English

应用科学学报 ›› 2002, Vol. 20 ›› Issue (4): 404-408.

• 论文 • 上一篇    下一篇

一种新型八相时空调制扩频通信定位综合系统

宋茂忠, 许宗泽   

  1. 南京航空航天大学信息科学与技术学院, 江苏南京 210016
  • 收稿日期:2001-10-13 修回日期:2002-02-01 出版日期:2002-12-31 发布日期:2002-12-31
  • 作者简介:宋茂忠(1962-),男,安徽歙县人,教授;许宗泽(1940-),男,江苏常州人,教授,博导.
  • 基金资助:
    国家自然科学基金资助项目(69972018)

A New Integrated Spread-Spectrum System of Communication and Wireless Location with Eight Phases Space-Time Modulation

SONG Mao-zhong, XU Zong-ze   

  1. College of Information Science and Technology, Nanjing University of Aeronautics & Astronautics, Nanjing 210016, China
  • Received:2001-10-13 Revised:2002-02-01 Online:2002-12-31 Published:2002-12-31

PDF

97

被引次数

18

摘要： 为了在通信的同时测定用户位置,提出了一种新颖的八相时空调制扩频技术,它利用含有方位信息的八相信号状态,实现直接序列扩频时空调制.调制信号的频谱和通信能力与扩频QPSK相同,但可以测得接收机方位,更适于通信定位综合系统.文中巧妙地利用了正交矩阵、沃尔氏序列与其交替倒相序列正交的特性,解决了信号的编码、调制、发射、解扩、载波提取和方位角估计等关键技术问题,分析了误码和测角性能.

关键词: 调制技术, 测向, 无线定位, 扩频系统, 移动通信

Abstract: To meet the challenge of future mobile communication and integrated communication and wireless location systems, a new spread spectrum communication system with eight phases space-time modulation technology is proposed to transmit azimuth and communication message. The spectrum, capacity and bit error rate of this system are similar to the spread-spectrum QPSK. The paper suggests a method of matrix to describe the principle of modulation. The key technical problems such as modulation, transmitting array antennae, demodulation, carry recover and direction-finding are solved, by taking into consideration the orthogonal metrics and the fact that a walsh sequence wn is orthogonal to (-1) n-1 wn.

Key words: modulation, spread spectrum system, direction finding, wireless location, mobile communication

中图分类号: