Novel robust transmitter identification technique for digital television signals

The transmitter identification (Tx-ID) technique has been addressed in the modern ATSC digital television standards. Kasami sequences are adopted as the Tx-ID sequences due to the favorable code capacity. However, the conventional cross-correlation based Tx-ID technique cannot combat the realistic multipath channel impairment. Therefore, in this paper, we propose a new least-square Tx-ID approach, which is demonstrated to be very robust when the multipath channels are encountered. Besides, we also establish the new Hessian analysis to derive the constraint of the injection level. Finally, we devise a fast Tx-ID scheme when the channel length is set to be equal to the Tx-ID sequence length.