| 采用复合调制的AM广播功率谱分析 |
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| 引用本文： | 戚晨皓,吴乐南.采用复合调制的AM广播功率谱分析[J].应用科学学报,2007,25(6):583-588. |
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| 作者姓名： | 戚晨皓 吴乐南 |
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| 作者单位： | 东南大学 信息科学与工程学院, 江苏 南京 210096 |
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| 摘 要： | 分析采用EBPSK/DSB-AM复合调制的AM广播发射信号功率谱，给出复合传输系统的结构和发射信号的波形表达式。以美国FCC规定的功率谱发射掩模和我国关于AM发射机基本参数的国家标准为具体指标，对比了通过几种不同的发射滤波器后复合调制信号的功率谱结构，以及相应的数据传输性能。系统仿真表明，在满足给定发射信号功率谱衰减和一定的信噪比条件下，模拟AM广播和EBPSK数据传输都能获得良好的性能。
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| 关 键 词： | 功率谱 AM广播 扩展的二元相移键控 FCC功率谱掩模 |
| 文章编号： | 0255-8297（2007）06-0583-06 |
| 收稿时间： | 2007-06-27 |
| 修稿时间： | 2007-06-27 |
Power Spectrum Density Analysis on AM Broadcasting Using Hybrid Modulation |
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| QI Chen-hao,WU Le-nan.Power Spectrum Density Analysis on AM Broadcasting Using Hybrid Modulation[J].Journal of Applied Sciences,2007,25(6):583-588. |
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| Authors: | QI Chen-hao WU Le-nan |
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| Institution: | School of Information Science and Engineering, Southeast University, Nanjing 210096, China |
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| Abstract: | Power spectrum density(PSD) analysis for hybrid modulated signal is presented in the paper.The system,which combines extended binary phase shift keying(EBPSK) with double sideband amplitude modulation(DSB-AM),is introduced, and its waveform expression given.With regard to FCC's(federal communications commission) AM spectral emission mask and China's national standards on AM transmitter,comparisons are made on the effects of taking different band-pass filters into the hybrid system,and on the demodulation performances.Computer simulations demonstrate that good performance of both modulations can be obtained at certain SNR within the given PSD constraint. |
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| Keywords: | power spectrum density(PSD) AM EBPSK FCC spectral mask |
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