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Suppression of Narrowband Interference in Impulse Radio Based High Data Rate UWB WPAN Communication System Using NLOS Channel Model

Authors: Bikramaditya Das, Susmita Das


Study on suppression of interference in time domain equalizers is attempted for high data rate impulse radio (IR) ultra wideband communication system. The narrow band systems may cause interference with UWB devices as it is having very low transmission power and the large bandwidth. SRAKE receiver improves system performance by equalizing signals from different paths. This enables the use of SRAKE receiver techniques in IRUWB systems. But Rake receiver alone fails to suppress narrowband interference (NBI). A hybrid SRake-MMSE time domain equalizer is proposed to overcome this by taking into account both the effect of the number of rake fingers and equalizer taps. It also combats intersymbol interference. A semi analytical approach and Monte-Carlo simulation are used to investigate the BER performance of SRAKEMMSE receiver on IEEE 802.15.3a UWB channel models. Study on non-line of sight indoor channel models (both CM3 and CM4) illustrates that bit error rate performance of SRake-MMSE receiver with NBI performs better than that of Rake receiver without NBI. We show that for a MMSE equalizer operating at high SNR-s the number of equalizer taps plays a more significant role in suppressing interference.

Keywords: uwb, bit error rate, data rate, IR-UWB, IEEE 802.15.3a, NBI

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[1] A. Rajeswaran, V.S. Somayazulu and J. Foerster, "Rake performance for a pulse based UWB system in a realistic UWB indoor channel", IEEE ICC-03., vol. 4, pp. 2879-2883, May 2003.
[2] S. Gezici, H. V. Poor and H. Kobayashi, "Optimal and Suboptimal Finger Selection Algorithms for MMSE Rake Receivers in Impulse Radio Ultra-Wideband Systems", in Proc IEEE WCNC 2005, New- Orleans, Mar. 2005.
[3] J. R. Foerster, "The effect of multipath interference on the performance of UWB systems in an indoor wireless channel", in Proc. 2001 Spring Vehicular Technology Conf., pp. 1176-1180, May 2001.
[4] J. D. Choi and W. E. Stark, "Performance of ultra-wideband communications with suboptimal receivers in multipath channels", IEEE J. Select. Areas Commun., vol. 20, pp. 1754-1766, Dec. 2002.
[5] D. Cassioli, M. Z. Win, F. vAtalaro and F. Molisch, "Performance of low-complexity RAKE reception in a Realistic UWB channel", in Proc. Int. Conf. Commun. (ICC), vol. 2, May 2002, pp. 763-767.
[6] N. Boubaker and K.B. Letaief, "A Low Complexity RAKE Receiver in a realistic UWB Channel and in the presence of NBI," IEEE Wireless Communications and Networking, (WCNC), vol.1, pp.233-237, 2003.
[7] F Dowla, F Nekoogar, A.Spiridon, "Interference mitigation in transmitted-reference ultra-wideband receivers" IEEE International Symposium Antennas Propagate 2004, vol.2, pp.1307-1310, 2004.
[8] J.R. Foerster, "Interference modeling of pulse-based UWB waveforms on narrowband systems", IEEE 55th Vehicular Technology Conference, May 2002, vol.4, p.1931-1935.
[9] Bikramaditya Das, Susmita Das, "A Comparison Study of Receiver Performances on Ultrawide Band Indoor Wireless Channel Model," IEEE International Conference on Emerging Trends in Engineering & Technology, pp.1184-1188,Dec 16-18, 2009,Nagpur,India.
[10] Bikramaditya Das, Susmita Das, "RAKE-MMSE time domain equalizer for high data rate UWB communication system," IEEE International conference on Control, Communication and Automation (INDICON- 09), pp.141-144, Dec 18-20, 2009, Ahemdabad, India.
[11] Bikramaditya Das, Susmita Das, "A Comparison Study of Time domain Equalization Technique using Ultra wide band Receivers Performance for high data rate WPAN system", Published in Special Issue on, International journal of Computer Networks & Communications (IJCNC), vol.2, No.4, pp.22-35, 2010.