tailieunhanh - Báo cáo hóa học: "A Combined Antenna Arrays and Reverse-Link Synchronous DS-CDMA System over Frequency-Selective Fading Channels with Power Control Error"

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: A Combined Antenna Arrays and Reverse-Link Synchronous DS-CDMA System over Frequency-Selective Fading Channels with Power Control Error | EURASIP Journal on Applied Signal Processing 2004 9 1299-1307 2004 Hindawi Publishing Corporation A Combined Antenna Arrays and Reverse-Link Synchronous DS-CDMA SyStem over Frequency-Selective Fading Channels with Power Control Error Yong-Seok Kim Communication System Lab. School of Electrical and Electronics Engineering Yonsei University 134 Sinchon-dong Seodaemun-gu Seoul 120-749 Korea Email dragon@ Seung-Hoon Hwang Standardization and System Research Group Mobile Communication Technology Research Laboratory LG Electronics 533 Hogye-dong Dongan-gu Anyang-shi Kyungki-do Korea School of Electronics and Computer Sciences University of Southampton Highfield Southampton SO171BJ UK Email shwang@ Hyo-Yol Park Communication System Lab. School of Electrical and Electronics Engineering Yonsei University 134 Sinchon-dong Seodaemun-gu Seoul 120-749 Korea Email seahog@ Keum-Chan Whang Communication System Lab. School of Electrical and Electronics Engineering Yonsei University 134 Sinchon-dong Seodaemun-gu Seoul 120-749 Korea Email kcwhang@ Received 26 May 2003 Revised 28 January 2004 An improved antenna array AA has been introduced in which reverse-link synchronous transmission technique RLSTT is incorporated to effectively make better an estimation of covariance matrices at a beamformer-RAKE receiver. While RLSTT is effective in the first finger at the RAKE receiver in order to reject multiple-access interference MAI the beamformer estimates the desired user s complex weights enhancing its signal and reducing cochannel interference CCI from the other directions. In this work it is attempted to provide a comprehensive analysis of user capacity which reflects several important factors such as the shape of multipath intensity profile MIP the number of antennas and power control error PCE . Theoretical analysis confirmed by the simulations demonstrates that the orthogonality provided by employing RLSTT along with AA may make .