Multiple-Input Multiple-Output Self-Encoded Spread Spectrum System with Iterative Detection

Self-encoded spread spectrum (SESS) is a novel modulation technique that acquires its spreading sequence from the randomness of an input data stream rather than through the use of the traditional pseudo-random (PN) code generator. The statistical properties of random codes in SESS offer a number of advantages over the deterministic PN codes. In this paper we propose a multiple-input multiple-output (MIMO) SESS system that employs iterative detection to exploit the inherent time diversity in SESS modulation. Alamouti scheme-based spacetime block coded MIMO technique is used to exploit the spatial diversity. The simulation results demonstrate that the proposed system can completely mitigate the fading effect to achieve about 7.5 dB of gain over a PN-coded spread spectrum MIMO system in Rayleigh fading channels.

[1]  Won Mee Jang,et al.  Self-encoded spread spectrum modulation with differential encoding , 2002, IEEE Seventh International Symposium on Spread Spectrum Techniques and Applications,.

[2]  Lim Nguyen,et al.  Self-encoded spread spectrum and multiple access communications , 2000, 2000 IEEE Sixth International Symposium on Spread Spectrum Techniques and Applications. ISSTA 2000. Proceedings (Cat. No.00TH8536).

[3]  David W. Lin,et al.  Chip interleaving for performance improvement of coded DS-CDMA systems in Rayleigh fading channels , 2003, 2003 IEEE 58th Vehicular Technology Conference. VTC 2003-Fall (IEEE Cat. No.03CH37484).

[4]  A.S. Madhukumar,et al.  A simplified transceiver structure for cyclic extended CDMA system with frequency domain equalization , 2005, 2005 IEEE 61st Vehicular Technology Conference.

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

[6]  Rohit U. Nabar,et al.  Introduction to Space-Time Wireless Communications , 2003 .

[7]  Lajos Hanzo,et al.  Multiuser MIMO-OFDM for Next-Generation Wireless Systems , 2007, Proceedings of the IEEE.

[8]  Won Mee Jang,et al.  Synchronisation of self-encoded spread spectrum system , 2008 .

[9]  Won Mee Jang,et al.  Capacity analysis of m-user self-encoded multiple access system in AWGN channels , 2000, 2000 IEEE Sixth International Symposium on Spread Spectrum Techniques and Applications. ISSTA 2000. Proceedings (Cat. No.00TH8536).

[10]  David Gesbert,et al.  From theory to practice: an overview of MIMO space-time coded wireless systems , 2003, IEEE J. Sel. Areas Commun..

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

[12]  Won Mee Jang,et al.  Chip-interleaved self-encoded multiple access with iterative detection in fading channels , 2007, Journal of Communications and Networks.

[13]  Lim Nguyen,et al.  Self-encoded spread spectrum communications , 1999, MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341).