Adaptive transmitting antenna

Details Adaptive transmitting antenna Adaptive transmitting antenna

1996-12-03

1998-07-14

Vo, Nguyen

Telecommunications

Transmitter and receiver at separate stations

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

455 63, 455103, 455504, 342380, 342383, 375296, 375343, H04B 701

Patent

active

057818452

ABSTRACT:
An adaptive transmitting antenna includes an array of antenna elements having respective weighing coefficients to respectively transmit components of a transmit signal which reduces locally reflective multipath signals received by the transmitting antenna to sample respective reflective components which are summed and cross correlated to a time delayed transmit signal to produce a correlated output indicative of the reflective signal strength. The correlated output is minimized by adjusting the weighing coefficients so that the transmit signal has reduced multipath distortions. The adaptive technique is well suited for mobile telephone transmitters moving about objects tending to reflect and distort transmitted signals.

REFERENCES:
patent: 4567602 (1986-01-01), Kato et al.
patent: 5028931 (1991-07-01), Ward
patent: 5471647 (1995-11-01), Gerlach et al.

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