发明名称 |
SYSTEM FOR RECOVERING INFORMATION FROM A MAGNETIC FIELD SIGNAL USABLE FOR LOCATING AN UNDERGROUND OBJECT AND METHOD |
摘要 |
A data recovery subsystem for use in a receive system configured to receive a magnetic field signal, the magnetic field signal including a carrier component usable for locating an underground object and at least one modulation sideband. The data recovery subsystem includes a first mixer to mix a Radio Frequency (RF) signal with a first Local Oscillator (LO) signal to produce an Intermediate Frequency (IF) signal representative of the magnetic field signal. A Phase Locked Loop (PLL) phase-locks a second LO signal to an IF carrier component of the IF signal. A second mixer synchronously mixes the IF signal with the second LO signal to produce a baseband signal including a demodulated sideband. |
申请公布号 |
WO03012478(A3) |
申请公布日期 |
2003.09.25 |
申请号 |
WO2002GB03533 |
申请日期 |
2002.08.01 |
申请人 |
RADIODETECTION LIMITED;FLING, RICHARD, WILLIAM;LANFRANCHI, LUIGI |
发明人 |
FLING, RICHARD, WILLIAM;LANFRANCHI, LUIGI |
分类号 |
G01V3/08;H03D3/24;H03D7/16 |
主分类号 |
G01V3/08 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|