Title :
Analysis and performance evaluation of synchronous trellis-coded CDMA for satellite applications
Author :
De Gaudenzi, R. ; Giannetti, F.
Author_Institution :
European Space Res. & Technol. Centre, Eur. Space Agency, Paris, France
Abstract :
Synchronous trellis-coded code division multiple access (S-TC-CDMA) for satellite communications is introduced and analysed. Compared with asynchronous CDMA (A-CDMA) and uncoded synchronous CDMA (S-CDMA) systems, S-TC-CDMA improves the power and/or the bandwidth efficiency by using trellis-coded PSK or QAM modulation in conjunction with independent orthogonal I-Q direct sequence spectrum spreading (DS/SS). An approximate formula for the bit error rate performance of S-TC-CDMA in the AWGN channel with co-channel interference is derived and favorably compared to computer simulation results. Finally, the system performance degradation due to the satellite nonlinearities and multipath fading is investigated.<>
Keywords :
Gaussian channels; cochannel interference; code division multiple access; error statistics; fading; multipath channels; phase shift keying; pseudonoise codes; quadrature amplitude modulation; satellite communication; spread spectrum communication; trellis coded modulation; AWGN channel; S-TC-CDMA; bandwidth efficiency; bit error rate; co-channel interference; code division multiple access; independent orthogonal I-Q direct sequence spectrum spreading; multipath fading; nonlinearities; performance degradation; performance evaluation; power; satellite communications; synchronous trellis-coded CDMA; trellis-coded PSK modulation; trellis-coded QAM modulation; AWGN channels; Bandwidth; Bit error rate; Code division multiplexing; Interchannel interference; Multiaccess communication; Performance analysis; Phase shift keying; Quadrature amplitude modulation; Satellite communication;
Journal_Title :
Communications, IEEE Transactions on
