论文标题:多输入多输出智能天线中的自适应波束形成算法研究
A Research on Adaptive Beamforming Algorithms for MIMO Smart Antennas
论文作者 陈永红
论文导师 姜永权,论文学位 硕士,论文专业 信号与信息处理
论文单位 汕头大学,点击次数 126,论文页数 58页File Size2231k
2004-05-20论文网 http://www.lw23.com/lunwen_204775662/ 智能天线; MIMO系统; 自适应波束形成算法
smart antenna, MIMO system, adaptive beamforming algorithm
在移动通信技术的发展中，智能天线已成为一个最活跃的领域之一。目前，国际上已经将智能天线技术作为3G技术发展的主要方向之一。 采用智能天线技术，可以降低同信道干扰，增加系统容量。智能天线实现的关键在于自适应算法的选择。近来，我们发现采用多输入多数出(MIMO)技术能够有效地提高信道的利用率。采用MIMO技术的智能天线系统在基站(BS)和移动台(MS)同时采用自适应多天线阵列，因此，采用MIMO技术能大幅度提高无线通信系统的容量。基于传统的LMS算法，本文提出了一种新的MIMO智能天线自适应波束形成算法，即LMS-MIMO算法。与仅在接收端采用智能天线的传统LMS算法相比，本文提出的算法在发射端和接收端同时采用了智能天线技术。仿真结果表明，LMS-MIMO算法的性能明显优于仅在接收端采用自适应波束形成技术的传统LMS算法。并且，随着发射和接受天线阵元数目的增加，系统性能进一步改善。
In the course of mobile communication technology development, Smart Antenna(SA) has been one of most active fields. At present, SA technology has been admitted as one of main new technologies in 3G mobile communication systems. To use SA technology can reduce common channels interference and increase communication system capability. Selection of adaptive algorithms is the key in course of SA realization. Recently, multi-input multi-output(MIMO) appears very promising for more efficient use of channel. The MIMO SA system uses the array antennas both at the base station(BS) and mobile station(MS). Consequently, the use of MIMO technology could dramatically increase the channel capacity of wireless communications. In this paper, a novel MIMO algorithm, namely LMS-MIMO, was present, which is intended to use the conventional LMS technology for the problem solving. Compared with conventional LMS algorithm adopting SA only at the receiver part, the proposed algorithm adopts SA not only at the receiver part but also at the transmitter part.Results of simulation reveal that the performance of LMS-MIMO algorithm is much better than the conventional LMS algorithm adopting SA only at the receiver part. The performance also improves as the array antennas at transmitter and receiver have more elements.
|
