Title :
Fast frequency tracking algorithm for OFDM applications
Author :
Lei, JingLei ; Ng, Tung-Sang
Author_Institution :
Dept. of Electr. & Electron. Eng., Hong Kong Univ., China
Abstract :
In this paper, we present a fast frequency tracking algorithm for orthogonal frequency division multiplexing (OFDM) applications. Based on a novel cost function of the carrier frequency offset (CFO), an improved gradient method is proposed to construct the recursive formula. The modified S curve is also employed for the purpose of accelerating frequency tracking. Performance of the proposed algorithm is investigated analytically as well as by simulation. In comparison to the previous methods, the proposed method has faster tracking speed, larger tracking range and lower implementation complexity.
Keywords :
OFDM modulation; frequency measurement; gradient methods; tracking; CFO; OFDM applications; accelerated frequency tracking; carrier frequency offset; cost function; fast frequency tracking algorithm; gradient method; implementation complexity; modified S curve; orthogonal frequency division multiplexing; recursive formula; simulation; tracking range; tracking speed; Acceleration; Algorithm design and analysis; Baseband; Cost function; Digital audio broadcasting; Frequency synchronization; Gradient methods; OFDM; Satellite broadcasting; TV broadcasting;
Conference_Titel :
Circuits and Systems, 2002. APCCAS '02. 2002 Asia-Pacific Conference on
Print_ISBN :
0-7803-7690-0
DOI :
10.1109/APCCAS.2002.1115153
