| 摘要 |
A technique for using downlink smart antennas at the base station increases gain and improves directivity in the downlink channel thereby improving mobile signal quality, mitigating downlink multipath, improving frequency reuse, and reducing interference to other users. The smart antenna downlink technique of the present invention does not require changes to the IS-54/IS-136 Time Division Multiple Access air interference standard or to the mobiles. According to the present invention, in a wireless communication system, a method for communicating between a base station and a plurality of users includes using the same antenna pattern for transmission to all users, and adjusting the antenna pattern to improve the performance measure of the system. In this case, the performance measure can include the bit error rate, the received signal strength, and/or co-channel interference measurements. A fixed multibeam antenna and power control is used to optimize the downlink antenna pattern to each user. As a result, greater coverage is obtained and less co-channel interference is experienced. |
