Accession Number : ADA185667

Title :   Coding for Spread-Spectrum Communications Networks.

Descriptive Note : Technical rept.,

Corporate Author : MICHIGAN UNIV ANN ARBOR COMMUNICATIONS AND SIGNAL PROCESSING LAB

Personal Author(s) : Kim, Bal G

PDF Url : ADA185667

Report Date : Mar 1987

Pagination or Media Count : 159

Abstract : The multiple-access capability of a frequency-hop packet radio network is investigated from a coding point of view. The achievable region of code rate and channel traffic and the normalized throughput are considered as performance measures. We model the communication system from the modulator input to the demodulator output as an I-user interference channel, and evaluate the asymptotic performance fo various coding schemes for channels with perfect side information, no side information, and imperfect side information. The coding schemes being considered are Reed-Solomon codes, concatenated codes, and parallel decoding schemes. We derive the optimal code rate and the optimal channel traffic at which the normalized throughput is maximized, and from these optimum values the asymptotic maximum normalized throughput is derived. The results are then compared with channel capacities.

Descriptors :   *CHANNELS, *CODING, *COMMUNICATION AND RADIO SYSTEMS, *COMMUNICATIONS NETWORKS, *MULTIPLE ACCESS, *RADIO EQUIPMENT, *SPREAD SPECTRUM, DATA LINKS, DECODING, DEMODULATORS, FREQUENCY AGILITY, INPUT, MACHINE CODING, MODULATORS, NETWORKS, OPTIMIZATION, OUTPUT, PACKETS, PARALLEL ORIENTATION, RATES, TRAFFIC

Subject Categories : Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE