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Project on CDMA and Array Antennas for Mobile Communications

移动通信用 CDMA 和阵列天线项目

基本信息

批准号：
10044142
负责人：
KOHNO Ryuji
金额：
$ 3.78万
依托单位：
Yokohama National University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B).
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 1999
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10044142/
关键词：
Mobile Communications Multimedia Communications Adaptive Array Antenna CDMA Spread Spectrum Communications Spatial and Temporal Signal Processing Interference Rejection

项目摘要

The aim of this study is to international cooperation between Japan and Europe in fields of adaptive array antennas and CDMA (Code Division Multiple Access) based on spread spectrum technique in order to provide extremely useful countermeasures to overcome a lack of frequency spectrum due to rapid increase of demands in wireless communications such as mobile communications. For instance, in a CDMA technique, (1) The way of leading the optimization criterion of the communication quality evaluation of the multimedia and modeling the wireless communication channel, (2) Proposal of a method of measuting traffic variance of multimedia CDMA wireless communication systems and a method of adaptive controlling the processing gain and transmission power for individual media, (3) Proposal of the signal processing in space and time domains based on adaptive digital filter and adaptive array antenna for rejection to narrow band interference and fading. Second, in a array antenna, (1) Modeling of time-varying multipath fading channel in space and time domains, (2) Analysis of improvement of frequency efficiency based on application of adaptive array antennas, (3) Proposal and analysis of space and time optimum equalizer, receiver, channel coding and decoding, (4) Proposal and evaluation of adaptive array antenna architectures and adaptive algorithms, (5) Application and performance analysis to CDMA environment.

本研究的目的是在自适应阵列天线和基于扩频技术的CDMA（码分多址）领域开展日本和欧洲之间的国际合作，以便提供非常有用的对策，以克服由于移动的通信等无线通信需求的快速增长而导致的频谱短缺。例如，在CDMA技术中，（1）引导多媒体通信质量评估的优化准则和对无线通信信道建模的方法，（2）提出测量多媒体CDMA无线通信系统的业务量方差的方法和自适应控制各个媒体的处理增益和发送功率的方法，（3）提出了基于自适应数字滤波器和自适应阵列天线的空、时域信号处理方法，以抑制窄带干扰和衰落。第二，在阵列天线中，（1）时变多径衰落信道的空间和时间域建模，（2）基于自适应阵列天线应用的频率效率改进的分析，（3）空间和时间最佳均衡器、接收机、信道编码和解码的提出和分析，（4）自适应阵列天线结构和自适应算法的提出和评估，（5）CDMA环境下的应用及性能分析。