OFDMA, Orthogonal Frequency Division Multiple Access is a broad band communication method. Here channel estimation is more crucial. Based on the FFT size used for OFDM transmission method that many number of channel co-efficients are to be estimated

Abstract—In this paper we present an initial performance evaluation of the 3GPP UTRA Long Term Evolution (UTRA LTE) uplink with baseline settings. The performance results are obtained from a detailed UTRA LTE uplink link level simulator suppo

To fully exploit wireless radio resource and, thus, increase spectrum efficiency, cognitive radios shall sense wire- less environments and identify interference to allow opportunis- tic transmissions for secondary systems. Based on Chen et al.