tailieunhanh - Báo cáo hóa học: " Research Article On Intercell Interference and Its Cancellation in Cellular Multicarrier CDMA Systems Simon Plass German Aer"

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 On Intercell Interference and Its Cancellation in Cellular Multicarrier CDMA Systems Simon Plass German Aer | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2008 Article ID 173645 11 pages doi 2008 173645 Research Article On Intercell Interference and Its Cancellation in Cellular Multicarrier CDMA Systems Simon Plass German Aerospace Center DLR Institute of Communications and Navigation Oberpfaffenhofen 82234 Wessling Germany Correspondence should be addressed to Simon Plass Received 2 May 2007 Accepted 17 September 2007 Recommended by Luc Vandendorpe The handling of intercell interference at the cell border area is a strong demand in future communication systems to guarantee efficient use of the available bandwidth. Therefore this paper focuses on the application of iterative intercell interference cancellation schemes in cellular multicarrier code division multiple access MC-CDMA systems at the receiver side for the downlink. First the influence of the interfering base stations to the total intercell interference is investigated. Then different concepts for intercell interference cancellation are described and investigated for scenarios with several interfering cells. The first approach is based on the use of the hard decision of the demodulator to reconstruct the received signals. This does not require the higher amount of complexity compared to the second approach which is based on the use of the more reliable soft values from the decoding process. Furthermore the extrinsic information as a reliability measure of this soft iterative cancellation process is investigated in more detail based on the geographical position of the mobile terminal. Both approaches show significant performance gains in the severe cell border area. With the soft intercell interference cancellation scheme it is possible to reach the single-user bound. Therefore the intercell interference can be almost eliminated. Copyright 2008 Simon Plass. This is an open access article distributed under the Creative Commons Attribution