Signal synthesis method and apparatus under diversity reception

Details Signal synthesis method and apparatus under diversity reception Signal synthesis method and apparatus under diversity reception

1999-05-27

2000-09-12

Vo, Don N.

Pulse or digital communications

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370342, H04B 1500, H04K 100, H04L 2730

Patent

active

061188069

ABSTRACT:
An apparatus for combining signals includes RAKE receivers 10, 20, noise-power measuring apparatuses 30, 40, and a branch combiner 50. The RAKE receivers 10, 20 are the same in number as the antenna branches, and each RAKE receiver combines received signals by using a weight based on an amplitude of each received signal. Each of the noise-power measuring apparatus 30, 40 measures a sum of an interference power and a background-noise power in an output signal from each RAKE receiver. The branch combiner 50 multiplies the output signal from each RAKE receiver by an inverse of the sum measured by the noise-power measuring apparatus, and then adds up the value obtained by each multiplication.

REFERENCES:
patent: 5297171 (1994-03-01), Koch
patent: 5646964 (1997-07-01), Ushirokawa et al.
patent: 5768307 (1998-06-01), Schramm et al.
"A Space-Path Hybrid Diversity Scheme for Base-Station Reception in CDMA Mobile Radio Communication System," Technical Report of IEICE, A P93-29, SAT93-12 (1993-05), The Institute of Electronics, Information and Communication Engineers.

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