在OFDM系统中，针对多普勒频偏采用多种算法进行校正，该文总结了这些算法。-In OFDM system, for the use of a wide range of Doppler shift correction algorithm, the text summary of the algorithm.

This code performs wide band Cooperative Spectrum Sensing under various noise levels. A large number of primary users as well as secondary users are considered.The detection is power spectral density based . This project gives the lower bound for the