IEEE802.11p协议下一种改进的车载信道估计算法

An Improved Vehicular Channel Estimation Algorithm Based on IEEE802.11p Standard

可靠的信道估计是实现安全车载通信的核心。为实现安全的车载通信基于IEEE802.11p协议提出了一种改进的车载信道估计算法。所提算法基于WSUM算法,对其频域插值更新过程进行了改进,并融入了一种基于离散傅里叶变换(DFT)的去噪技术,来消除原算法在估计过程中的检测错误,减少误差传播对系统的影响。仿真结果表明,与现有的算法比较,所提的车载信道估计算法具有更好的误码率性能。

Reliable channel estimation is the core of safety vehicular communication.An improved vehicular channel estimation algorithm based on the IEEE802.11p standard is proposed for secure vehicular communication in this paper.The proposed algorithm improves the frequency domain interpolation update process based on the WSUM algorithm and incorporates a discrete Fourier transform(DFT)-based denoising technique to eliminate detection errors during the estimation process of the original algorithm and reduce the effects of error propagation on the system.Simulation results show that compared with the existing algorithms,the proposed vehicular channel estimation algorithm has better bit error rate performance.