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1. (WO2013110336) INTERFERENCE ROBUST CLOCK RECOVERY

Pub. No.:    WO/2013/110336    International Application No.:    PCT/EP2012/051261
Publication Date: Fri Aug 02 01:59:59 CEST 2013 International Filing Date: Fri Jan 27 00:59:59 CET 2012
IPC: H04L 7/00
H04L 7/02
H04L 25/03
Applicants: TELEFONAKTIEBOLAGET L M ERICSSON (publ)
RYDSTRÖM, Mats
WEINHOLT, Dan
Inventors: RYDSTRÖM, Mats
WEINHOLT, Dan
Title: INTERFERENCE ROBUST CLOCK RECOVERY
Abstract:
The invention relates to a clock recovery device and method for establishing synchronization with a received communication signal. The invention is based on a two-state clock recovery mechanism. When in a first state, whenever the receiver is not synchronized, the clock recovery mechanism is handled by a Gardner detector coupled with interference suppression, while when in a second state, whenever the receiver is synchronized, the clock recovery mechanism is handled by an early-late detector, re-using loop filters and interfaces of the Gardner detector. In this way the clock recovery device may accurately synchronize even in cases with strong external interference.