Error rotated decision feedback equalizer for Chinese DTTB Receiver

In this paper, an error rotated decision feedback equalizer (DFE) based on the minimum-mean-square error (MMSE) criterion is proposed for Chinese DTTB Receiver. When the DFE is complex, the length of it is large and the convergence algorithm is least mean square (LMS), the residual carrier frequency error and the phase noise from tuner will seriously weaken the performance of DFE. As an adaptive filter, the DFE will respond to the variation of phase error. Furthermore, it is difficult to estimate the phase error when the other factors of channel distortion exist. The proposed DFE has properly solved these problems. Analysis and simulation show that not only phase noise can be estimated and nicely compensated but also DFE will not be interfered by the phase error. So the performance of DFE is improved.