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A modified decision feedback equalizer (DFE) is proposed for efficient equalization of sparse channels with large delay echoes. This new structure can both avoid noise accumulation in large number of filter taps and reduce hardware implementation complexity effectively. Brief analysis about noise accumulation effects in large-scale equalizer and working mechanism description of this effective NRCR-DFE algorithm exhibit us where the performance gain lies. Simulation results show that this modified DFE has higher performance than the conventional ones and is quite fit for applications in high-speed systems like high definition television (HDTV) and broadband mobile communication.