| 摘要: |
| 在一个多天线软件无线电平台上实现了基于恒模算法(CMA)的数字波束形成器。利用DSP的EDMA传输方式可以提高数据传输的速率,增加波束形成的实时性。试验结果表明:采用恒模数字波束形成算法,可以使天线主波束对准用户信号到达方向,旁瓣或零陷对准干扰信号达到方向,达到抑制干扰的目的。当采样速率为500 kHz时,在我们的平台上可以实时实现数字波束形成。 |
| 关键词: 智能天线,软件无线电,数字波束形成,恒模算法,数字信号处理器 |
| DOI：10.3969/j.issn.1001-893X. |
| 投稿时间：2007-07-26修订日期：2007-11-20 |
| 基金项目:广东省自然科学基金资助项目(31441)，华南理工大学高水平建设项目(303D76030) |
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| Implementation of DBF Based on CMA in the Multi-antenna SDR Platform |
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| Abstract: |
| A Digital Beam Former(DBF) based on CMA has been implemented in a multi-antenna software defined platform.In order to improve the real time ability of DBF,EDMA data transfer method,which can speed up the data exchange between DSP and FPGA,has been used in the platform.The test result shows that using CMA algorithm,the main narrow beams will be driven directly towards the clusters of users,while at the same time the nulls be steered toward interfering users,so the interference is greatly reduced and the system capacity is improved.Real time implementation of DBF can be achieved in the platform when the sample rate is 500 kHz. |
| Key words: SDR,smart antenna,DBF,CMA,DSP |
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