Iterative decoding for space time block coded PPM-TH UWB systems

In this paper, we analyze and simulate the iterative decoding performance of space time block coded (STBC) pulse position modulation-time hopping (PPM-TH) ultra-wideband (UWB) systems in indoor environments. The indoor wireless channel is modeled as a modified Saleh and Valenzuela (SV) channel, which is proposed as a UWB indoor channel model by IEEE 802.15.SG3a. In order to reduce the iterative decoding complexity, Max-Log-MAP algorithm is employed. The performance is evaluated in terms of bit error probability (BEP). From simulation results, it is shown that the double binary turbo coding scheme offers considerable coding gain compared with an uncoded system according as the number of iterations increases.

[1]  Debra McKeown,et al.  Ultra-Wideband Radio Technology: Siwiak/Ultra-Wideband , 2005 .

[2]  Claude Berrou,et al.  Multiple parallel concatenation of circular recursive systematic convolutional (Crsc) codes , 1999, Ann. des Télécommunications.

[3]  Moe Z. Win,et al.  Impulse radio: how it works , 1998, IEEE Communications Letters.

[4]  Moe Z. Win,et al.  On the robustness of ultra-wide bandwidth signals in dense multipath environments , 1998, IEEE Communications Letters.

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

[6]  Claude Berrou,et al.  Turbo codes with rate-m/(m+1) constituent convolutional codes , 2005, IEEE Transactions on Communications.

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

[8]  Fernando Ramírez-Mireles.  On the performance of ultra-wide-band signals in Gaussian noise and dense multipath , 2001, IEEE Trans. Veh. Technol..

[9]  Fernando Ramírez-Mireles,et al.  Performance of ultrawideband SSMA using time hopping and M-ary PPM , 2001, IEEE J. Sel. Areas Commun..

[10]  Moe Z. Win,et al.  Ultra-wide bandwidth signal propagation for indoor wireless communications , 1997, Proceedings of ICC'97 - International Conference on Communications.

[11]  Mohinder Jankiraman,et al.  Space-Time Codes and Mimo Systems , 2004 .

[12]  Ian Oppermann,et al.  UWB Theory and Applications: Oppermann/UWB: Theory and Applications , 2005 .

[13]  Debra McKeown,et al.  Ultra-wideband Radio Technology , 2004 .

[14]  S. Wicker.  Error Control Systems for Digital Communication and Storage , 1994 .

[15]  Guerino Giancola,et al.  Understanding Ultra Wide Band Radio Fundamentals , 2004 .

[16]  Shu Lin,et al.  Error Control Coding , 2004 .

[17]  J. Foerster,et al.  Channel modeling sub-committee report final , 2002 .

[18]  A. Robert Calderbank,et al.  Space-time block coding for wireless communications: performance results , 1999, IEEE J. Sel. Areas Commun..

[19]  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.

[20]  Moe Z. Win,et al.  Ultra-wide bandwidth time-hopping spread-spectrum impulse radio for wireless multiple-access communications , 2000, IEEE Trans. Commun..