Title :
Improving Costas loop pull in range using pseudo BER detector
Author :
Peric, Miroslav ; Manojlovic, Predrag ; Peric, Dragana
Author_Institution :
Inst. of Microwave Techniques & Electron., Novi Beograd, Serbia
fDate :
6/23/1905 12:00:00 AM
Abstract :
This paper describes a method for improving pull in range for the four-phase version of a Costas loop. The basic idea is that a pseudo bit error ratio (PBER) detector is used for fast detection of loop synchronization loss, and to trigger the frequency-sweeping circuitry. After synchronization is achieved the PBER detector detects the small BER and switches off the sweeping circuitry. Several types of PBER detector are considered and experimentally tested. One version is implemented in IMTEL´s (Institute for Microwave Techniques and Electronics) digital radio relay systems (DRRS) RRU13A and RRU23A
Keywords :
digital phase locked loops; digital radio; error statistics; radio receivers; synchronisation; Costas loop pull in range; RRU13A; RRU23A; digital radio relay systems; four-phase version; frequency-sweeping circuitry; pseudo BER detector; pseudo bit error ratio detector; synchronization loss; Bit error rate; Circuit testing; Detectors; Digital communication; Digital relays; Frequency synchronization; Microwave theory and techniques; Radiofrequency integrated circuits; Switches; Switching circuits;
Conference_Titel :
Telecommunications in Modern Satellite, Cable and Broadcasting Service, 2001. TELSIKS 2001. 5th International Conference on
Conference_Location :
Nis
Print_ISBN :
0-7803-7228-X
DOI :
10.1109/TELSKS.2001.955880
