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首页> 外文会议>IEEE International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications vol.2; 20050808-12; Beijing(CN) >Phase Noise Mitigation for V-BLAST OFDM system
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Phase Noise Mitigation for V-BLAST OFDM system

机译：V-BLAST OFDM系统的相位噪声缓解

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摘要

Future wireless mobile systems are required to transport multimedia traffics at much higher bit rates. Among all feasible Implementations, V-BLAST OFDM system is one of the most promising candidates for such goal. However, similar to SISO-OFDM, V-BLAST OFDM suffers significant performance degradation due to the presence of phase noise. Although several phase noise mitigation method have been proposed In the literature for SISO channel, none has addressed this MIMO scenario, In which the performance degradation is more severe than SISO as it faces more complicated channel with little diversity gain. Moreover, in the original work of V-BLAST, a large number of antennas (8 transmit and 12 receive antennas) were proposed to obtain high bit rate. This may imply that multiple oscillators would be used to support such system. Most phase noise mitigation methods deal with one oscillator case, while in this paper, by considering the general case for any number of oscillators, we proposed a Phase Noise Mitigation (PNM) scheme, which efficiently reduces the effect of multiple phase noise generated by different oscillators in V-BLAST OFDM system. Although the algorithm developed Is based on Independent MIMO channel, its effectiveness in correlated channel is also numerically evaluated.
机译：需要未来的无线移动系统以更高的比特率传输多媒体业务。在所有可行的实现中，V-BLAST OFDM系统是实现这一目标的最有希望的候选者之一。但是，类似于SISO-OFDM，由于存在相位噪声，V-BLAST OFDM的性能明显下降。尽管在文献中针对SISO信道提出了几种相位噪声缓解方法，但是没有一种方法可以解决这种MIMO方案，在该方案中，性能下降比SISO更为严重，因为它面临着更复杂的信道，且分集增益很小。此外，在V-BLAST的原始工作中，建议使用大量天线（8个发射天线和12个接收天线）来获得高比特率。这可能意味着将使用多个振荡器来支持这种系统。大多数相位噪声缓解方法只处理一种振荡器情况，而在本文中，通过考虑任意数量的振荡器的一般情况，我们提出了一种相位噪声缓解（PNM）方案，该方案可有效降低由不同振荡器产生的多相噪声的影响。 V-BLAST OFDM系统中的振荡器。尽管开发的算法基于独立MIMO信道，但仍会通过数值评估其在相关信道中的有效性。

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