http://scholars.ntou.edu.tw/handle/123456789/4821| Title: | Beamforming degradation of a W-CDMA smart antenna under FDD and MAI channel estimation errors | Authors: | Chi-Min Li Hsueh-Jyh Li Pao-Jen Wang |
Keywords: | Array signal processing;Degradation;Multiaccess communication;Channel estimation;Multiple access interference;Estimation error;Signal to noise ratio;Frequency estimation;Broadband antennas;Information analysis | Issue Date: | 2007 | Journal Volume: | 6 | Start page/Pages: | 137 - 140 | Source: | Ieee Antennas and Wireless Propagation Letters | Abstract: | A smart antenna adopts the beamforming technique to increase the signal-to-(interference plus noise) ratio (SINR) and system capacity. In this paper, the impact of two channel estimation errors - frequency-division duplex (FDD) estimation error and multiple-access interference (MAI) estimation error for the beamforming of a wide-band code-division multiple-access smart antenna - are analyzed by using the measured channel state information. Results show that for a complex conjugate beamforming, FDD estimation error will cause median degradation of less than 1 dB if the desired signal is in a line-of-sight (LOS) channel and 1-3 dB if in a non-LOS (NLOS) channel. In addition, the MAI estimation error will cause 0.3-0.5 dB degradation per interference in the LOS case and 0.5-1 dB degradation in the NLOS case |
URI: | http://scholars.ntou.edu.tw/handle/123456789/4821 | ISSN: | 1536-1225 | DOI: | 10.1109/lawp.2007.893100 |
| Appears in Collections: | 通訊與導航工程學系 |
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