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 Interference Robust Transmission for the Downlink of an OFDM-Based Mobile Communications System | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2008 Article ID 549371 14 pages doi 2008 549371 Research Article Interference Robust Transmission for the Downlink of an OFDM-Based Mobile Communications System Markus Konrad and Wolfgang Gerstacker Institute of Mobile Communications University of Erlangen-Nuremberg Cauerstrasse 7 91058 Erlangen Germany Correspondence should be addressed to Markus Konrad konrad@ Received 27 April 2007 Revised 24 August 2007 Accepted 17 November 2007 Recommended by Luc Vandendorpe Radio networks for future mobile communications systems for example 3GPP Long-Term Evolution LTE are likely to use an orthogonal frequency division multiplexing- OFDM- based air interface in the downlink with a frequency reuse factor of one to avoid frequency planning. Therefore system capacity is limited by interference which is particularly crucial for mobile terminals with a single receive antenna. Nevertheless next generation mobile communications systems aim at increasing downlink throughput. In this paper a single antenna interference cancellation SAIC algorithm is introduced for amplitude-shift keying ASK modulation schemes in combination with bit-interleaved coded OFDM. By using such a transmission strategy high gains in comparison to a conventional OFDM transmission with quadrature amplitude modulation QAM can be achieved. The superior performance of the novel scheme is confirmed by an analytical bit-error probability BEP analysis of the SAIC receiver for a single interferer Rayleigh fading and uncoded transmission. For the practically more relevant multiple interferer case we present an adaptive least-mean-square LMS and an adaptive recursive least-squares RLS SAIC algorithm. We show that in particular the RLS approach enables a good tradeoff between performance and complexity and is robust even to multiple interferers. Copyright 2008 M. Konrad and W. Gerstacker. This is an open access .
