Radar and other communication systems having large bandwidth and large dynamic range
First Claim
1. A large bandwidth communication system comprising:
- a transmitter system for generating transmit signals over a selectable frequency operating range;
a receiver system having a first mixer for mixing an LO1 signal with received transmit signals;
the receiver system having a first IF system for processing signals received from the first mixer;
a frequency synthesizer system for generating frequency signals for application to at least a transmit mixer in the transmitter and to at least the first mixer in the receiver; and
a control system for selecting and applying a modified frequency value for at least one of plural frequencies including 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 system, with the modified frequency value selected as a function of the system operating frequency and stored spurious amplitude data 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.
2 Assignments
0 Petitions
Accused Products
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.
15 Citations
43 Claims
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1. A large bandwidth communication system comprising:
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a transmitter system for generating transmit signals over a selectable frequency operating range; a receiver system having a first mixer for mixing an LO1 signal with received transmit signals; the receiver system having a first IF system for processing signals received from the first mixer; a frequency synthesizer system for generating frequency signals for application to at least a transmit mixer in the transmitter and to at least the first mixer in the receiver; and a control system for selecting and applying a modified frequency value for at least one of plural frequencies including 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 system, with the modified frequency value selected as a function of the system operating frequency and stored spurious amplitude data 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A large bandwidth communication system comprising:
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means for transmitting transmit signals over a selectable frequency operating range; means for receiving the transmit signals having a first mixer for mixing an LO1 signal with the transmit signals; the receiving means having a first IF system for processing signals received from the first mixer; means for generating frequency signals for application to at least a transmit mixer in the transmitting means and to at least the first mixer in the receiver; means for controlling the transmitting and receiving means to select and apply a modified frequency value for at least one of plural frequencies including 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 system, with the modified frequency value selected as a function of the system operating frequency and stored spurious amplitude data 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. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A method for operating a large bandwidth communication system having a transmitter and a receiver comprising the steps of:
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operating the transmitter to transmit signals over a selectable frequency operating range; operating the receiver to receiver the transmit signals through a first mixer which mixes an LO1 signal with the received transmit signals; operating a first IF system in the receiver to process signals received from the first mixer; generating frequency signals for application to at least a transmit mixer in the transmitter and to at least the first mixer in the receiver; and selecting and applying a modified frequency value for at least one of plural frequencies including 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 system, with the modified frequency value selected as a function of the system operating frequency and stored spurious amplitude data 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. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43)
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Specification