Evaluation of single carrier and multi-carrier modulation techniques for digital ATV terrestrial broadcasting
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چکیده
This report presents results of computer simulations and laboratory tests conducted at the CRC to investigate various channel coding techniques proposed for the terrestrial broadcasting of digital advanced television (ATV). The system performance of these techniques is evaluated for various impairments, such as Gaussian noise and co-channel NTSC and ATV interference. The performance of NTSC with interference from co-channel ATV is also evaluated. The channel coding techniques investigated include conventional single carrier per channel (SCPC) modulation using trellis-coded QAM constellations, and multi-carrier modulation (MCM), such as orthogonal frequency division multiplexing (OFDM) also with a trellis-coded QAM constellation. A measure of the bit error rate (BER) performance is given for comparing the various configurations. Results indicate that both single carrier and MCM offer similar performance in noise and NTSC interference, but OFDM can have a considerable advantage in multipath. Évaluation des techniques de modulation simple porteuse et multiporteuses appliquées à la radiodiffusion numérique de signaux télévision à l'aide d'émetteurs terrestres
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تاریخ انتشار 1994