Pulse or digital communications – Receivers
Reexamination Certificate
2005-07-26
2005-07-26
Fan, Chieh M. (Department: 2634)
Pulse or digital communications
Receivers
C375S346000
Reexamination Certificate
active
06922450
ABSTRACT:
An A/D converter converts the signal received by an array antenna and frequency-converted to a digital signal by a frequency converter. A correlation detector uses the chip rate as a cycle frequency and calculates a cyclic correlation matrix of spread spectrum signals stored in data storage. A cycle frequency detector detects the cycle frequency of an interference signal output from A/D converter. A correlation detector uses the detection result of the cycle frequency detector as a cycle frequency and calculates a cyclic correlation matrix of the signal, which becomes an interference signal, using the signal output from A/D converter. A direction of arrival is estimated, using the cyclic correlation matrices calculated by correlation detector and the correlation detector calculates the respective eigenvalues and eigenvectors and estimates the directions of arrival of a spread spectrum signal and a signal, which becomes an interference signal.
REFERENCES:
patent: 4734701 (1988-03-01), Grobert
patent: 4771289 (1988-09-01), Masak
patent: 4920348 (1990-04-01), Baghdady
patent: 5524023 (1996-06-01), Tsujimoto
patent: 5739788 (1998-04-01), Dybdal et al.
patent: 5761237 (1998-06-01), Petersen et al.
patent: 6349218 (2002-02-01), Nakagawa et al.
patent: 6430239 (2002-08-01), Ferreol
patent: 6470043 (2002-10-01), Lo et al.
patent: 6647276 (2003-11-01), Kuwahara et al.
patent: 11251964 (1999-09-01), None
English Language Abstract of JP 11-251964.
“Detection of Direction and Number of Impinging Signals in array Antenna Using Cyclostationarity” by Hiroyuki Tsuji et al., Collection of Institute of Electronics, Information and Communication Engineers, Jan. 1998 vol. J81-B-II, No. 1, pp. 19-28, and an English language translation of (a portion) Section 3.1.
Fukagawa Takashi
Mimura Masahiro
Nakagawa Youichi
Yuda Yasuaki
Fan Chieh M.
Greenblum & Bernstein P.L.C.
Matsushita Electric Industrial Co. Ltd
Perilla Jason M.
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