacity from among the available 2^B codebook entries. The performance of the proposed PVQ method is compared with that of random vector quantization (RVQ) with numerical results obtained from simulations.