Title :
A study of test time reduction of FIR tap optimization with LMS algorithm in recording head testing process
Author :
Boonserm, Kitiyaporn ; Sivaratana, Roong ; Pornpitakpong, Kridsada ; Supnithi, Pornchai
Author_Institution :
Fac. of Eng., King Mongkut´´s Inst. of Technol. Ladkrabang, Bangkok, Thailand
Abstract :
In this paper, we propose the use of adaptive equalizer to reduce recording head test time by employing the least mean-squared (LMS) algorithm to adapt the filter coefficients to search for the optimal coefficients. The effects of signal-to-noise ratio (SNR), step size and resolution on the convergent time are investigated. The comparison between the conventional combinatorial-based method and the LMS method show that for current read channel specification, the proposed method requires test time less than 30% than the conventional approach depending on the initial deviation from the recommended coefficient values.
Keywords :
FIR filters; adaptive equalisers; least mean squares methods; magnetic recording; FIR tap optimization; adaptive equalizer; current read channel specification; filter coefficients; least mean-squared algorithm; optimal coefficients searching; recording head testing process; signal-to-noise ratio; test time reduction; Adaptive equalizers; Adaptive filters; Bit error rate; Data engineering; Finite impulse response filter; Least squares approximation; Magnetic heads; Optimization methods; Registers; Testing;
Conference_Titel :
Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology, 2009. ECTI-CON 2009. 6th International Conference on
Conference_Location :
Pattaya, Chonburi
Print_ISBN :
978-1-4244-3387-2
Electronic_ISBN :
978-1-4244-3388-9
DOI :
10.1109/ECTICON.2009.5137250
