发明名称 |
VESTIGIAL SIDEBAND GENERATOR PARTICULARLY FOR DIGITAL TELEVISION |
摘要 |
A digital television transmitter for an ATSC or NTSC signal includes a digit al vestigial sideband modulator having a digital sinusoidal source. A digital multiplier arrangement multiplies a digital signal including the information in the digital television signal by a sequence derived by the digital sinusoidal source to derive plural orthogonally phased digital product signals. A digital lowpass filter arrangement passes low frequency component s of the plural digital product signals and rejects high frequency components of the plural digital product signals. A signal combiner arrangement combines a carrier with signals containing information passed by the lowpass filter arrangement necessary to derive a vestigial sideband signal. The combiner arrangement includes at least one digital to analog converter that in different embodiments derives a vestigial sideband signal that modulates an I.F. or R.F. carrier.
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申请公布号 |
CA2361010(A1) |
申请公布日期 |
2000.08.03 |
申请号 |
CA20002361010 |
申请日期 |
2000.01.27 |
申请人 |
ADC BROADBAND WIRELESS GROUP, INC. |
发明人 |
HERSHBERGER, DAVID L. |
分类号 |
H03C1/60;(IPC1-7):H03C1/60 |
主分类号 |
H03C1/60 |
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