| 64DAPSK信号性能分析及其在短波通信中的应用 |
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| 引用本文： | 杨杰,杨莘元,蔚娜.64DAPSK信号性能分析及其在短波通信中的应用[J].武汉理工大学学报(信息与管理工程版),2007,29(7):10-12. |
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| 作者姓名： | 杨杰 杨莘元 蔚娜 |
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| 作者单位： | 哈尔滨工程大学,信息与通信工程学院,黑龙江,哈尔滨,150001 |
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| 摘 要： | 在电离层中传播的短波信号会受到多径传播、多普勒频移和扩展以及衰落的影响,这样会使信息传输的错误比特率增加。OFDM是一种能有效降低多径传播对信号影响的调制技术,而采用DAPSK调制技术可以降低接收设备的复杂度。主要分析了在不同组合方式下（16DPSK/4DASK,16DPSK/4ASK,16PSK/4DASK）64DAPSK-OFDM系统的性能,仿真结果表明,16PSK/4DASK-OFDM在AWGN信道和HF信道下都优于其他2种组合方案的64DAPSK-OFDM系统。
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| 关 键 词： | 差分编码振幅相位联合键控 正交频分复用 短波通信 |
| 文章编号： | 1007-144X（2007）07-0010-03 |
| 修稿时间： | 2007-04-26 |
Performance Analysis of 64DAPSK Signal and Its Application in HF Communications |
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| YANG Jie,YANG Xin Yuan,WEI Na.Performance Analysis of 64DAPSK Signal and Its Application in HF Communications[J].Journal of Wuhan University of Technology(Information & Management Engineering),2007,29(7):10-12. |
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| Authors: | YANG Jie YANG Xin Yuan WEI Na |
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| Affiliation: | College of Information and Communication Engineering, Harbin Engineering University, Harbin 150001, China |
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| Abstract: | HF transmission signals are distorted by multi -path propagation, Doppler spread and signal level fading in the ionospheric channel. In the case of digital transmission systems, the distortion of signals will cause a degradation of bit error performante. The OFDM modulation scheme can mitigate the adverse effects of muhi - path fading. And the DAPSK modulation scheme can reduce the complexity in implementation. Performance of 64DAPSK is analyzed, with three combination methods considered, such as 16DPSK/4DASK, 16DPSK/4ASK, and 16PSK/4DASK. Simulation adopted 64DAPSK -OFDM is done in AWGN channel and HF channel. And the result shows that performance of 16PSK/4DASK - OFDM is better than that of others. |
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| Keywords: | DAPSK OFDM high frequency(HF) communications |
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