Research of the influence of a symbol synchronization error on the common phase error of the DRM signal, recovered by using pilots in an AWGN channel
This paper presents investigation results of the influence of the estimation error of the beginning of the OFDM symbol on group phase error in case of DRM-signal, reconstructed from the pilots in AWGN channel. The measurements were made by using the model of DRM-transmitter and DRM-receiver. The model was created by means of the applied mathematical software MATLAB/SIMULINK in accordance with the digital broadcasting standard ETSI ES 201 980 V3.1.1 (2009-08). Also there are a brief description of the model and the presentation of its main technical features. During the experiments, we have obtained the relation between the average phase error of carriers and the delay, that is, errors in determining the start of the OFDM symbol for constellations QAM 4, QAM 16 and QAM 64 in the channel with AWGN. In addition, the dependence of the average phase error of carriers on the noise of AWGN channel has been investigated for modulations QAM 4, QAM 16 and QAM 64 and for delays equal to 0 and 5 samples.