Title :
Hangup in asynchronous timing recovery loops
Abstract :
The effects of hangup in digital asynchronous timing recovery loops are investigated. It is demonstrated that delay quantisation in the interpolation filter exacerbates the problem of hangup. It is also noted that the effects of hangup are worse for the non-data aided (NDA) loops than they are for the decision-directed (DD) loops. This may preclude the use of the former in TDMA applications.
Keywords :
delays; detector circuits; digital radio systems; errors; interpolation; phase shift keying; timing circuits; TDMA applications; asynchronous timing recovery loops; decision-directed loops; delay quantisation; digital loops; hangup; interpolation filter; nondata aided loops;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19931274
