Title :
The frequency offset algorithm of the multi-user access for OFDM systems
Author :
Ma, Zhangyong ; Kim, Young-il
Author_Institution :
Electron. & Telecommun. Res. Inst., Daejeon, South Korea
Abstract :
Multi-user access for the OFDM system is more sensitive to frequency offset than the broadcast access of OFDM. In this paper, the frequency synchronization algorithm according to the maximum-likelihood rule is discussed particularly which is based on the preambles of each frame specified by Hpi specification. Some theoretical analysis illustrates the algorithms is unbiased. The simulation results and emulation results based on DSP show that the proposed algorithm can estimate the frequency offset accurately.
Keywords :
Internet; OFDM modulation; internetworking; maximum likelihood detection; multiuser detection; synchronisation; DSP; Hpi specification; OFDM systems; broadcast access; emulation; frame preambles; frequency offset algorithm; frequency synchronization algorithm; high speed internet system; maximum-likelihood rule; multi-user access; simulation; Algorithm design and analysis; Broadcasting; Digital signal processing; Downlink; Emulation; Frequency estimation; Frequency synchronization; Internet; Maximum likelihood estimation; OFDM;
Conference_Titel :
Vehicular Technology Conference, 2004. VTC2004-Fall. 2004 IEEE 60th
Print_ISBN :
0-7803-8521-7
DOI :
10.1109/VETECF.2004.1404687
