Coding and Quantization Losses for the Coherent White Gaussian Channel.
Abstract
Communication of binary data over an additive white Gaussian channel by means of coded transmission over coherent phase-shift keyed modems is considered. It is found that for high rate codes and coarse receiver output quantization, the minimum value of (E sub b)/(N sub 0) required for reliable communication is significantly higher than the Shannon limit of -1.6 dB. for the raw channel. This loss of efficiency is investigated quantitatively as a function of code rate and coarseness of quantization, and shown to be negligible for low rate code with fine quantization. Similar results are presented showing the minimum (E sub b)/(N sub 0) ratio for operation in the region where a sequential decoder performs finite average computation. In connection with this, tables and curves are given which show the value of the Pareto parameter rho as a function of (E sub b)/(N sub 0). (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1972
- Accession Number
- AD0761465
Entities
People
- Boon J. Rit Nualprasert
Organizations
- Naval Postgraduate School