PERFORMANCE OF A FREQUENCY HOPPED SPREAD SPECTRUM MULTIPLE ACCESS PACKET RADIO
Date
1992-06
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
ORCID
Type
Degree Level
Masters
Abstract
Spread Spectrum (SS) modulation has become an increasingly popular technique in communication systems over the years. This modulation provides multipath and jamming interference rejection. It also inherently ensures privacy and secrecy in communication systems. An important issue in a spread spectrum communication system is the number of simultaneous users that can share a common bandwidth.
One type of spread spectrum which is suitable for multiple access packet radio is Frequency Hopped (FH) spread spectrum. Such systems require error correction coding to keep the co-user interference within tolerable limits and to improve the multiple access capability. Concatenated coding is proposed and analyzed as a method of improving the multiple access capability of a frequency hopped spread spectrum multiple access packet radio. Closed form expressions for the number of simultaneous users and system throughput are developed. Both interleaved and non interleaved cases are considered. Performance measures are numerically computed and the influence of concatenated coding parameters on these measures are evaluated for both cases.
Frequency Hopped Spread Spectrum Multiple Access (FH SSMA) with concatenated coding outperforms the multiple access capability of FH SSMA with Reed Solomon (RS) codes. An added advantage is that the decoders become simpler as the encoding and decoding of concatenated coding is achieved in two levels; each of which is simply implemented.
Description
Keywords
Citation
Degree
Master of Science (M.Sc.)
Department
Electrical Engineering