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—The ability of orthogonal frequency-division mul-tiplexing systems to mitigate frequency-selective channels is impaired by the presence of carrier frequency offsets (CFOs). In this paper, we investigate identifiability issues involving high-resolution techniques that have been proposed for blind CFO estimation based on null subcarriers. We propose new(More)
— High data rates and multipath propagation give rise to frequency-selectivity of wireless channels, while carrier frequency-offsets and mobility-induced Doppler shifts introduce time-selectivity in wireless links. The resulting time-and frequency-selective (or doubly-selective) channels offer joint multipath-Doppler diversity gains. Relying on a basis(More)
In MIMO systems, Maximum Likelihood (ML) detectors become complex and hence infeasible when the constellation size and the number of tran smit-antennas are large. Whereas linear equalizers are relatively simpler and less complex but their performance is poor. The project deals with improvement of performance of linear equalizers using lattice-reduction(More)
Clock synchronization across a network is essential for a large number of applications ranging from wired network measurements to data fusion in sensor networks. Earlier techniques are either limited to undesirable accuracy or rely on specific hardware characteristics that may not be available for certain systems. In this work, we examine the clock(More)