【摘要】 LAS-码(大区域同步码技术)由于具有"零相关窗"或"干扰消除窗",目前受到高度重视。首先分析了LA-码、LS-码和LAS-码的构造、特点和个数问题,然后讨论了LAS-码应用于CDMA2000第三代移动通信系统的方案、拥有的优势与存在的问题,最后对LAS-2000的性能进行仿真分析。结果表明LAS-码在第三代移动通信的增强技术和未来的高速无线数据通信中可以满足ITU对高速业务的性能要求。更多还原

【Abstract】 Large area synchronized code (LAS-code) is considered to be very important in CDMA mobile communications because of its interference free windows(IFW). At first, this paper studies separately the structure feature and number of LA-code, LS-code and LAS-code. Then, the features and the number of these codes are researched. Also, the scheme of application of LAS-code to the third generation mobile communication system CDMA2000 is discussed,and some advantages and problems of this application are analyzed. In the end, the performance results of LAS-2000 in AWGN and Rayleigh channel are simulated. The research shows the important application value of the LAS-code as an enhanced technique in the third generation mobile communication and wireless high speed data communication.更多还原