Title :
DSP-based clock recovery for a digital magnetic data channel
Author :
Smithson, P.M. ; Tomlinson, M. ; Donnelly, T.
Author_Institution :
Centre for Res. in Inf. Storage Technol., Plymouth Univ., UK
fDate :
28 Nov- 2 Dec 1994
Abstract :
A DSP-based clock recovery system for a digital magnetic recording channel is presented which utilises an infinite impulse response (IIR) filter. The performance has been evaluated using software simulation, verified in real-time operation on a Texas Instruments TMS320C25 processor. Data coded in Manchester, Miller, Miller and 2,7 codes have been applied. In each case synchronization is achieved within the first symbol period even in the presence of jitter. The system can withstand data dropouts of 40 bit periods without losing synchronization. This can be increased when filter sections are cascaded
Keywords :
IIR filters; codes; digital magnetic recording; filtering theory; signal processing; synchronisation; telecommunication channels; DSP-based clock recovery system; Manchester code; Miller codes; Texas Instruments TMS320C25 processor; cascaded filter sections; data dropouts; digital magnetic data channel; digital magnetic recording channel; impulse response filter; jitter; performance evaluation; real-time operation; software simulation; symbol period; synchronization; Clocks; Frequency synchronization; IIR filters; Information retrieval; Instruments; Logic; Phase locked loops; Propagation delay; Space technology; Workstations;
Conference_Titel :
Global Telecommunications Conference, 1994. GLOBECOM '94. Communications: The Global Bridge., IEEE
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-1820-X
DOI :
10.1109/GLOCOM.1994.513020
