TRANSMISSION OF VECTOR QUANTIZED DATA OVER A NOISY CHANNEL

In the transmission of vector quantized data, the vector quantizer and the communication system are usually designed separately. With such a n approach, the channel noise results in significant degradations in t he performance of the vector quantizer, To solve this problem, we shou ld properly create the mapping from the codebook of the quantizer to t he channel signal set of the communication system. This paper proposes a new approach to construct such a mapping based on the ordering prop erty of the self-organizing feature map (SOFM), We use the neighborhoo d structure of the SOFM and the neighborhood structure of the channel signal set to construct the mapping, Simulation results confirm that t he proposed approach is robust with respect to channel noise.