Simulation of phase nonlinearity effects in a satellite channel

S. Tan
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Abstract

This simple channel simulation program is written using MATLAB to determine the influence of phase nonlinearity distortions on the bit error rate performance of BPSK signals transmitted through a satellite transponder and its ground station receiver. For simplicity, the channel is modelled as a cascade of two filters found in the IF section of the satellite transponder and ground station receiver. Coherent (synchronous) detection of the BPSK signal in the ground station receiver is assumed and the binary data is recovered using a sampling and threshold decision device. This simulation method has been applied to the UoSAT-12's Merlion bent-pipe transponder designed for 1 Mb/s BPSK data transmissions.
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卫星信道中相位非线性效应的仿真
利用MATLAB编写了简单的信道仿真程序,以确定相位非线性失真对卫星转发器及其地面站接收机传输的BPSK信号误码率性能的影响。为简单起见,该信道被建模为卫星转发器和地面站接收机中频部分的两个滤波器的级联。假设地面站接收机对BPSK信号进行相干(同步)检测,并利用采样和阈值判定装置恢复二进制数据。该仿真方法已应用于UoSAT-12卫星上1m /s BPSK数据传输的鱼尾狮弯管应答器。
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