A Novel Multipath Transmission Diversity Scheme in TDD-CDMA Systems

Ji-Bing WANG  Ming ZHAO  Shi-Dong ZHOU  Yan YAO  

Publication
IEICE TRANSACTIONS on Communications   Vol.E82-B    No.10    pp.1706-1709
Publication Date: 1999/10/25
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Mobile Communication
Keyword: 
eigenfilter,  TDD-CDMA,  multipath,  RAKE,  FIR filter,  

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Summary: 
A novel multipath diversity scheme used in TDD-CDMA systems is presented. A FIR filter is added in the transmitter, while a RAKE combiner is used in the receiver. The optimum FIR filter problem may be viewed as an eigenvalue problem. The multiple antennas system is also analyzed. Results show that this new scheme can greatly improve the output Signal to Noise Ratio (SNR) compared with conventional RAKE receiver or Pre-RAKE diversity system.