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首页> 外文期刊>Communications, IEEE Transactions on >Capacity of SIMO and MISO Phase-Noise Channels With Common/Separate Oscillators
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Capacity of SIMO and MISO Phase-Noise Channels With Common/Separate Oscillators

机译：带有共用/独立振荡器的SIMO和MISO相位噪声通道的容量

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摘要

In multiple antenna systems, phase noise due to instabilities of the radio-frequency (RF) oscillators, acts differently depending on whether the RF circuitries connected to each antenna are driven by separate (independent) local oscillators (SLO) or by a common local oscillator (CLO). In this paper, we investigate the high-SNR capacity of single-input multiple-output (SIMO) and multiple-output single-input (MISO) phase-noise channels for both the CLO and the SLO configurations. Our results show that the first-order term in the high-SNR capacity expansion is the same for all scenarios (SIMO/MISO and SLO/CLO), and equal to , where stands for the SNR. On the contrary, the second-order term, which we refer to as phase-noise number, turns out to be scenario-dependent. For the SIMO case, the SLO configuration provides a diversity gain, resulting in a larger phase-noise number than for the CLO configuration. For the case of Wiener phase noise, a diversity gain of at least can be achieved, where is the number of receive antennas. For the MISO, the CLO configuration yields a higher phase-noise number than the SLO configuration. This is because with the CLO configuration one can obtain a coherent-combining gain through maximum ratio transmission (a.k.a. conjugate beamforming). This gain is unattainable with the SLO configuration.
机译：在多天线系统中，由于射频（RF）振荡器的不稳定性而导致的相位噪声的作用不同，具体取决于连接到每个天线的RF电路是由单独的（独立的）本地振荡器（SLO）还是由共用的本地振荡器驱动（CLO）。在本文中，我们研究了针对CLO和SLO配置的单输入多输出（SIMO）和多输出单输入（MISO）相位噪声通道的高SNR容量。我们的结果表明，在所有情况下（SIMO / MISO和SLO / CLO），高SNR容量扩展中的一阶项都是相同的，并且等于，其中代表SNR。相反，二阶项（我们称为相位噪声数）证明是与场景有关的。对于SIMO情况，SLO配置提供了分集增益，从而导致比CLO配置更大的相位噪声数。对于维纳相位噪声，至少可以实现分集增益，这里是接收天线的数量。对于MISO，CLO配置比SLO配置产生更高的相位噪声数。这是因为通过CLO配置，可以通过最大比率传输（又称为共轭波束成形）获得相干合并增益。使用SLO配置无法获得此增益。

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