Steerable nulling of wideband interference signals

Details Steerable nulling of wideband interference signals Steerable nulling of wideband interference signals

1998-10-08

1999-07-20

Hellner, Mark

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

Directive

Utilizing correlation techniques

342 17, G01S 316, G01S 736

Patent

active

059261358

ABSTRACT:
Apparatus for steerable nulling of a radiation pattern of a main lobe and at least one side lobe with at least one null point produced by an antenna array of n elements relative to wideband radio frequency signals having a carrier wave modulated with pulse signals, while receiving the radio frequency signals from, or transmitting to, a desired station and at least one interfering station. An interference rejection processor (IRP) that has n inputs, each connected to a respective element of the antenna array, is connected between the receiver or transmitter and the antenna array. The IRP steers the effect of the antenna radiation pattern such that the at least one null point substantially corresponds to the reception of the radio frequency signal from, or transmission to, the interfering station. The antenna array has an aperture bandwidth, E, such that the IRP is implemented using only phase delay of the radio frequency signals to steer the radiation pattern.

REFERENCES:
patent: 5363111 (1994-11-01), Murphy
patent: 5371506 (1994-12-01), Yu et al.
patent: 5422908 (1995-06-01), Schilling

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