Additional Data Transmission Scheme Using TxID Signal for ATSC System

Abstract

In a Single Frequency Network (SFN) for Advanced Television Systems Committee (ATSC) terrestrial digital television (DTV) system, the interferences induced by the multiple transmitters and/or repeaters using same frequency are unavoidable. To ease the interference handing in the SFN for ATSC DTV system, transmitter identification (TxID) signal is recommended in the ATSC terrestrial DTV system. The TxID signal is embedded in the ATSC DTV signal and transmitted from each transmitter and repeater within the SFN and in ATSC recommended practice (RP) A/111, Kasami sequence is recommended as the TxID signal. In this paper, we propose an additional data transmission scheme using the TxID signal. In the proposed scheme, the Kasami sequence not only acts as the conventional TxID of the SFN for ATSC terrestrial DTV system but also carriers the additional data bits on its polarity and the code phase.

Augmented Data Transmission Based on Low Density Parity Check Code for the ATSC Terrestrial DTV System

“…In [10], additional data bits are mapped to Walsh sequences, and then spread by the Kasami sequence. However, the maximally achievable data rate of the schemes in [9] and [10] is only a few kbps.…”

“…However, the achievable data rate of the scheme in [7] and [8] is at most approximately160 bits per second (bps). In order to increase the data rate, other methods were proposed in [9] and [10]. The former uses the polarity and phase of the TxID signal and the latter combines TxID signal and Walsh sequence.…”

“…The former uses the polarity and phase of the TxID signal and the latter combines TxID signal and Walsh sequence. In [9], the Kasami sequence not only acts as the conventional TxID signal but also carries the additional data bits of the data rate up to 1.157 kbps. In [10], additional data bits are mapped to Walsh sequences, and then spread by the Kasami sequence.…”