Turbo Equalization Performance Analysis and Application in the HF Communication System

Data transmission is affected by factors such as multipath effect, noise, time varying and Doppler effect in HF channel. In comparison with traditional equalization, turbo equalization is a better approach to these problems. In this paper, we build a simulation model of turbo equalization in HF communication system based on the characteristics of HF channel, comparatively analyze of the effect of some parameters such as length of interleaver, number of iterations and convolutional encoder. Subsequently the burst waveform in MIL-STD-188-141b and the MMSE-based turbo equalizer was developed, thus providing a reliable basis for the application of Turbo equalization in HF channel. The simulation illustrates that the MMSE-based Turbo equalization can reduce the gap between the simulation BER curve and theoretical curve, alleviating the impact of multipath fading, noise and Doppler effect; providing a high value and extensive application prospect.