【作者】 叶剑锋；

【导师】 庞伟正；

【作者基本信息】 哈尔滨工程大学 ， 信号与信息处理， 2004， 硕士

【摘要】 所谓智能天线技术就是自适应天线阵列和空时二维处理相结合，形成同时具有空时处理能力的天线。其基本思想是利用各个移动用户间信号空间特征的差异，通过阵列天线技术在同一信道上接受和发送多个用户信号而不发生相互干扰，实际上它使通信资源不再局限于时间域(TDMA)、频率域(FDMA)或码域(CDMA)而拓展到了空间域，属于空分多址(SDMA)体制。在无线通信系统中采用智能天线技术，可以提高系统数据链路的质量，提高基站天线的覆盖范围，并抑制同信道干扰和媒介干扰，可以有效的提高通信系统的性能和容量。空时二维处理不仅是智能天线技术的核心，而且也是第三代无线通信系统信号处理的关键部分。目前该技术已成为国内外非常热门的研究领域。 本文以目前通信信号处理领域的热点：空时二维处理为研究方向，对于空时二维处理在CDMA移动通信系统中的应用，即空时二维RAKE接收机、最优空时多用户检测、空时盲多用户检测进行了研究，并给出相应的计算机仿真结果。 本文在深入研究空时二维处理在CDMA移动通信系统中的应用基础之上，有所改进，从而使CDMA移动通信系统的性能得到了进一步改善。更多还原

【Abstract】 The Smart Antenna technique is the combination of adaptive antenna array with Space-Time Processing, which can deal with signal in space area and time area. Its basic thought is that we can receive and transmit a lot of different user’ s signal on the same way without interference by the different space characteristic of the every mobile user. In reality it make correspond by letter the resources to no longer limit at time area(TDMA), frequency area(FDMA) or code area(CDMA) but expanded to the space area, belongs to space division(SDMA) system. We can not only improve the base antenna coverage, system capacity and service quality , but also reduce the inter-symbol interfere , multiaccess interfere and transmitting power by the use of the Smart Antenna technique in wireless communication . Space-time processing is not only the core of the Smart Antenna technique, but also the key of signal processing in the third generation of wireless communication system. It has been the present focuses in signal processing and communication field .In this dissertation , space-time RAKE receiver , the best space-time multi-user detection and blind space-time multi-user detection are studied .On the basis of the research of space-time processing in CDMA Mobile Communication System, some improved techniques will be employed , and then the performance of the CDMA system can be enhanced further.更多还原