Title :
Performance of multidimensional TCM DS/SSMA system in urban multipath fading channel
Author :
Yang, Fengfang ; Bi, Guangguo
Author_Institution :
Dept. of Radio Eng., Southeast Univ., Nanjing, China
Abstract :
Multidimensional trellis-coded modulation (multi-D TCM) codes are applied to direct sequence spread spectrum multiple access (DS/SSMA) communication system in an urban multipath fading channel. Based on the characteristics of the channel under DS/SS and the models of the transmitter and receiver corresponding to multi-D TCM codes, an new way for analyzing the properties of multi-D TCM DS/SSMA systems over such channel is proposed. Simulation results show that the performance of the DS/SSMA system with TCM of a lower coding rate is better than that of system with traditional Ungerboeck´s TCM over the multipath fading channel, and the performance of the DS/SSMA systems can be improved greatly by adopting multi-D TCM codes, compared with that of systems with one dimensional TCM codes
Keywords :
code division multiple access; fading; multipath channels; pseudonoise codes; radio receivers; radio transmitters; spread spectrum communication; trellis coded modulation; DS/SS; DS/SSMA; TCM; coding rate; direct sequence spread spectrum multiple access; multidimensional TCM DS/SSMA system; multidimensional TCM codes; receiver; simulation results; system performance; transmitter; urban multipath fading channel; AWGN; Additive white noise; Amplitude modulation; Bandwidth; Delay effects; Equations; Fading; Mobile communication; Modulation coding; Multidimensional systems;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 1996. PIMRC'96., Seventh IEEE International Symposium on
Conference_Location :
Taipei
Print_ISBN :
0-7803-3692-5
DOI :
10.1109/PIMRC.1996.567417
