Concatenation of space-time block codes and LDPC codes

Space-Time coding is widely used in wireless communication systems, in order to provide diversity gain and overcome fading effects of multipath propagation, also by using channel codes, such as Convolutional, Turbo and LDPC coding, we can increase coding gain and obtain performance result near to Shannon limit. In this paper, we consider the concatenation of LDPC coding as outer code and Alamouti'sG2 space-time block codes as inner codes to achieve the benefits of both techniques; In addition the performance of proposed system is studied as a function of LDPC decoding parameters e. g. frame length, number of iteration, coding rate and constellation mapping over Rayleigh flat-fading and AWGN noisy channel.

[1]  A. Robert Calderbank,et al.  Space-Time block codes from orthogonal designs , 1999, IEEE Trans. Inf. Theory.

[2]  B. L. Yeap,et al.  Turbo Coding, Turbo Equalisation and Space-Time Coding , 2002 .

[3]  Robert G. Gallager,et al.  Low-density parity-check codes , 1962, IRE Trans. Inf. Theory.

[4]  Vahid Tarokh,et al.  Space-time coded OFDM for high data-rate wireless communication over wideband channels , 1998, VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151).

[5]  Rüdiger L. Urbanke,et al.  Design of capacity-approaching irregular low-density parity-check codes , 2001, IEEE Trans. Inf. Theory.

[6]  Siavash M. Alamouti,et al.  A simple transmit diversity technique for wireless communications , 1998, IEEE J. Sel. Areas Commun..

[7]  Xiaodong Wang,et al.  LDPC-based space-time coded OFDM systems over correlated fading channels: performance analysis and receiver design , 2001, Proceedings. 2001 IEEE International Symposium on Information Theory (IEEE Cat. No.01CH37252).

[8]  Ran Gozali,et al.  Space-Time Codes for High Data Rate Wireless Communications , 2002 .

[9]  Radford M. Neal,et al.  Near Shannon limit performance of low density parity check codes , 1996 .

[10]  G. Bauch.  Concatenation of space-time block codes and "turbo"-TCM , 1999, 1999 IEEE International Conference on Communications (Cat. No. 99CH36311).

[11]  A. Glavieux,et al.  Near Shannon limit error-correcting coding and decoding: Turbo-codes. 1 , 1993, Proceedings of ICC '93 - IEEE International Conference on Communications.

[12]  Shlomo Shamai,et al.  Fading Channels: Information-Theoretic and Communication Aspects , 1998, IEEE Trans. Inf. Theory.