Title :
Efficient joint frequency synchronization and channel estimation in OFDM systems
Author :
Jamalabdollahi, Mohsen ; Salari, Soheil ; Zahedi, Behnam
Author_Institution :
Fac. of Electr. & Comput. Eng., K.N. Toosi Univ. of Technol., Tehran, Iran
Abstract :
The problem of joint carrier frequency offset (CFO) and channel estimation in orthogonal frequency division multiplexing (OFDM) systems is investigated in this study. The exact solution to this problem turns out to be too complex for practical purposes. To overcome this difficulty, we resort to the recursive least square (RLS) algorithm and propose an iterative scheme which iterates between estimating the channel parameters and the frequency offset. This results in an estimation algorithm of a reasonable complexity which is suitable for practical applications.
Keywords :
OFDM modulation; channel estimation; computational complexity; frequency estimation; iterative methods; least squares approximations; recursive estimation; synchronisation; CFO; OFDM systems; RLS algorithm; channel estimation; channel parameters; efficient joint frequency synchronization; estimation algorithm; exact solution; iterative scheme; joint carrier frequency offset; orthogonal frequency division multiplexing systems; reasonable complexity; recursive least square algorithm; Channel estimation; Estimation; Frequency estimation; Joints; OFDM; Signal processing algorithms; Time domain analysis; Orthogonal frequency-division multiplexing (OFDM); carrier frequency offset (CFO); channel impulse response (CIR); recursive least square (RLS) algorithm;
Conference_Titel :
Signal Processing and Communications Applications (SIU), 2011 IEEE 19th Conference on
Conference_Location :
Antalya
Print_ISBN :
978-1-4577-0462-8
Electronic_ISBN :
978-1-4577-0461-1
DOI :
10.1109/SIU.2011.5929623
