| DSSS/QPSK信号盲检测方法仿真 |
| |
| 引用本文： | 肖治宇,吕明,唐斌.DSSS/QPSK信号盲检测方法仿真[J].电子科技,2007(9):41-44. |
| |
| 作者姓名： | 肖治宇 吕明 唐斌 |
| |
| 作者单位： | 电子科技大学,电子工程学院,四川,成都,610054;电子科技大学,电子工程学院,四川,成都,610054;电子科技大学,电子工程学院,四川,成都,610054 |
| |
| 摘 要： | 采用功率谱检测法,自相关检测法和高阶累计量检测法对低信噪比下DSSS/QPSK信号进行检测方法。计算机仿真表明,功率谱检测法在信噪比较低时失去了检测能力,而充分利用了伪随机码周期特性的自相关检测法和高阶累计量检测法的检测性能较优,高阶累计量法由于其更好的抑制噪声特性显示出更好的性能。同时,文中比较了DSSS/BPSK信号和DSSS/QPSK信号在相同检测方法下的性能差异。由于调制方式不同,相同的方法对DSSS/QPSK信号的检测性能略低于DSSS/BPSK信号。
|
| 关 键 词： | 直接序列扩频信号 QPSK调制 盲检测 |
| 收稿时间： | 2007-02-05 |
| 修稿时间： | 2007-02-05 |
Simulation of Blind Detection of DSSS/QPSK Signal |
| |
| Xiao Zhiyu,Lü Ming,Tang Bin.Simulation of Blind Detection of DSSS/QPSK Signal[J].Electronic Science and Technology,2007(9):41-44. |
| |
| Authors: | Xiao Zhiyu Lü Ming Tang Bin |
| |
| Abstract: | In this paper,power spectrum detection method,correlation detection method and high-order statistics detection method are introduced to detect DSSS/QPSK signal at low SNR.Simulation shows that power spectrum detection method cannot detect the signal at low SNR,while the correlation detection method and high -order statistics detection method work well.Especially the high-order statistics detection method achieves better performance.The capability difference between DSSS/BPSK signal and DSSS/QPSK signal are also measured.Due to different modulate modes,the detect capability of DSSS/BPSK signal is better than DSSS/ QPSK signal with the same detection method. |
| |
| Keywords: | DS/SS QPSK modulation blind detection |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
