Basic Study towards a Multi-media Microcellular Personal Communication System

多媒体微蜂窝个人通信系统的基础研究

基本信息

批准号：
04452184
负责人：
YOSHIDA Susumu
金额：
$ 3.78万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1992
资助国家：
日本
起止时间：
1992 至 1993
项目状态：
已结题

项目摘要

Basic research towards the next generation multi-media personal communications has been performed. Major research results during 1992-1993 are summarized below.1. Based on the theoretical analysis and computer simurations, optimum carrier to co-channel interference ratio (C/I) maximizing the packet transmission throughput per unit cell and also an optimum cluster size have been clarified for a broadband cellular system subjected to multiupath fading.2. A new dynamic channel allocation algorithm with transmitter power control is proposed. It tries to allocate a channel to which subsequent power control can be applied most effectively. By properly selecting the power control range, this alogorithm has been confirmed to realize very low transmitter power, without sacrificing other perfomance compared to conventional algorithms.3. A simulation system to evaluate the reconstructed picture quality of the highly compressed still image when transmitted over a multipath fading channel has been developed. An unequal error protection scheme, which assigns more parity check bits for error correction to the more important infomation, has been applied to the JPEG-like still picture transmission, and shown to be very effective to improve the picture quality when the total bit rate is fixed.4. An automatic repeat request (ARQ) error control protocol which utilizes the redundancy of the still picture itself has been proposed and shown to be very effctive to improve the picture quality when transmitted over a fading channel.5. As an optimum receiver for the mobile radio channel with large multipath delay and co-channel interference, we proposed an extended MLSE equalizer with an enhanced co-channel cancelling capability by trellis coded modulation, and confirmed its superior performance.

已经进行了下一代多媒体个人交流的基础研究。 1992 - 1993年期间的主要研究结果总结为1。基于理论分析和计算机模拟，最佳载体与横渠干扰比（C/I）最大化每个单位单元的数据包传输吞吐量以及最佳簇大小，以实现多个多质量淡化的宽带蜂窝系统。2。提出了具有发射机功率控制的新的动态通道分配算法。它试图分配一个可以最有效地应用的通道。通过正确选择功率控制范围，已确认该alogorithm能够实现非常低的发射器功率，而与常规算法相比，没有牺牲其他性能。3。已经开发了一个模拟系统，以评估通过多径褪色通道传输时高度压缩静止图像的重建图像质量。不平等的错误保护方案为更重要的信息分配了更多的奇偶校验检查位，以纠正更重要的信息，已应用于类似JPEG的静态图像传输，并且在固定总比特率时非常有效地提高图像质量。4。已经提出了使用静止图片本身的冗余的自动重复请求（ARQ）错误控制协议，并证明在通过褪色通道传输时非常效率以提高图像质量。5。作为具有大型多路径延迟和共通中干扰的移动无线电通道的最佳接收器，我们提出了一个扩展的MLSE均衡器，并通过Trellis编码的调制具有增强的共沟通道取消功能，并确认了其出色的性能。