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US 2018/0123633 A1Published application
System and method for passive intermodulation identification using cyclostationary signals
AssigneeCommScope Technologies LLC
InventorsThomas B. Gravely, Martin C. Alles, Andrew E. Beck, Navin Srinivasan
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Abstract
The present disclosure describes systems and methods for determining intermodulation distortion in a system such as, but not limited to, a communication system. In an embodiment, intermodulation distortion is determined by injecting a signal into a frequency band which interacts with a second signal, searching a second frequency band for a product signal formed from the first and second signals, applying a cyclostationarity detection technique to the product signal and identifying the product signal as an intermodulation distortion signal.
Claims30
A method for determining intermodulation distortion, the method comprising:
- (a) transmitting in a predetermined first frequency band of a communication system a first signal at a predetermined first frequency and having a predetermined first cyclostationary attribute, wherein said predetermined first frequency band includes a second signal at a second frequency different from said predetermined first frequency, wherein said first signal is not a communication signal associated with said communication system, and wherein said second signal is a communication signal associated with said communication system;
- (b) searching a second frequency band of said communication system for a product signal, wherein said product signal is a product of said first signal raised to the power of a first integer and said second signal raised to the power of a second integer, and wherein said product signal is at a third frequency which is different from both said predetermined first frequency and said second frequency;
- (c) applying a predetermined cyclostationarity detection technique to said product signal;
- and
- (d) identifying said product signal as an intermodulation distortion signal from the application of the predetermined cyclostationarity detection technique to said product signal.
2 more elements
A method for determining intermodulation distortion, the method comprising:
- (a) transmitting in a predetermined first frequency band of a communication system a first signal at a predetermined first frequency and having a predetermined first cyclostationary attribute, wherein said first signal is not a communication signal associated with said communication system;
- (b) transmitting in said predetermined first frequency band a second signal at a predetermined second frequency different from said predetermined first frequency, wherein said second signal is not a communication signal associated with said communication system;
- (c) searching a predetermined second frequency band of said communication system for a product signal, wherein said product signal is a product of said first signal raised to the power of a first integer and said second signal raised to the power of a second integer, and wherein said product signal is at a third frequency which is different from both said predetermined first frequency and said predetermined second frequency;
- (d) applying a predetermined cyclostationarity detection technique to said product signal;
- and
- (e) identifying said product signal as an intermodulation distortion signal from the application of the predetermined cyclostationarity detection technique to said product signal.
3 more elements
A method for determining intermodulation distortion, the method comprising:
- (a) transmitting in a predetermined first frequency band of a communication system a first signal at a predetermined first frequency, wherein said predetermined first frequency band includes a second signal at a second frequency different from said predetermined first frequency, and wherein said second signal includes a cyclostationary attribute, and wherein said first signal is not a communication signal associated with said communication system, and wherein said second signal is a communication signal associated with said communication system;
- (b) searching a second frequency band of said communication system for a product signal, wherein said product signal is a product of said first signal raised to the power of a first integer and said second signal raised to the power of a second integer, and wherein said product signal is at a third frequency which is different from both said predetermined first frequency and said second frequency;
- (c) applying a predetermined cyclostationarity detection technique to said product signal;
- and
- (d) identifying said product signal as an intermodulation distortion signal from the application of the predetermined cyclostationarity detection technique to said product signal.
2 more elements
Dependencies are inferred from the claim text.