大气激光通信非对称限幅光正交频分复用技术

将一种新的正交频分复用调制技术运用到大气激光通信系统中,分析了采用这种非对称限幅光正交频分复用调制技术的大气激光通信系统在大气湍流信道下的性能.在此基础上,把非对称限幅光正交频分复用调制方案与传统的开关键控及直流偏置光正交频分复用调制方案进行了比较,并在大气湍流信道中进行了仿真.仿真结果表明:非对称限幅光正交频分复用调...

Performance analysis of atmospheric laser communication system basing on asymmetrically clipped optical OFDM intensity modulation

The asymmetrically clipped optical orthogonal frequency division multiplexing(OFDM) is a optical power efficient modulation technique. It is a new technique for using OFDM in optical system. Asymmetrically clipped OFDM is derived from a bipolar OFDM waveform by setting the negative values to zero. The asymmetrically clipped OFDM technique is applied to atmospheric communication system in this paper, and we analyze the performance of atmospheric communication system using asymmetrically clipped OFDM technique through atmospheric turbulence channels. On this basis, asymmetrically clipped optical OFDM modulation is compared against on/off keying (OOK) modulation and DC optical OFDM modulation in the atmospheric turbulence channel ,and it is simulated in the atmospheric turbulence channel. The simulation results show that the above scheme can satisfy the need of atmospheric laser communication system.