基于快速信道捕获与系数映射均衡的流星通信接收机

A Receiver for Meteor Burst Communication Based on Equalizer Coefficients Direct Adaptation via Channel Acquisition

针对流星余迹通信原理及信道特点,构造了基于自适应编码调制的变速率通信机制,提出了有效利用传输帧结构的快速信道估计及系数映射均衡的流星余迹通信接收机.在利用时域相关运算快速捕获流星信道冲击响应的基础上,推导出信道参数与均衡器系数之间的映射关系,直接计算出判决反馈均衡器的抽头系数,从而实现流星余迹通信自适应编码调制方式数据的可靠接收.该接收机在信道变化的情况下具有较快的收敛速度,和较好的抗噪声性能.仿真结果和复杂度分析验证了算法的有效性.

According to the analysis of meteor burst charmel, the mechanism of variable rate data transmission for Meteor Burst Communication （MBC） is developed and a receiver based on coefficients-mapped decision feedback equalization （DIRE） via channel acquisition is proposed, which agrees with the structure of MBC data frame. With the channel impulse response being obtained by fast correlation operation, the relationship between charmel parameters and equalizer coefficients is derived so that DFE coefficients can be directly calculated from the estimated channel parameters. It is shown that, the presented algorithm provide more significantly robust against channel variation than a traditional DIrE employing adaptive coefficient tracking, and therefore makes data receiving stable for variable rate data transmission of MBC system. Computer simulation results are also included to support our development.