Abstract-One of the main task to be done by a cognitive receiver is to sensing its spectral environment in order to distinguish surrounding systems from each others. Actually most systems (such as WiMAX, WiFi, DVBT) are based on OFDM modulations but differ from their intercarrier spacing used in OFDM modulation. Therefore carrying out accurate intercarrier spacing estimator is a crucial step in cognitive radio. In this paper, we propose a new efficient algorithm to estimate the intercarrier spacing based on maximum-likelihood principle. Its performance is analysed through numerical simulations and compared to standard existing approaches.
For identification of wireless technology standards, Bouzegzi et al. propose an algorithm that can discriminate among different technologies such as WiMax, WiFi, and DVBT by exploiting the fact that these technologies are based on OFDM but differ from their intercarrier spacing used in OFDM REF .
Maximum likelihood based methods for OFDM intercarrier spacing characterization
2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications
2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications
Computer Science