Reduced complexity feedforward frequency offset estimator for AWGN communication channels

A reduced complexity generalised form frequency offset estimator is presented. The new estimator is considered as the general form of the simple autocorrelation estimator of the already published Luise and Regiannini frequency offset estimator. However, it uses different autocorrelation delays to lower the (1995) complexity maintaining close to optimum performance. Theoretical and practical analyses of the new estimator are investigated. A comparison of performance and implementation cost is given. The new estimator is shown to have an order of magnitude lower computational complexity while attaining comparable performance.