Study of skywave interference cancellation technique based on multi-user detection

In wireless navigation system worked on medium-short wave, skywave interference is a serious problem which influences the work region and orientation precision. Based on the model analysis of skywave interference, the method of using multi-user detection technique to eliminate sky wave interference is proposed. Estimate and rebuild the strong skywave interference, remove it from received signals, at last acquire and track earth wave and position. The realization structure adopted multi-user detection technique is analyzed, the realization of mainly models are given. The results of theoretical analysis and experiment show that the method can eliminate or decrease the influence of the skywave interference, improve the acquisition performance of groundwave effectively.