Matching spectrally - zero code for incomplete response channels

摘要

A method is provided for encoding and decoding binary data, using a non-quasicatastrophic and phase invariant matched spectral null code for a partial response channel. The method is particularly suited for partial response systems wherein the order of the higher order null in the transfer function of the partial response channel is ≧1, resulting in signal-to-noise (SNR) gain at the channel output. In a preferred form, the method is used to develop a rate 3/10 Nyquist-null trellis code.