Title :
Design and analysis of concatenated coded DS/CDMA systems in asynchronous channels
Author :
Kim, Kwang Soon ; Kim, Sun Yong ; Kim, Suk Chan ; Song, Iickho
Author_Institution :
Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Daejeon, South Korea
fDate :
9/1/1999 12:00:00 AM
Abstract :
We propose and analyze concatenated coding schemes for direct-sequence code-division multiple-access (DS/CDMA) systems in asynchronous channels. In the concatenated coding, bandwidth-efficient 2 2L-2-state L/(L+1)-rate 2-MTCM with biorthogonal signal constellation is used for the inner code, and (2L-1,[(2L -1)/L/2]) RS code is used for the outer code. It is shown that we can get considerable performance gain over the uncoded system without sacrificing the data transmission rate. The proposed system can be used as a coding scheme for reliable and high-speed integrated information services of mobile communication systems
Keywords :
Reed-Solomon codes; code division multiple access; concatenated codes; data communication; information services; land mobile radio; multiuser channels; spread spectrum communication; trellis coded modulation; RS code; asynchronous channels; bandwidth-efficient 2-MTCM; biorthogonal signal constellation; concatenated coded DS/CDMA systems; concatenated coding; data transmission rate; direct-sequence code-division multiple-access; high-speed integrated information services; inner code; mobile communication systems; mobile communications; outer code; performance gain; reliable integrated information services; systems analysis; systems design; trellis-coded modulation; uncoded system; Bandwidth; Bit error rate; Concatenated codes; Constellation diagram; Convolutional codes; Data communication; Mobile communication; Modulation coding; Multiaccess communication; Phase shift keying;
Journal_Title :
Vehicular Technology, IEEE Transactions on
