Study of the Influence of Delay Errors to Combining Performance in Antenna Arraying

摘要

The estimation accuracy of antenna delay is one of the most important parameters for arraying combining performance in deep space network. The estimation of combining loss is presented, according to the probability distribution of delay errors. The impact of delay error to signal waveform and decode is analyzed. Theoretical analysis and simulation results show that the standard deviation of delay should be less than 0.09 times code width for uniform array, to ensure the combining loss caused by the delay error less than 0. ldB. The impact of delay errors to combined signal waveform can be equivalent to Gaussian filtering, if there are enough antennas. Delay errors can also cause intersymbol interference.