An efficient all digital VSB modulator for HDTV terrestrial broadcasting

This paper presents an efficient all digital implementation method of VSB modulator used for HDTV terrestrial transmission. It uses only four simple similar spectrum shaping filters to complete the VSB signal generation and the pilot insertion is novelly optimized to several addition operations, which greatly reduces the hardware complexity. Most of the circuitry runs at a speed of only half of the input symbol rate, which results in relatively low power consumption. Furthermore, the presented architecture is able to complete the QAM modulation via only bypassing a few logic components. Prototypes implemented by this method are now under field trial, and it has already shown good spectrum quality. This method is quite suited for VLSI implementation.