Performance comparisons of concatenated codes with iterative decoding for DS-CDMA systems with application to IS-95-based cellular systems
作者： D.N. Kalofonos , E. Kurtas , J.G. Proakis
关键词: Convolutional code 、 Error floor 、 Decoding methods 、 Code division multiple access 、 Turbo code 、 Interleaving 、 Linear code 、 Encoder 、 Sequential decoding 、 Serial concatenated convolutional codes 、 Concatenation 、 Additive white Gaussian noise 、 Viterbi decoder 、 Channel code 、 Algorithm 、 Computer science 、 Spread spectrum 、 Concatenated error correction code 、 Communication channel 、 Theoretical computer science 、 Multipath rayleigh fading channel 、 Turbo equalizer
摘要: The remarkable performance of turbo codes for low SNRs in AWGN channels has encouraged the application to systems operating different kind channels. In this paper we consider an IS-95-based CDMA system a multipath Rayleigh fading channel. We replace convolutional encoder by parallel and serial encoding scheme, concatenation outer inner code, instead Viterbi decoder use iterative decoding based on MAP algorithm. perform BER FER comparisons varying parameters such as constraint length component codes, interleaver lengths, wireless channel rate. results obtained show that concatenated schemes outperform more complex scheme even relatively short interleaving especially when is desired figure merit.
sci-hub.se 参考文章(8)
L. R. Bahl, Optimal decoding of linear codes for minimizing symbol error rate IEEE Transactions on Information Theory. ,vol. 20, pp. 284- 287 ,(1974)
P. Dent, G.E. Bottomley, T. Croft, Jakes fading model revisited Electronics Letters. ,vol. 29, pp. 1162- 1163 ,(1993) , 10.1049/EL:19930777
L. Bahl, J. Cocke, F. Jelinek, J. Raviv, Optimal decoding of linear codes for minimizing symbol error rate (Corresp.) IEEE Transactions on Information Theory. ,vol. 20, pp. 284- 287 ,(1974) , 10.1109/TIT.1974.1055186
C. Berrou, A. Glavieux, Near optimum error correcting coding and decoding: turbo-codes IEEE Transactions on Communications. ,vol. 44, pp. 1261- 1271 ,(1996) , 10.1109/26.539767
S. Benedetto, G. Montorsi, Design of parallel concatenated convolutional codes IEEE Transactions on Communications. ,vol. 44, pp. 591- 600 ,(1996) , 10.1109/26.494303
R. Herzog, J. Hagenauer, A. Schmidbauer, Soft-in/soft-out Hadamard despreader for iterative decoding in the IS-95(A) system vehicular technology conference. ,vol. 2, pp. 1219- 1222 ,(1997) , 10.1109/VETEC.1997.600525
P. Robertson, E. Villebrun, P. Hoeher, A comparison of optimal and sub-optimal MAP decoding algorithms operating in the log domain international conference on communications. ,vol. 2, pp. 1009- 1013 ,(1995) , 10.1109/ICC.1995.524253
S. Benedetto, D. Divsalar, G. Montorsi, F. Pollara, Serial concatenation of interleaved codes: performance analysis, design and iterative decoding international symposium on information theory. ,vol. 44, pp. 909- 926 ,(1997) , 10.1109/18.669119