煤矿井下OFDM系统信道估计算法研究及FPGA实现

Study of Channel Estimation Algorithm of OFDM System in Coal Mine Tunnel Environment and Realization on FPGA

OFDM技术具有良好的抗多径衰落能力,非常适合煤矿井下无线通信。针对煤矿井下复杂、随机的无线信道特性,在MATLAB环境下建立OFDM系统仿真模型,通过对不同的信道估计算法进行仿真、比较,选择了基于DCT的信道估计算法,并将此算法在FPGA硬件平台上实现。仿真结果表明,该算法是一种在煤矿井下无线信道环境中效果较理想的信道估计实现方案,具有较好的实用价值。

OFDM technology has good anti-multipath decline ability,which is very suitable for coal mine tunnel wireless communication. According to the complex and random wireless channel characteristics, a system simulation model is established under the environment of MATLAB, based on the sim- ulation and comparison of different channel estimation algorithms, the channel estimation algorithm based on DCT is chosen, and is realized in FPGA hardware platform. The simulation results show that the algorithm is a channel estimation implementation scheme which performs well in the coal mine tunnel wireless channel environment, and the practical value is better.