CARRIER RECOVERY SYSTEM FOR A VESTIGIAL SIDEBAND S

专利名称：CARRIER RECOVERY SYSTEM FOR A

VESTIGIAL SIDEBAND SIGNAL

发明人：STROLLE, Christopher, Hugh,JAFFE, Steven,

Todd

申请号：EP95914709.1申请日：19950313公开号：EP0752185B1公开日：20020717

摘要：A television signal receiver for processing an HDTV signal transmitted in avestigial sideband (VSB) format includes input complex filters shared by a timing recoverynetwork (30) and a carrier recovery network (50). The filter network includes a pair ofupper and lower band edge filters (20, 22) mirror imaged around the upper and lowerband edges of the VSB signal for producing suppressed subcarrier AM output signals.The timing recovery network includes a phase detector (28, 38, 62) and responds to anAM signal derived from the two filters (via 26) for synchronizing a system clock (CLK). Thecarrier recovery network (50) also includes a phase detector (, 60, 62, ), and

responds to outputs from one or both of the filters for producing an output error signal(Δ) representing a phase/frequency offset of the VSB signal. The error signal is used toreduce or eliminate the offset to produce a recovered baseband or near baseband signal.A subsequent equalizer eliminates any residual phase offsets in the recovered signal.

申请人：RCA THOMSON LICENSING CORP

地址：US

国籍：US

代理机构：Ruellan-Lemonnier, Brigitte

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