Title :
Comparison of QPSK and 64QAM EVM for an OFDM WLAN signal at 2.4 GHz and 4.9 GHz in a multipath environment
Author :
McKinley, M.D. ; Remley, Kate A. ; Kenney, J. ; Myslinski, M. ; Koepke, Galen ; Camell, Dennis ; Johnk, Robert T.
Author_Institution :
Georgia Inst. of Technol., Atlanta, GA, USA
Abstract :
In this work, we verify experimentally the consistency of EVM across modulation types of orthogonal frequency-division multiplexed (OFDM) wireless local-area network (WLAN) signals in two dedicated laboratory setups. We compared EVMs obtained for different modulation types in both an idealized distortion-free and a realistic multipath environment. Our goal is to study the effect of signal impairments on the constellation diagram through EVM, although other figures of merit, such as bit-error rate (BER) or energy-per-bit to spectral-noise density (EbN0), could be studied as well.
Keywords :
OFDM modulation; error statistics; quadrature amplitude modulation; quadrature phase shift keying; wireless LAN; 64QAM; BER; EVM; OFDM WLAN signal; QPSK; bit-error rate; error vector magnitude; frequency 2.4 GHz to 4.9 GHz; multipath environment; orthogonal frequency-division multiplexing; quadrature amplitude modulation; quadrature phase shift keying; wireless local-area network; Antenna measurements; Directional antennas; Distortion measurement; OFDM modulation; Quadrature amplitude modulation; Quadrature phase shift keying; Signal analysis; Signal generators; Telecommunication standards; Wireless LAN;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2009. APSURSI '09. IEEE
Conference_Location :
Charleston, SC
Print_ISBN :
978-1-4244-3647-7
DOI :
10.1109/APS.2009.5172099
