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Multi-Sequence Signaling Based Asynchronous Trellis-Coded DS/CDMA System  

Sangho Choe (School of Information, Communications & Electronics Engineering, The Catholic University of Korea)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.29, no.3A, 2004 , pp. 248-256 More about this Journal
Abstract
Woerner had suggested an asynchronous trellis-coded DS/CDMA system based on a multi-sequence signaling, biorthogonal sequence, which is superior to single sequence signaling, such as M-ary PSK, due to their better cross-correlation properties. This paper analyzes and compares system performance between OPSM, a recently-presented multi-sequence signaling scheme, and biorthogonal sequence signaling. Interuser interference moments of the two schemes are derived and compared which verifies that OPSM, having smaller signature sequences per symbol than biorthogonal signaling, reduces cross-correlation. Numerical results compare the power and spectral efficiency of asynchronous trellis-coded DS/CDMA systems based on multi-sequence signaling.
Keywords
Trellis-coded modulation(TCM); CDMA system; signaling sequence; power and/or spectral efficiency; cross-correlation;
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