Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Nonparametric Interference Suppression Using Cyclic Wiener Filtering: Pulse Shape Design and Performance Evaluation | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2008 Article ID 243548 14 pages doi 2008 243548 Research Article Nonparametric Interference Suppression Using Cyclic Wiener Filtering Pulse Shape Design and Performance Evaluation Anass Benjebbour Takahiro Asai and Hitoshi Yoshino Research Laboratories NTT DoCoMo Inc. 3-5 Hikarinooka Yokosuka Kanagawa 239-8536 Japan Correspondence should be addressed to Anass Benjebbour anass@ Received 29 June 2007 Accepted 23 October 2007 Recommended by Ivan Cosovic In the future there will be a growing need for more flexible but efficient utilization of radio resources. Increased flexibility in radio transmission however yields a higher likelihood of interference owing to limited coordination among users. In this paper we address the problem of flexible spectrum sharing where a wideband single carrier modulated signal is spectrally overlapped by unknown narrowband interference NBI and where a cyclic Wiener filter is utilized for nonparametric NBI suppression at the receiver. The pulse shape design for the wideband signal is investigated to improve the NBI suppression capability of cyclic Wiener filtering. Specifically two pulse shaping schemes which outperform existing raised cosine pulse shaping schemes even for the same amount of excess bandwidth are proposed. Based on computer simulation the interference suppression capability of cyclic Wiener filtering is evaluated for both the proposed and existing pulse shaping schemes under several interference conditions and over both AWGN and Rayleigh fading channels. Copyright 2008 Anass Benjebbour et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. INTRODUCTION In future wireless systems there is a need to support the explosive growth in number of users
