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

Volume

3

fYear

1994

fDate

28 Nov- 2 Dec 1994

Firstpage

1467

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference, 1994. GLOBECOM '94. Communications: The Global Bridge., IEEE

Conference_Location

San Francisco, CA

Print_ISBN

0-7803-1820-X

Type

conf

DOI

10.1109/GLOCOM.1994.513020

Filename

513020