Title :
A frequency and symbol synchronization system for OFDM signals: architecture and simulation results
Author :
Santella, Giovanni
Author_Institution :
Fondazione Ugo Bordoni, Rome, Italy
fDate :
1/1/2000 12:00:00 AM
Abstract :
A data-aided frequency and symbol synchronization scheme for M-QAM OFDM signals is suggested. At first, the phase discriminator (PD) and frequency discriminator (FD) for, respectively, the symbol and frequency synchronization loop are described. Second, the transfer function and design parameters of the loop filters are provided. The acquisition and tracking performance of the synchronization system are evaluated using simulation for a 4-PSK signal constellation. The cases of additive white Gaussian noise (AWGN) and frequency and time selective multipath Rayleigh channels are separately tested
Keywords :
AWGN channels; OFDM modulation; Rayleigh channels; digital simulation; discriminators; multipath channels; phase shift keying; quadrature amplitude modulation; synchronisation; tracking; 4-PSK signal constellation; AWGN; M-QAM OFDM signals; acquisition performance; additive white Gaussian noise; data-aided frequency synchronization system; data-aided symbol synchronization system; design parameters; frequency discriminator; frequency selective multipath Rayleigh channel; frequency synchronization loop; loop filters; phase discriminator; simulation; simulation results; symbol synchronization loop; system architecture; time selective multipath Rayleigh channel; tracking performance; transfer function; AWGN; Additive white noise; Constellation diagram; Filters; Frequency synchronization; OFDM; Quadrature phase shift keying; Rayleigh channels; Testing; Transfer functions;
Journal_Title :
Vehicular Technology, IEEE Transactions on
