Title :
A joint time-frequency synchronization algorithm for FrFT-OFDM systems and its hardware implementation
Author :
Jiadong Shang ; Zulin Wang ; Lina Zhou ; Lei Zhao
Author_Institution :
Beijing Univ. of Aeronaut. & Astronaut., Beijing, China
Abstract :
In this paper, a novel joint time-frequency synchronization algorithm was developed for orthogonal frequency division multiplexing systems based on fraction Fourier transform (FrFT-OFDM) in multipath fading channel. It can eliminate the ambiguity of the first arriving path estimation in multipath channels. And the digital synchronization structure implementation based on the proposed algorithm for FrFT-OFDM is also presented here, which can reduce the hardware resource by 46% compared with traditional structure. Results of simulation show that the proposed scheme can provide more precise CFO and TO estimation with less resource consumption.
Keywords :
Fourier transforms; OFDM modulation; fading channels; field programmable gate arrays; synchronisation; FrFT-OFDM systems; TO estimation; carrier frequency offset; fraction Fourier transform; hardware implementation; joint time-frequency synchronization algorithm; multipath channel; multipath fading channel; orthogonal frequency division multiplexing systems; path estimation; Estimation; Frequency synchronization; Joints; OFDM; Synchronization; Time-frequency analysis; Carrier frequency offset; Division free algorithm; Joint time-frequency synchronization; LFM signal; twisted memory access;
Conference_Titel :
Communication Technology (ICCT), 2013 15th IEEE International Conference on
Conference_Location :
Guilin
DOI :
10.1109/ICCT.2013.6820370