On the optimum processing gain of a block-coded direct-sequence spread-spectrum system

Author

Li, Kwok H. ; Milstein, Laurence B.

Author_Institution

Dept. of Electr. & Comput. Eng., California Univ., San Diego, La Jolla, CA, USA

Volume

7

Issue

4

fYear

1989

fDate

5/1/1989 12:00:00 AM

Firstpage

618

Lastpage

626

Abstract

The optimization between the processing gain and the coding gain of a constant-bandwidth direct-sequence spread-spectrum communication system operating in the presence of either a tone jammer or a Gaussian jammer such that the bit-error rate (BER) is minimized is presented. Both bipolar phase-shift keyed pseudo-noise (PN) modulation and quaternary phase-shift keyed PN modulation are considered. Binary BCH codes are used to illustrate the techniques for optimization. The exact BER and its Gaussian approximation are derived and compared. During the optimization, two different approaches are used to obtain the indicator functions of the optimum code. These indicators are tested and shown to yield good results.<>

Keywords

codes; encoding; errors; jamming; noise; phase shift keying; spread spectrum communication; Gaussian jammer; bipolar phase-shift keyed pseudo-noise; bit-error rate; block-coded direct-sequence spread-spectrum system; coding gain; optimisation; optimum processing gain; quaternary phase-shift keyed; tone jammer; Bit error rate; Gaussian approximation; Jamming; Phase modulation; Spread spectrum communication; Testing;

fLanguage

English

Journal_Title

Selected Areas in Communications, IEEE Journal on

Publisher

ieee

ISSN

0733-8716

Type

jour

DOI

10.1109/49.17726

Filename

17726