Radar and other communication systems having large bandwidth and

Details Radar and other communication systems having large bandwidth and Radar and other communication systems having large bandwidth and

1994-07-21

1995-11-14

Sotomayor, John B.

Communications: directive radio wave systems and devices (e.g.,

Clutter elimination

342 99, 342100, 342101, 342161, 342162, G01S 13524

Patent

active

054670918

ABSTRACT:
A large bandwidth communication system has a transmitter to transmit signals over a selectable frequency operating range and a receiver having a first mixer for mixing an LO1 signal with received transmit signals. The receiver has a first IF for processing signals received from the first mixer. A frequency synthesizer generates frequency signals for application to at least a transmit mixer in the transmitter and to at least the first mixer in the receiver. A computer system selects and applies a modified frequency value to at least one of plural frequencies used in the system that of the LO1 signal applied to the first mixer, that of a frequency signal applied to the transmit mixer, and an IF frequency of the first IF, with the modified frequency value selected as a function of the system operating frequency and stored spurious amplitude data so as to sidestep spurious signals in portions of the total system frequency operating bandwidth where spurious amplitudes are excessive and otherwise would interfere with quality reception.

REFERENCES:
patent: 3676684 (1972-07-01), De Lange
patent: 3984675 (1975-10-01), Corcoran et al.
patent: 4725786 (1988-02-01), Papaieck
patent: 4866466 (1989-09-01), Hellsten
patent: 5155741 (1992-10-01), Waters et al.
patent: 5166629 (1992-11-01), Watkins et al.
patent: 5235455 (1993-08-01), Berry et al.
patent: 5339187 (1994-08-01), Nelson
patent: 5374903 (1994-12-01), Blanton

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