Title :
Downlink transmit diversity: feedback efficiency and robustness
Author :
Nagaraj, Shirish ; Huang, Eh-Fang
Author_Institution :
Dept. of Electr. Eng., Notre Dame Univ., IN, USA
Abstract :
A recently introduced method for closed-loop transmit diversity (see Nagaraj, S. and Huang, Y.F., Asilomar Conference on Signals, Systems and Computers, 2000) is further analyzed in this paper. Specifically, the amount of power saving possible due to the inherent feature of selective feedback is quantified via a capacity analysis. An optimal adaptive algorithm for channel estimation, in the sense of maximum likelihood, is derived to provide robustness against feedback errors, which arise due to incorrect detection at the mobile
Keywords :
adaptive estimation; diversity reception; feedback; maximum likelihood estimation; mobile radio; capacity analysis; channel estimation; closed-loop transmit diversity; downlink transmit diversity; feedback efficiency; feedback errors; incorrect detection; maximum likelihood; mobile station; optimal adaptive algorithm; power saving; selective feedback; Array signal processing; Degradation; Downlink; Error correction; Fading; Maximum likelihood detection; Maximum likelihood estimation; Robustness; Signal processing; State feedback;
Conference_Titel :
Personal Wireless Communications, 2000 IEEE International Conference on
Conference_Location :
Hyderabad
Print_ISBN :
0-7803-5893-7
DOI :
10.1109/ICPWC.2000.905764
