Title :
An estimation scheme for integer frequency offsets based on pilot channel estimation in wireless OFDM systems
Author :
Hua, Jingyu ; Xu, Zhijiang ; Meng, Limin ; Li, Gang ; Liu, Banteng
Author_Institution :
Coll. of Inf. Eng.Coll. of Inf. Eng., Zhejiang Univ. of Technol., Hangzhou
Abstract :
This paper presents a novel frequency synchronizator for orthogonal frequency division multiplexing (OFDM) systems over multipath fading channels. With the help of pilot chips and channel estimates in frequency domain, we can analyze the delay power spectrum (DPS) of multipath channels and estimate the integer carrier frequency offset (CFO). Furthermore, the pseudo noise (PN) pilot chips are proposed to extend the estimation range. We verify our algorithm by Monte Carlo simulation, and the results show high accuracy and robustness in a wide range of velocities and signal to noise ratios (SNRs).
Keywords :
OFDM modulation; channel estimation; multipath channels; wireless sensor networks; Monte Carlo simulation; delay power spectrum; estimation scheme; frequency domain; integer carrier frequency offset; integer frequency offsets; multipath fading channels; pilot channel estimation; pseudo noise pilot chips; signal to noise ratios; wireless OFDM systems; Channel estimation; Delay estimation; Fading; Frequency domain analysis; Frequency estimation; Frequency synchronization; Multipath channels; Noise robustness; OFDM; Signal to noise ratio;
Conference_Titel :
Communications, Circuits and Systems, 2008. ICCCAS 2008. International Conference on
Conference_Location :
Fujian
Print_ISBN :
978-1-4244-2063-6
Electronic_ISBN :
978-1-4244-2064-3
DOI :
10.1109/ICCCAS.2008.4657771
