| DSSS滑动相关捕获算法改进及性能分析 |
| |
| 引用本文： | 杨灵,赵笙罡,胡修林.DSSS滑动相关捕获算法改进及性能分析[J].电讯技术,2007,47(1):78-81. |
| |
| 作者姓名： | 杨灵 赵笙罡 胡修林 |
| |
| 作者单位： | 华中科技大学,电子与信息工程系,武汉,430074 |
| |
| 摘 要： | 提出一种减小直接序列扩频(DSSS)接收机信号捕获时间的改进方法.在传统滑动相关捕获算法基础上,增加一条参考支路,使相关曲线出现正负双峰值.利用双峰设置正负门限,形成二次判决,在不增加系统复杂度的基础上,减小了虚警概率,减少了平均捕获时间.计算机仿真证明了该方法的有效性.实验数据表明该方法在低信噪比下效果更加明显.
|
| 关 键 词： | 直接序列扩频 接收机 滑动相关捕获 正负门限 虚警概率 |
| 文章编号： | 1001-893X（2007）01-0078-04 |
| 收稿时间： | 2006/5/22 0:00:00 |
| 修稿时间： | 2006-05-222006-09-25 |
Improvement and Performance Analysis of Slippage Correlation Acquisition for DSSS Signals |
| |
| YANG Ling,ZHAO Sheng-gang,HU Xiu-lin.Improvement and Performance Analysis of Slippage Correlation Acquisition for DSSS Signals[J].Telecommunication Engineering,2007,47(1):78-81. |
| |
| Authors: | YANG Ling ZHAO Sheng-gang HU Xiu-lin |
| |
| Affiliation: | Department of Electronics and Information Engineering, Huazhong University of Science and Technology, Wuhan 430074, China |
| |
| Abstract: | A better method for direct sequence spread spectrum(DSSS) receiver to decrease the acquisition time is proposed.Based on the traditional slippage correlation acquisition,adding an external circuit for reference makes the positive-negative maximum of the merit of correlation.Dual-judgement uses the positive-negative threshold based on the two maximum values.So the probability of alarm and acquisition time are decreased without increasing complexity of the system.The availability is proved by simulation.The data from experiment show that the method is more efficient in low SNR. |
| |
| Keywords: | DSSS receiver slippage correlation acquisition positive - negative threshold probability of alarm |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《电讯技术》浏览原始摘要信息 |
|
点击此处可从《电讯技术》下载全文 |
