A Beamspace-Time Blind RAKE Receiver for Sectored CDMA Systems

被引:0
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作者
Ta-Sung Lee
Teng-Cheng Tsai
Chun-Hong Chen
机构
[1] National Chiao Tung University,Department of Communication Engineering and Microelectronics and Information Systems Research Center
来源
关键词
CDMA; RAKE receiver; array beamforming; interference cancellation;
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学科分类号
摘要
A beamspace-time (BT) RAKE receiver is proposed for multiple accessinterference (MAI) suppression and multipath diversity reception insectored wireless CDMA communications. The scheme involves three stages.First, a set of adaptive beamformers encompassing a prescribed angular sectoris constructed on an antenna array, each providing effective suppression ofout-of-sector MAI and reception of in-sector signal. Second, a set of adaptivecorrelators is attached to each beam to combat in-sector MAI. Finally, thebeamspace correlator output data are combined to capture the signal multipathscoherently.The above three-stage operation is performed in a blind mode inthat no training signal is needed. The only information required is the signature,timing and a rough estimate of the angle of arrival (AOA) of the desired signal.
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页码:65 / 83
页数:18
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