| 基于统计平均的正交解调误差校正新方法 |
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| 引用本文： | 袁俊泉,周亚强,皇甫堪.基于统计平均的正交解调误差校正新方法[J].系统工程与电子技术,2005,27(7):1219-1221. |
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| 作者姓名： | 袁俊泉 周亚强 皇甫堪 |
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| 作者单位： | 国防科技大学电子科学与工程学院信号处理研究室,湖南,长沙,410073 |
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| 摘 要： | 采用正交解调接收机来获得I、Q信号时,接收机两个通道间不可避免地会存在一定的解调误差。利用在接收机输入端加入测试信号,基于统计平均的思想求出所需要的校正系数,然后实现正交解调误差的校正。通过仿真验证了校正方法的有效性,校正系数的估计方差与克拉-美罗界渐进一致。在输入信噪比为10dB时,正交解调校正后,镜频分量比校正前降低了-35.7dB。
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| 关 键 词： | 正交解调接收机 误差校正 统计平均 |
| 文章编号： | 1001-506X(2005)07-1219-03 |
| 修稿时间： | 2004年5月16日 |
New method for correction of quadrature demodulation errors based on statistic average |
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| YUAN Jun-quan,Zhou Ya-qiang,HUANGFU Kan.New method for correction of quadrature demodulation errors based on statistic average[J].System Engineering and Electronics,2005,27(7):1219-1221. |
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| Authors: | YUAN Jun-quan Zhou Ya-qiang HUANGFU Kan |
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| Abstract: | Quadrature demodulation receiver has necessarily errors when producing in-phase(I) and quadrature (Q) components. Correction coefficients can be received based on statistic average when importing a test signal. Then quadrature demodulation errors are realized. Simulation results prove the validity of the new method. Estimated vari- ances of correction coefficients and their CRLB are asymptotically consistent. When input SNR is 10 dB, image re- sponse signal power improves 35.7 dB before and after correction. |
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| Keywords: | quadrature demodulation receiver error correction statistic average |
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