Iterative Decoding of Orthogonal Space-Time Coded CPM Systems

We present an iterative decoding/demodulation technique for an orthogonal space-time coded continuous-phase modulation (OST-CPM) system. A low-complexity soft input and soft output (SISO) demodulator is developed based on the bidirectional soft output Viterbi algorithm (BSOVA) for the multiple antennas CPM systems. By taking advantage of the orthogonal structure, the complexity of extrinsic information extraction can be significantly reduced at each iteration.

[1]  F. Pollara,et al.  Serial concatenation of interleaved codes: performance analysis, design and iterative decoding , 1996, Proceedings of IEEE International Symposium on Information Theory.

[2]  John G. Proakis,et al.  Digital Communications , 1983 .

[3]  Xiang-Gen Xia,et al.  An orthogonal space-time coded CPM system with fast decoding for two transmit antennas , 2004, IEEE Trans. Inf. Theory.

[4]  Dariush Divsalar,et al.  A soft-input soft-output APP module for iterative decoding of concatenated codes , 1997, IEEE Communications Letters.

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

[6]  Michael P. Fitz,et al.  Soft-output demodulator in space-time-coded continuous phase modulation , 2002, IEEE Trans. Signal Process..

[7]  Branka Vucetic,et al.  Turbo Codes: Principles and Applications , 2000 .

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

[9]  Keith M. Chugg,et al.  On forward-adaptive versus forward/backward-adaptive SISO algorithms for Rayleigh fading channels , 2001, IEEE Communications Letters.

[10]  Emre Telatar,et al.  Capacity of Multi-antenna Gaussian Channels , 1999, Eur. Trans. Telecommun..

[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]  Gerard J. Foschini,et al.  Layered space-time architecture for wireless communication in a fading environment when using multi-element antennas , 1996, Bell Labs Technical Journal.

[13]  Tor Aulin,et al.  Serially concatenated continuous phase modulation with iterative decoding , 2001, IEEE Trans. Commun..