TW200638699A - Carrier recovery device for high-order QAM signals and the method thereof - Google Patents

Carrier recovery device for high-order QAM signals and the method thereof

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Publication number
TW200638699A
TW200638699A TW094113706A TW94113706A TW200638699A TW 200638699 A TW200638699 A TW 200638699A TW 094113706 A TW094113706 A TW 094113706A TW 94113706 A TW94113706 A TW 94113706A TW 200638699 A TW200638699 A TW 200638699A
Authority
TW
Taiwan
Prior art keywords
recovery device
carrier recovery
detector
qam signals
carrier
Prior art date
Application number
TW094113706A
Other languages
Chinese (zh)
Other versions
TWI293836B (en
Inventor
Yuan Chen
Hsin-An Hou
Original Assignee
Ind Tech Res Inst
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ind Tech Res Inst filed Critical Ind Tech Res Inst
Priority to TW94113706A priority Critical patent/TWI293836B/en
Publication of TW200638699A publication Critical patent/TW200638699A/en
Application granted granted Critical
Publication of TWI293836B publication Critical patent/TWI293836B/en

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  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

The disclosed is a carrier recovery device for high-order QAM signals and the method thereof. It overcomes the drawbacks of slow convergent rate occurred in conventional carrier recovery techniques for high-order QAM signals. The carrier recovery device comprises a mixer, a dual mode phase detector, a loop filter, a recovery detector, and a numerically controlled oscillator. With adding a frequency detector in the recovery detector, the earner recovery device increases the accuracy and speed of carrier lock. The frequency detector has a simple circuit. The frequency detector and the phase detector can be integrated as a single loop. Therefore, the carrier recovery device can achieve the carrier recovery with a fast speed and a wide range at a low complexity of hardware.
TW94113706A 2005-04-28 2005-04-28 Carrier recovery device for high-order qam signals and the method thereof TWI293836B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
TW94113706A TWI293836B (en) 2005-04-28 2005-04-28 Carrier recovery device for high-order qam signals and the method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW94113706A TWI293836B (en) 2005-04-28 2005-04-28 Carrier recovery device for high-order qam signals and the method thereof

Publications (2)

Publication Number Publication Date
TW200638699A true TW200638699A (en) 2006-11-01
TWI293836B TWI293836B (en) 2008-02-21

Family

ID=45067981

Family Applications (1)

Application Number Title Priority Date Filing Date
TW94113706A TWI293836B (en) 2005-04-28 2005-04-28 Carrier recovery device for high-order qam signals and the method thereof

Country Status (1)

Country Link
TW (1) TWI293836B (en)

Also Published As

Publication number Publication date
TWI293836B (en) 2008-02-21

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Legal Events

Date Code Title Description
MM4A Annulment or lapse of patent due to non-payment of fees