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In multi-channel high-resolution and wide-swath SAR signal processing, Doppler centroid (DC) is essential for channel phase bias estimation and SAR focusing. By exploiting that an inaccurate Doppler centroid would introduce linear errors in phase bias estimation and consequently deteriorate the reconstructed Doppler spectrum, the Doppler centroid can be accurately estimated by Doppler spectrum optimisation...
LTE in Unlicensed band (LTE-U) has gained intensive attention recently due to its capability to offload mobile data to unlicensed bands. In order to use unlicensed band, LTE-U has to coexist with WiFi - another wireless technology that operates in unlicensed bands. This coexistence is riddled with several challenges as these technologies use different core networks, backhauls and deployment plans...
When combined with digital beam-forming (DBF) techniques, multichannel synthetic aperture radar (SAR) systems can achieve high-resolution and wide-swath SAR imaging. However, inevitable channel biases will degrade the performance of DBF in practice. To address this problem, a novel channel phase bias estimation algorithm is proposed in this letter. Theoretical analysis reveals that the signal of the...
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