Downlink transmit diversity: feedback efficiency and robustness

Author

Nagaraj, Shirish ; Huang, Eh-Fang

Author_Institution

Dept. of Electr. Eng., Notre Dame Univ., IN, USA

fYear

2000

fDate

2000

Firstpage

14

Lastpage

18

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Personal Wireless Communications, 2000 IEEE International Conference on

Conference_Location

Hyderabad

Print_ISBN

0-7803-5893-7

Type

conf

DOI

10.1109/ICPWC.2000.905764

Filename

905764