Title :
Direct-sequence spread-spectrum parallel acquisition in a fading mobile channel
Author :
Sourour, Essam A. ; Gupta, Someshwar C.
Author_Institution :
Dept. of Electr. Eng., Southern Methodist Univ., Dallas, TX, USA
fDate :
7/1/1990 12:00:00 AM
Abstract :
A parallel acquisition scheme for direct-sequence spread-spectrum systems is proposed, and its mean acquisition time performance is analyzed in both nonfading and Rayleigh-fading environments. An expression for the mean acquisition time is derived in terms of the probabilities of detection, missing, and false alarm. These parameters are first analyzed for a typical AWGN (additive white Gaussian noise) channel, then the Rayleigh-fading channel encountered in a typical UHF or microwave land mobile radio channel is studied. The channel is assumed frequency nonselective, and the effect of data modulation and code Doppler is not considered. The performance of the parallel system is compared to the corresponding serial system, and it is shown that a significant improvement can be achieved
Keywords :
fading; mobile radio systems; spread spectrum communication; telecommunication channels; AWGN channel; Rayleigh-fading environments; UHF; additive white Gaussian noise; detection probability; direct-sequence spread-spectrum systems; fading mobile channel; false alarm probability; mean acquisition time; microwave land mobile radio channel; missing probability; nonfading environment; parallel acquisition scheme; AWGN; Acoustic testing; Additive white noise; Convolvers; Fading; Frequency; Jamming; Matched filters; Spread spectrum communication; Surface acoustic waves;
Journal_Title :
Communications, IEEE Transactions on
