Interference cancellation system and radio system for multiple r

Details Interference cancellation system and radio system for multiple r Interference cancellation system and radio system for multiple r

1994-05-12

1996-11-12

Eisenzopf, Reinhard J.

Telecommunications

Transmitter and receiver at separate stations

Distortion, noise, or other interference prevention,...

455673, 455 82, 455 83, 455296, 455303, H04B 110, H04B 1500

Patent

active

055749780

ABSTRACT:
A radio system and interference cancellation system for use with the radio system include a receiving radio and a transmitting radio which are coupled to a common antenna. A reference coupler provides a reference signal in response to the signal transmitted by the transmitting radio and provides the reference signal to a vector modulator and a synchronous detector. A receiver coupler is responsive to the transmitted signal which is reflected by the antenna and to the signal which is desired to be received and provides a received signal containing an interfering signal component and a desired signal component. An error coupler samples the received signal which includes any residual interfering signal component after cancellation, and provides an error signal to the synchronous detector. The synchronous detector compares the reference signal with the error signal and provides a detector output to the vector modulator. The vector modulator adjusts the phase and amplitude of the reference signal and generates a cancellation signal from the reference signal, which cancellation signal is summed with the received signal to cancel the interfering signal component, leaving the desired signal.

REFERENCES:
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patent: 5054114 (1991-10-01), Erickson
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patent: 5428831 (1995-06-01), Monzello et al.
Rabindra N. Ghose, "Collocation of Receivers and High-Power Broadcast Tranmitters", IEEE Transactions on Broadcasting, vol. 34, No. 2: 154-158 (Jun. 1988).

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