User-Identification Position-Sensing Asynchronous CDMA Communication System Using Finite-Length PN-Sequences

使用有限长度 PN 序列的用户识别位置传感异步 CDMA 通信系统

基本信息

批准号：
18560378
负责人：
TANADA Yoshihiro
金额：
$ 2.36万
依托单位：
Yamaguchi University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2006
资助国家：
日本
起止时间：
2006 至 2007
项目状态：
已结题

项目摘要

In the ad hoc network or sensor network, a technique to identify a signal sender and simultaneously to sense the position of the sender is desired. This project aimed to develop an asynchronous CDMA communication and position-sensing system using finite-length PN sequences. The achievements of the research are as the followings.(1) Research on real-valued finite-length sequences For this system, a sequence set to bring high transmission efficiency has been developed. For user's selective formation of wireless network, other sequence pairs with impulsive correlation are investigated, to bring a little lower transmission efficiency.(2) Development of multiplexing communication system The communication system for 4 users allotted by real-valued sequences of length 65 has been developed to transmit two-valued modulated signal from multi-rate data and to demodulate the data with interference, noise and amplitude distortion suppressed through correlation processing. This system has high efficiency of frequency usage and the stronger tolerance with amplitude distortion than the OFDM system (as adopted to terrestrial TV system).(3) The position sensing system has been developed to calculate the position by intersecting the hyperbolas derived from distance differences between a transmitting antenna and three Deceiving antennas placed on the apex of a triangle. The accuracy of detected position depends on the distances between the antennas and on the time interval of system clock.The developed system for detecting the person or object possessing a code and communicating with each is a proposal. The future subject is the research and development of improvements for practical use.

在临时网络或传感器网络中，一种同时识别信号发件人的技术，以感知发件人的位置。该项目旨在使用有限的PN序列开发异步的CDMA通信和位置感应系统。（1）对该系统的实数有限长度序列进行研究，已经开发了高传输效率的序列。对于用户对无线网络的选择性形成，研究了具有冲动性相关性的其他序列对，以带来较低的传输效率。（2）多路复用通信系统的开发为4个用户提供了由长度65分配的4个用户的通信系统，以通过多种构造数据和校正范围的噪声和噪声，噪声和噪声，从而传递从多重造成数据的两次调制信号进行传递，以传递两种调节的信号。该系统的频率使用效率高，并且比OFDM系统（对陆地电视系统采用）具有振幅失真的较高耐受性。（3）（3）已经开发了位置传感系统来计算位置，从而通过将距离从距离的天线和三个欺骗性天线置于Triangle的顶点上的Transmantnna和三个欺骗性天线之间得出的倍增倍数。检测到位置的准确性取决于天线之间的距离和系统时钟的时间间隔。开发的用于检测具有代码并与每个代码的对象的系统或对象是一项建议。未来的主题是对实际使用的改进的研究和开发。