期刊文献+

一种适用于SF-OFDM系统的波束形成技术

A Beamforming Technique for Space-Frequency OFDM Systems
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摘要 在正交频分复用(OFDM)系统中使用空频传输分集是未来宽带无线通信中的重要技术。由于在各个终端采用多天线进行收发,导致使用空频-OFDM(SF-OFDM)传输分集的系统受到增强的共信道干扰(CCI)。本文提出了一种适用于SF-OFDM系统的波束形成方案,该方案能有效的抑制共信道干扰。在该方案中,基于盲转向的波束形成被应用于SF-OFDM系统中。分析和仿真结果表明,该方案具有良好的共信道干扰抑制能力。此外,该方案能够利用不同波达角(DOA)信号间的相对时延来增强系统性能。 Space-frequency transmitter diversity technique for orthogonal frequency division multiplexing (OFDM) is a promising scheme for future wideband wireless communication systems. The system employing space-frequency OFDM (SF- OFDM) transmitter diversity technique suffers enhanced co-channel interference (CCI) due to the use of multiple transmitters at each mobile. We propose a beamforming method for the cancellation of CCI in the SF-OFDM system. The performance of the beamformer based on null-steering has been investigated. Simulation results show that the proposed method has a good CCI cancellation ability. Meanwhile, the system performance can be enhanced by using the time delays of the signals from different direction of arrivals (DOAs).
出处 《微波学报》 CSCD 北大核心 2007年第5期64-69,共6页 Journal of Microwaves
基金 国家自然科学基金资助项目(60371017)
关键词 波束形成 共信道干扰 正交频分复用 空频分集 Beamforming, Co-channel interference, OFDM, Space-frequency diversity
作者简介 刘洪武1975年生,男,四川乐山人。博士研究生。主要研究方向为智能天线与电波传播。 冯全源1963年生,男,江西景德镇人,博士生导师。主要研究方向:现代天线理论及应用,微波器件及材料,电磁兼容等。
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参考文献12

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