无线光通信差错控制系统的时间参数特性

Characterization of Time Parameter of Error Control Scheme in Optical Wireless Communication

在无线光通信系统中 ,光强闪烁和大气衰减等因素将使通信系统产生长突发误码 ,结合Turbo码 ,建议并分析了两种差错控制方案中时间参数的特性。对于Turbo码 +信道交织的差错控制方案 ,仿真分析了不同信道交织深度下的无线光通信系统性能 ,给出了特性曲线。对于Turbo码 +反馈重发 (ARQ)的方案 ,仿真结果表明反馈环路延迟时间的变化不影响系统的平均吞吐量 。

The paper proposes and analyzes two turbo coded error control schemes to improve performance of optical wireless communication with long burst error by scintillation and attenuation. Characterization of time parameter of two error control schemes was provided to design. For turbo code + channel interleaving scheme, the paper shows performance of optical wireless communication under various channel interleaving depth. For turbo code + ARQ scheme, simulations show that the feedback delay don′t influence average link throughput, but the feedback delay changes average link delay and probability distribution of transmitting times.