双极化阵列下行波束形成中上行估计的性能分析

B. Lindmark, M. Ahlberg, M. Nilsson, C. Beckman
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引用次数: 2

摘要

当前和未来的移动通信系统大多是频率双工系统,即上行链路和下行链路在频率上是分离的。由于无线电信道的影响不随频率而变化,这可能会限制使用自适应天线的容量增益。我们使用150 MHz的测量数据来模拟郊区环境中的自适应波束形成。来自1741 MHz上行链路的信息用于该频率的波束形成以及1839 MHz下行链路上的波束形成。我们的结果表明,在上行链路和下行链路之间,C/I改进减少了高达10 dB。
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Performance analysis of applying up-link estimates in the down-link beamforming using a dual polarized array
Most of the current and future mobile communications systems are frequency duplex systems, i.e. the up- and down-link are separated in frequency. Since the effect of the radio channel is not constant with frequency, this potentially limits the capacity gain using adaptive antennas. We use 150 MHz measurement data to simulate adaptive beamforming in a suburban environment. The information from the up-link at 1741 MHz is used for beamforming at this frequency as well as on the down-link at 1839 MHz. Our results show a reduction in C/I improvement of up to 10 dB between the up- and down-link.
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