| 有色噪声下FSK相干解调器性能的改善 |
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| 引用本文： | 沈越泓,李兴国,益晓新. 有色噪声下FSK相干解调器性能的改善[J]. 南京理工大学学报(自然科学版), 2000, 24(1): 42-45 |
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| 作者姓名： | 沈越泓 李兴国 益晓新 |
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| 作者单位： | 1. 南京理工大学电子工程与光电技术学院,南京,210094
2. 通信工程学院无线电通信工程系,南京,210016 |
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| 摘 要： | 鉴于ＦＳＫ在目前仍具有较高的实用价值，且存在着改进的余地，该文根据误码率的定义及其几何意义，给出了一种对传统ＦＳＫ相干解调器有色高斯噪声信道条件下的改进方法，导出了新解调器结构，并进行了理论分析与计算机仿真试验，其所获得的结果均证明该解调器在加性高斯白噪声信道条件下与传统ＦＳＫ相干解调器的误码性能相同；在ＡＣＧＮ信道条件下其误码性能优于传统ＦＳＫ相干解调器。
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| 关 键 词： | 数字调制 数字解调 FSK 相干解调器 色噪声 |
| 修稿时间： | 1999-01-18 |
Improvement of the Performance of a Coherent FSK System |
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| Abstract: | In view of the fact that frequency shift keying (FSK) possesses great practical value and embodies some improvements,in the paper,a method to improve the traditionary FSK coherent modem in a colored Gaussian noise (ACGN) channel conditions is given by the use of bit error rate. The structure of a novel optimal coherent modem is derived.The theoretical analysis and computer simulation test are made.Those two obtained results show that the bit error property of the novel modem in additive colored Gaussian noise environment is the same as traditionary FSK coherent modem;In ACGN channel environment its bit error property of the modem is better than that of traditionary FSK coherent modem. |
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| Keywords: | digital modulation digital demodulation optimal reception digital communication |
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