Communications: directive radio wave systems and devices (e.g. – Directive – Utilizing correlation techniques
Patent
1993-06-08
1995-01-03
Issing, Gregory C.
Communications: directive radio wave systems and devices (e.g.,
Directive
Utilizing correlation techniques
455 65, 4552781, 455303, G01S 316, H04B 100, H04B 110
Patent
active
053790464
ABSTRACT:
An interference wave removing apparatus removing interference wave between angle diversity branches is disclosed. This apparatus is suitable for microwave communication beyond line-of-sight. The apparatus comprises a first reception unit for main beam, a second reception unit for angle beam, a first correlator for generating a first correlation signal corresponding to the first reception unit, a second correlator for generating a second correlation signal corresponding to the second reception unit, a first multiplier for multiplying an output of the first reception unit and the first correlation signal, a second multiplier for multiplying an output of the second reception unit and the second correlation signal, a subtractor for subtracting an output of the first multiplier from an output of the second multiplier, a channel quality compensator for compensating for an output of the subtractor for the channel quality, and a delay element for delaying an output of the channel quality compensator. The second reception unit can be adjusted a directivity for the angle beam and is controlled to follow up the angle beam in response to an output of the delay element.
REFERENCES:
patent: 3681695 (1972-08-01), Cease et al.
patent: 4752969 (1988-06-01), Rilling
R. T. Compton Jr., "The Power-Inversion Adaptive Array: Concept and Performance", IEEE Transaction on Aerospace and Electronic Systems, vol. AES-15, No. 6, pp. 803-814, Nov. 1979.
K. Pahlavan and J. W. Matthews, "Performance of Adaptive Matched Filter Receivers Over Fading Multipath Channels", IEEE Transaction on Communications, vol. 38, No. 12, pp. 2106-2113, Dec. 1990.
Issing Gregory C.
NEC Corporation
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