Communications: directive radio wave systems and devices (e.g. – Directive – Utilizing correlation techniques
Patent
1998-08-27
2000-05-16
Tarcza, Thomas H.
Communications: directive radio wave systems and devices (e.g.,
Directive
Utilizing correlation techniques
342383, G01S 316
Patent
active
060643382
ABSTRACT:
An array antenna system of a wireless base station in CDMA mobile communications combines signals, which have been received by a plurality of antenna elements of an array antenna, upon subjecting the signals to amplitude and phase-rotation control, and despreads the combined signal. A searcher has matched filters which apply correlation operations to output signals from respective antenna elements to thereby calculate correlation signals that are correlated with a signal transmitted from a mobile station of interest. An adaptive weight calculating unit calculates adaptive weights for obtaining in-phase correlation signals from the respective antenna outputs. A beam former multiplies, by the adaptive weights, output signals from the corresponding antenna elements and combines the resulting products to output a combined signal. The combined signal is found for each path of multipaths and is input to a Rake receiver, which proceeds to identify data.
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patent: 5812542 (1998-09-01), Bruckert et al.
patent: 5859842 (1999-01-01), Scott
patent: 5893033 (1999-04-01), Keskitalo et al.
Kobayakawa Shuji
Seki Hiroyuki
Tanaka Yoshinori
Tsutsui Masafumi
Fujitsu Limited
Phan Dao L.
Tarcza Thomas H.
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