Title :
AC-coupling and 1/f noise effects on baseband OFDM signals
Author :
Georgiadis, Apostolos
Author_Institution :
Commun. Eng. Dept., Cantabria Univ., Santander
Abstract :
The effect of AC-coupling and 1/f noise on baseband orthogonal frequency-division multiplexing (OFDM) signals is investigated. A system model that employs features of the packet format of existing wireless communication standards is used. The model assumes sampling and frequency-estimation errors at the receiver, and also imperfect channel-response estimation. The error vector magnitude (EVM) is selected as the performance evaluation criterion due to the simplicity in its evaluation, and because it allows for an easier comparison with the standards specifications. Simulation results are presented along with analytical expressions for the EVM, which provide system-design guidelines. Finally, simulation results are used to observe the intersymbol interference that is introduced as the AC-coupling filter impulse response exceeds the guard interval of the OFDM symbols
Keywords :
1/f noise; OFDM modulation; channel estimation; filtering theory; frequency estimation; intersymbol interference; radio networks; signal sampling; transient response; 1/f noise effects; AC-coupling filter impulse response; baseband OFDM signals; baseband orthogonal frequency-division multiplexing signals; error vector magnitude; frequency-estimation errors; imperfect channel-response estimation; intersymbol interference; packet format; system-design guidelines; wireless communication standards; Analytical models; Baseband; Communication standards; Frequency division multiplexing; Frequency estimation; Guidelines; Intersymbol interference; OFDM; Sampling methods; Wireless communication; AC-coupling; error vector magnitude (EVM); orthogonal frequency-division multiplexing (OFDM);
Journal_Title :
Communications, IEEE Transactions on
DOI :
10.1109/TCOMM.2006.881367
