Title :
Hybrid DS/SFH spread-spectrum multiple access with predetection diversity and coding for indoor radio
Author :
Wang, Jiangzhou ; Moeneclaey, Marc
Author_Institution :
Commun. Eng. Lab., Ghent Univ., Belgium
fDate :
5/1/1992 12:00:00 AM
Abstract :
The authors derive close upper and lower bounds on the average bit error probability for hybrid direct-sequence/slow-frequency-hopped spread-spectrum multiple-access (DS/SFH-SSMA) systems with noncoherent DPSK demodulation, using predetection diversity (selection combining and equal gain combining) in conjunction with interleaved channel coding (Hamming (7,4) code and BCH (15,7) code) operating through indoor radio channels. A multipath Rayleigh fading model is assumed for the indoor radio channel. The results show that the DS portion of the modulation combats the multipath interference, whereas the FH portion is a protection against large multiaccess interference. It is shown that, for the considered types of channel coding, the use of predetection diversity is still essential for obtaining satisfactory error performance
Keywords :
digital radio systems; diversity reception; encoding; fading; multi-access systems; radiofrequency interference; spread spectrum communication; BCH code; DS/SFH-SSMA; Hamming code; Rayleigh fading model; average bit error probability; channel coding; direct sequence slow frequency hopped systems; equal gain combining; error bound; indoor radio; interleaved channel coding; large multiaccess interference; multipath interference; noncoherent DPSK demodulation; predetection diversity; selection combining; spread-spectrum multiple access; Channel coding; Demodulation; Differential quadrature phase shift keying; Diversity reception; Error probability; Indoor radio communication; Interference; Protection; Rayleigh channels; Spread spectrum communication;
Journal_Title :
Selected Areas in Communications, IEEE Journal on
