Joint Interference Rejection And Carrier Frequency Offset Compensation In Wireless Receivers Employing Block Ica

In future Software Defined Radio (SDR) communication systems, most radio functionalities are performed in the digital domain. For wireless transceivers, digital implementations offer flexibility and potential for greater degree of integration. In this paper, two important receiver functionalities are considered, namely, interference rejection and Carrier Frequency Offset (CFO) compensation. Block Independent Component Analysis (ICA) algorithms are employed as leading techniques to perform both tasks simultaneously at baseband. Diversity receiver structure is adopted that facilitates the use of ICA technique. Simulations are performed for BPSK receivers assuming typical CFO and fading conditions. The results indicate that the proposed method efficiently achieves desirable performance with reasonable computational complexity. Also, it is concluded that the recently proposed Optimum Block Adaptive ICA (OBA/ ICA) algorithm outperforms the well-known Fast-ICA algorithm due to the time-variation in the signal model introduced by CFO.