面向车联网通信的非平稳信道仿真方法

Simulation method on non-stationary channel for Vehicle-to-Vehicle communications

针对车联网通信过程中收发端双移动带来的信道状态快速时变和非平稳问题,提出一种面向车-车通信的非平稳信道仿真方法。通过引入积分项保证输出信道衰落相位的连续性,考虑收发端参数的时变特性,实现多普勒频率参数的准确计算。数值仿真结果表明,该方法生成的信道统计特性如概率密度函数、自相关函数和多普勒功率谱密度的仿真值与理论值吻合。因此,该仿真方法可用于未来车载通信设备研发和批量生产阶段的验证评估和性能测试。

To solve the fast time-variant and non-stationary problems caused by movements of both the transmitter and receiver under the Vehicle-to-X scenarios,a non-stationary channel simulation method for Vehicle-to-Vehicle(V2V)communication was proposed.The fading phase continuity of output channel fading was guaranteed by introducing the integral term,and the accurate calculation of Doppler frequency was achieved by considering the time-variant features of transmitter and receiver.The simulation results show that the simulated channel statistical properties generated using the proposed method such as probability density function,autocorrelation function,and Doppler power spectral density are consistent with that of the theoretical ones.Therefore,the proposed simulation method can be used in the performance validation and evaluation in the development and mass-production of V2V communication equipment.