| BICM在差分跳频系统中的应用 |
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| 引用本文： | 朱毅超,甘良才,熊俊俏,郭见兵. BICM在差分跳频系统中的应用[J]. 电波科学学报, 2009, 24(1) |
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| 作者姓名： | 朱毅超 甘良才 熊俊俏 郭见兵 |
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| 作者单位： | 武汉大学电子信息学院,湖北,武汉,430079 |
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| 摘 要： | 将比特交织编码调制(BICM)技术应用于差分跳频(DFH)通信系统,在加性白高斯噪声(AwGN)信道及频率非选择性瑞利慢衰落信道下,对采用无迭代译码及迭代译码的系统比特误码率(BER)上界进行了理论推导及数值仿真验证,并与传统的差分跳频系统的性能进行了比较.其数值仿真结果表明:采用BICM技术的差分跳频系统,可以在不增加跳频带宽及译码复杂度的情况下,利用最优卷积码增大了其G函数网格图的最小自由距离.同时对于可用频率数为16的无迭代译码BICM/DFH,当BER为10-1时,在瑞利信道下相对于CHESS系统而言,其性能改善可达6dB.若采用迭代译码,则当BER为10-1时,其性能相对于无迭代译码可进一步改善3,dB.
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| 关 键 词： | 差分跳频(DFH) 比特交织编码调制(BICM) 迭代译码 |
Performance of BICM in the differential frequency hopping system |
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| ZHU Yi-chao,GAN Liang-cai,XIONG Jun-qiao,GUO Jian-bing. Performance of BICM in the differential frequency hopping system[J]. Chinese Journal of Radio Science, 2009, 24(1) |
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| Authors: | ZHU Yi-chao GAN Liang-cai XIONG Jun-qiao GUO Jian-bing |
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| Affiliation: | School of Electronic Information;Wuhan University;Wuhan Hubei 430079;China |
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| Abstract: | The bit-interleaved coded modulation(BICM) technique is applied to the differential frequency hopping(DFH) system.Bit error rate(BER) upperbounds corresponding to noniterative decoding and iterative decoding are derived,over both the additive white Gaussian noise(AWGN) channel and the frequency nonselective Rayleigh fading channel.All the numerical results are verified via simulations.A comparisons has been made between the BICM/DFH system and the conventional DFH system,shouing that the application of BICM... |
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