Test equipment for simulating multipath interference

Details Test equipment for simulating multipath interference Test equipment for simulating multipath interference

1985-04-02

1987-07-07

Griffin, Robert L.

Telecommunications

Receiver or analog modulated signal frequency converter

Measuring or testing of receiver

455 65, 455 67, 324 57N, H04B 1700

Patent

active

046792481

ABSTRACT:
The invention relates to a device for simulating multipath interference in order that the correction stages of a radio receiver can be tested. The device includes parallel paths, simulating the multipath environment, and a pilot tone generator for introducing pilot tone into the paths. A feedback loop continuously adjusts the phase and amplitude of segments in the paths so as to cancel pilot tone from the output whereby the loop maintains the adjustment need for maximum attenuation at the frequency of the pilot tone.

REFERENCES:
patent: 3471855 (1969-10-01), Thompson
patent: 3863155 (1975-01-01), Cornell
patent: 4317214 (1982-02-01), Attinello
Systems Technology, "Applications of an Interference Cancellation Technique to Communications and Radar Systems", pp. 38-47 by T. A. Bristow.

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