发明名称 |
Coherent signal detector for AM-compatible digital audio broadcast waveform recovery |
摘要 |
A coherent signal detector for extracting analog and digital information from a received AM-compatible digital broadcast waveform is provided. The waveform can have an in-phase component and a quadrature component. The detector can include a down converter for shifting the in-phase and quadrature components in phase, frequency, or both, in response to a phase word, thereby providing a recovered in-phase output and a recovered quadrature output. The signal detector also includes an integration circuit for integrating a portion of the recovered quadrature output over a first preselected time interval, which can be one digital time frame.
|
申请公布号 |
US5878089(A) |
申请公布日期 |
1999.03.02 |
申请号 |
US19970803699 |
申请日期 |
1997.02.21 |
申请人 |
USA DIGITAL RADIO PARTNERS, L.P. |
发明人 |
DAPPER, MARK J.;CARLIN, BARRY W.;GEILE, MICHAEL J. |
分类号 |
H03D3/00;H03D3/24;H03G3/30;(IPC1-7):H03D3/22 |
主分类号 |
H03D3/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|