Design of channeloptimized vector quantizers in the presence of channel mismatch.pdfVIP

DESIGN OF CHANNEL OPTIMIZED VECTOR QUANTIZERS IN THE PRESENCE OF CHANNEL MISMATCH Nariman Farvardin Hamid Jafarkhani Department of Electrical Engineering and ATT Labs - Research Institute for Systems Research Red Bank, NJ University of Maryland, College Park, MD email: hamidresearchattcom email: farvarisrumdedu ABSTRACT state of the channel) and apply the COVQ design procedure to a hypothetical BSC with the calculated BER. The rational We propose algorithms to design channel-optimized vector behind this approach is that given a modulation scheme, e.g. quantizers in the presence of channel mismatch. We con- uncoded binary phase-shift keying (BPSK), and received sider two cases: (i) no information about the statistics of channel signal-to-noise ratio (CSNR), the channel behaves the channel bit error rate is available and (ii) the probabil ity like a BSC. So, the BSC model is valid at each time and it density function of the channel bit error rate is known. We is reasonable to assume that the BSC model works for the al