Multiple access cellular communication with signal cancellation

Details Multiple access cellular communication with signal cancellation Multiple access cellular communication with signal cancellation

1995-09-29

1998-06-16

Safourek, Benedict V.

Multiplex communications

Crosstalk suppression

370337, 455452, 455501, H04Q 730, H04J 310

Patent

active

057682542

ABSTRACT:
A method and system for reducing co-channel interference (CCI) in multiple access communication by providing complete or partial cancellation of a mixed CCI interfering signal in a system base station. An exemplary system includes first and second base stations communicating with users in first and second cells, respectively. The first base station transmits a downlink signal to a user in the first cell. The downlink signal is also a mixed CCI interfering signal in that it interferes with reception of an uplink signal in the second base station. A cancellation signal representative of the interfering signal is supplied along a transmission path from the first base station to the second base station. The second base station utilizes the cancellation signal to reduce the effect of the interfering signal on a received composite signal by, for example, combining the cancellation signal or a suitably processed version thereof with the received composite signal. Other aspects of the invention involve reducing mixed CCI by providing non-uniform quality of service, by dropping potentially interfering packets, or by full or partial circular interleaving of packet slot assignments.

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