NBI Suppression in Non-Linear UWB Channels using Second Order CPP-ANF

AUTHOR(S):

Farhana Begum, Manash Pratim Sarma, Kandarpa Kumar Sarma

TITLE

NBI Suppression in Non-Linear UWB Channels using Second Order CPP-ANF

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KEYWORDS

UWB, NBI, ANF, CPP, non-linear, NARMA

ABSTRACT

UWB systems are continuously affected by narrow band interference (NBI) emanating from traditional sources for which its mitigation continues to be a challenging issue. This is more so if the channels are considered to be non-linear which in reality is the actual scenario. NBI suppression is an essential element for achieving appropriate quality of service (QoS) and ensuring link reliability. Here, we report the design of a second-order adaptive notch filter (ANF) based scheme designed for suppression of single and multiple NBI in non-linear channel condition used by UWB systems. The proposed second order ANF uses a gradient descent adaptation in combined pipelined-parallelism (CPP) approach demonstrating reduced computational complexity and lower power requirement for an efficient hardware design. The CPP mode is ascertained after performing certain experiments using a number of digital filter design approaches like direct, cascade etc. Further, the system is also tested under IEEE 802.15.3a CM1, CM2, CM3, and CM4 channels

REFERENCES

[1] J. Balakrishnan, A. Batra, and A. Dabak, “A multi-band OFDM system for UWB communication”, in Proceedings of IEEE Conference on Ultra Wideband System Technology, Reston, Va, USA, pp. 354-358, November, 2003.

[2] L. Yang and G. B. Giannakis, “Ultra-wideband commu-nications, “An idea whose time has come”, IEEE Signal Processing Magazine, vol. 21, no. 6, pp. 26-54, November, 2004.

[3] R. Bose, “On the performance of Turbo Codes over UWB channels at low SNR”, WSEAS Transactions on Communications, vol. 2, no. 3, pp. 314-322, July, 2003.

[4] C. T. Manimegalai and R. Kumar, “Performance of LDPC- Coded APSK-Modulation for Wireless USB”, WSEAS Transactions on Communications, vol. 12, no. 12, pp. 661-669, December, 2013.

[5] X.Lua, J-G-Mak, K.S Yeo and E-P Liu, “Compact ultra-wideband(UWB) bandpass filter with ultra-narrow dual and quad-notched banks”, in IEEE Transactions on Microwave Theory technology, vol. 59, no. 6, pp. 1509-1519, June 2011.

[6] R. Ghatak, P. Sarkar, R.Mishra and D.Poddar, “ A compact UWB bandpass filter with embedded SIR as notch structure”, IEEE Microwave Wireless Communication Letters, vol. 21, no. 5, pp. 261-263, May 2011. [7] W. Yu, Y. Shim and M.Rais-Zadeh, “Miniaturized UWB filters with tunable notch filters using a silicon-based integrated passive technology,” in IEEE Transactions on Microwave Theory Journal, vol. 60, no. 3, pp. 518-527, March 2012.

[8] H. Xiong, W. Zhang, Z. Duo, B. He and D. Yuan, “Front-End Narrowband Interference Mitigation for DS-UWB Receiver”, in IEEE Transactions on Wirelesss Communications, vol. 12, no. 13, September 2013. [9] C. Jun Won and C. Nam, “ Suppression of narrow band interference in DS spread spectrum using adaptive IIR notch filter,” IEEE Journal on Signal Processing, vol. 54, no. 8, pp. 2003-2013, December 2002.

[10] M. Niewdwicky, “ Tracking Analysis of a generalised Adaptive Notch Filter,” IEEE Journal on Signal Processing, vol. 54, no. 1, pp. 304-314, January 2006.

[11] A. Regalia, “A Complex Adaptive Notch Filter,” in IEEE Signal Processing Letters, vol. 17, no. 11, pp. 937-938, November 2010.

[12] F. Begum, M. P. Sarma and K. K. Sarma, “Preamble aided Energy Detection based Synchronization in Non-Coherent UWB Receivers”, in Proceedings of IEEE International Conference on Signal Processing and Integrated Networks , Noida, India, February 2014.

[13] F. Begum, M. P. Sarma, K. K. Sarma and N. Mastorakis, “NBI Suppression in UWB System in Stochastic Non-Linear Channels”, in Proceedings of 2 nd International Conference on Wireless and Mobile Communication Systems (WMCS14), Lisbon, Portugal, October 30 - November 1, 2014.

[14] F. Begum, M. P. Sarma, K. K. Sarma and N. Mastorakis, “Interference Suppression using CPP Adaptive Notch Filters for UWB Synchronization in Stochastic Non-Linear Channels”, in Proceedings of IEEE Symposium Series on Computational Intelligence (SSCI 2014), Orlando, Florida, USA, December, 2014.

[15] A. F. Molish, “Ultra-wideband Propagation Channel Theory, Measurement and Modeling”, IEEE Transactions on Vehicular Technology, vol. 54, no. 5, pp. 1528-1545, 2005.

Cite this paper

Farhana Begum, Manash Pratim Sarma, Kandarpa Kumar Sarma. (2016) NBI Suppression in Non-Linear UWB Channels using Second Order CPP-ANF. International Journal of Circuits and Electronics, 1, 23-32