Title :
Performance analysis of OFDM carrier synchronization with diversity
Author :
Tureli, Ufuk ; Ambati, Rajesh ; Kivanc, Didem ; Liu, Hui
Author_Institution :
Electr. & Comput. Eng. Dept., Stevens Inst. of Technol., Hoboken, NJ, USA
Abstract :
Orthogonal frequency division multiplexing (OFDM) carrier frequency synchronization performance under low SNR can be improved by using diversity. We investigate the improvement in synchronization performance using real data obtained on the Stevens wireless testbed. The experimental setup is comprised of a wideband 65 Msamples/second digital to analog converter, a radio frequency (RF) transmitter which transmits at 2.4 GHz frequency with 12 MHz bandwidth and two RF receiver chains whose outputs are sampled at 65 Msamples/sec. Therefore, the receiver can oversample both in time and in space. The sensitivity of the diversity method to sampling clock errors and calibration errors is discussed.
Keywords :
OFDM modulation; channel estimation; computational complexity; diversity reception; frequency estimation; signal sampling; synchronisation; 12 MHz; 2.4 GHz; OFDM carrier synchronization; RF receiver chains; RF transmitter; SNR; Stevens wireless testbed; calibration errors; channel estimation; computational complexity; digital to analog converter; frequency diversity; frequency estimation; orthogonal frequency division multiplexing; sampling clock errors; spatial diversity; Digital-analog conversion; Diversity methods; Frequency synchronization; OFDM; Performance analysis; Radio frequency; Radio transmitters; Receivers; Testing; Wideband;
Conference_Titel :
Vehicular Technology Conference, 2002. Proceedings. VTC 2002-Fall. 2002 IEEE 56th
Print_ISBN :
0-7803-7467-3
DOI :
10.1109/VETECF.2002.1040296
