中文说明：这被有关认知无线电和 ofdm 技术改善我已考虑的信噪比和 pu 和苏同时以便可以很好地评估其性能的 performance.here。
English Description：
this is related to the cognitive radio along with ofdm techniques to improve the performance.here i have considered the snr and pu and su simultaneously so that their performance can be evaluated nicely.