Title :
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
fDate :
5/1/1989 12:00:00 AM
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;
Journal_Title :
Selected Areas in Communications, IEEE Journal on
