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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Sheng-Luen Wei Shynk, J.J. |
| Copyright Year | 2008 |
| Description | Author affiliation: Dept. of Electr. & Comput. Eng., Univ. of California, Santa Barbara, CA (Sheng-Luen Wei; Shynk, J.J.) |
| Abstract | A semiblind beamformer using a parallel pilot signal in the adaptive algorithm is investigated for wideband code-division multiple-access (WCDMA) systems. Although the pilot signal and traffic channels are designed to be transmitted using orthogonal codes in the downlink direction, time dispersion and frequency-selective fading in the transmission channel severely degrade this orthogonality at the receiver. As a result, the traffic signal of a target base station appears as interference coming from the same direction as the pilot signal, and causes poor performance of a pilot-only training-based beamformer. In order to mitigate this effect, we propose a semiblind beamforming algorithm that jointly exploits the pilot signal and the traffic channel signals. A modified version of the semiblind beamformer simultaneously suppresses self-interference and cochannel interference from other base stations. The proposed semiblind techniques outperform the conventional pilot-only approach as demonstrated via computer simulations. |
| Starting Page | 1 |
| Ending Page | 4 |
| File Size | 1283420 |
| Page Count | 4 |
| File Format | |
| ISBN | 9781424426768 |
| DOI | 10.1109/MILCOM.2008.4753285 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2008-11-16 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Multiaccess communication Base stations Adaptive algorithm Wideband Signal design Downlink Frequency Fading Degradation Interference |
| Content Type | Text |
| Resource Type | Article |
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