16-Kbps Modem Design Using
John Burt Foster, S.F. Harris · 1991
Vector Quantization (VQ) has traditionally been used as a source coding technique for digital coding systems. By reversing the order of the encoding and decoding process, VQ can be used as a binary input / analog output coder to transmit binary messages across analog channels. As compared to traditional modem schemes, VQ offers higher transmission rates for a fixed SNR or lower SNR's for a fixed transmission rate. The initial simulation efforts, written in F77, used the AWGN channel with low dimensions (1-8) and data rates of 1-3 bits/sample or equivalently 8,000 24,000 bi ts/second. The research strategy involves the following: