The invention advances a method device for broadening multiple carrier communication coherence bandwidth by cyclic shift of sampled value of time-domain signal in accordance with OFDM system. In OFDM system, it makes cyclic shift on received time-domain data sequence without cyclic prefix. And it comprises: deleting data segment A from OFDM symbol without cyclic prefix and simultaneously adding the data segment to the tail of the OFDM symbol; therefore, signal distortion caused by channel can be corrected by frequency-domain single tapping equilibrium. And it is simple to implement, able to act as an independent module applied to any frequency-domain pilot-based OFDM and MIMO-OFDM system channel estimation so as to improve system performance. |