Research on evaluation of BER in communication system

According to the method of BER measurement which is measured in close loop and very time consuming when the bit rate is low, the method of BER evaluation using EVM is proposed, which is using empirical equation based on equipment under test and different from traditional theoretic prediction. Experiment was carried out based on a baseband system, the difference between the predicted and the measured is smaller than 13.6%. The results show that using empirical equation to estimate the performance of object system is useful in Additive White Gaussian Noise environment. What's more, EVM reflects the effects in process directly and can be traced to the national standard.