VSB demodulator

Details VSB demodulator VSB demodulator

1997-05-30

2000-05-23

Tse, Young T.

Pulse or digital communications

Receivers

Amplitude modulation

375324, 375332, 375344, 329304, 329357, H04L 2706, H04L 2722

Patent

active

06067329&

ABSTRACT:
A Vestigal Sideband (VSB) demodulator having a clock generator for generating a clock signal based on a symbol frequency of the VSB signal; an A/D converter for converting the VSB signal into a digital signal based on the clock signal of the clock generator; a first multiplier for multiplying the digital signal by a first value sequence and generating a first multiplier output signal; a second multiplier for multiplying the digital signal by a second value sequence and generating a second multiplier output signal; a complex type filter for shaping and VSB demodulation of the multiplier output signals and generating Inphase and Quadrature data output signals; a decimating circuit for decimating the Inphase and Quadrature data output signals and generating decimated signals; a complex multiplier for multiplying the decimated signals by a predetermined value and generating multiplied output signals; an error detector for detecting a frequency deviation and a phase deviation from the multiplied output signals and generating the predetermined value for the complex multiplier; and DC offset canceler for removing a DC component from a portion of the multiplied output signals of the complex multiplier.

REFERENCES:
patent: 5588025 (1996-12-01), Strolle et al.
patent: 5673293 (1997-09-01), Scarpa et al.
patent: 5724396 (1998-03-01), Claydon et al.
patent: 5809088 (1998-09-01), Han

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