Quantization Error Uwbr Digital Receiver System And I / Q Channel Imbalance

Since the conception of Ultra-wideband (UWB) radar was given first in the conference of Ultra-wideband radar in Los Alamos in 1990, People have done a lot of research about it. The main difference between UWB radar and traditional radar is that UWB radar fraction bandwidth is wider. So UWB radar make it possible that some detection that was thinked difficult before. Because the digital circuit is better on the stability, anti-jamming and procesing the signal, the digital receiver has standed for the developmental direction of the mordern advanced receiver.The paper analyzes the influence of the quantification error existing in the digital receiver on the output of pulse compressed signal. And then it introduces a novel technique for digitally obtaining the in-phase ( I ) and quadrature (0) components of an IF signal.lt is DPD technique.Finally, the influence of quantification error on the output of pulse compression signal is simulated by using the LFM signal and the NLFM signal. At the same time the effect of the imbalance of l~ 0 channel is simulated too. These conclution have given some reference for the system projection.