| 摘要: |
| 为了突破正弦载波通信体制的约束，有效提高系统的频带利用率，提出了基于频-时域的非正弦波通信系统设计方法。采用从频域出发再到时域波形设计的通信系统设计思想，通过构建频域特性函数，反向设计时域脉冲波形；经时域正交脉冲组构建、非正弦时域正交调制，实现了信息的无载波传输。理论分析及仿真结果表明：该方法可使已调信号具有较好的能量聚集性，无需滤波而直接送往信道传输，可有效减少对其它频段用户产生电磁干扰，且系统的频带利用率可快速接近2 bit/s·Hz-1。 |
| 关键词: 载波通信 频带利用率 非正弦 正交调制 |
| DOI：10.3969/j.issn.1001-893X. |
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| 基金项目: |
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| Design Method of Nonsinusoidal Wave Communication System Based on Frequency Time Domain |
| ZHAO Zhi-yong,WANG Hong-xing,ZHONG Pei-lin,SHU Gen-chun,LIU Xi-guo,LIU Chuan-hui |
| (Department of Electronic and Information Engineering,Naval Aeronautical and Astronautical University, Yantai 264001，China) |
| Abstract: |
| For the limits in sinusoidal wave communication, and to improve system bandwidth efficiency at the same time,the design of nonsinusoidal wave communication system is proposed based on frequencytime domain. The idea of communication system design is adopted in which pulse waves are designed by constructing frequency function. Information is transmitted without carriers by designing orthogonal pulses and the orthogonal modulation in time domain. Theoretical analysis and simulation results show that the modulated signal has efficient energy concentration which is important for the system power efficiency and can be sent to the channel directly without interfering other users. The bandwidth efficiency can be fast close to 2bit/s·Hz-1. |
| Key words: carrier communication bandwidth efficiency nonsinusoidal orthogonal modulatio |
