H - Electricity – 04 – B
Patent
H - Electricity
04
B
363/10, 344/13
H04B 7/26 (2006.01) H04B 7/005 (2006.01) H04Q 7/26 (2006.01)
Patent
CA 1257416
- 16 - A WIRELESS PBX/LAN SYSTEM WITH OPTIMUM COMBINING Abstract A wireless PBX or LAN system is disclosed that allows multiple, simultaneous users per channel for communication between a base station and a plurality of remote terminals by a combination of adaptive signal processing arrays using optimum combining at the base station for interference suppression and separation of desired signals, adaptive power control at the remote terminals to keep interference at acceptable levels, and adaptive retransmission with time division in the direction from the base station to the remote terminals for communication therebetween including sending power control information to the remote terminals. The adaptive signal processing arrays have a plurality of antennas at the base station, permitting a plurality of users in any one channel. If after adaptation a user's signal cannot be received adequately, the user is dynamically reassigned to a different channel. Interference is minimized by keeping the signals transmitted from and received at the base station at the same power level. The received signals are kept at the same power level by extracting information about the power level of the signals received at the base station and by sending power control bits back to the corresponding remote terminal so that the signal level from the remote terminal may be adjusted either up or down until the power level of each of the signals received at the base station is at the same level. The transmitted signls are kept at the same power level by adaptive retransmission with time division.
496464
American Telephone And Telegraph Company
Kirby Eades Gale Baker
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