Title :
Performance analysis of STBC-OFDM transmit diversity with phase noise and imperfect channel estimation
Author :
Jalloh, Mohamed ; Das, Pankaj
Author_Institution :
Univ. of California, San Diego, CA
Abstract :
In this paper, we investigate the effects of RF impairments and imperfect channel estimation (ICE) on the performance of quadrature amplitude modulation (QAM) for orthogonal frequency division multiplexing (OFDM) systems employing transmit diversity with two transmit antennas and one receive antenna in a Rayleigh fading environment. We derive the bit error rate (BER) expressions of space-time block codes (STBC)-OFDM system using the Alamouti code. Although the analysis is presented for 16-QAM, it can be easily extended to higher order square QAM constellations. Simulation results are also presented to illustrate the extent of the effects on system performance degradation, with emphasis given to the IEEE 802.16e standard.
Keywords :
OFDM modulation; Rayleigh channels; WiMax; block codes; channel estimation; diversity reception; error statistics; phase noise; quadrature amplitude modulation; receiving antennas; space-time codes; transmitting antennas; 16-QAM; Alamouti code; BER expressions; IEEE 802.16 standard; RF impairments; Rayleigh fading environment; STBC-OFDM transmit diversity; WiMax; bit error rate expressions; higher order square QAM constellations; imperfect channel estimation; orthogonal frequency division multiplexing systems; phase noise; quadrature amplitude modulation; receive antenna; space-time block codes; transmit antennas; Bit error rate; Channel estimation; Ice; OFDM; Performance analysis; Phase noise; Quadrature amplitude modulation; Radio frequency; Receiving antennas; Transmitting antennas;
Conference_Titel :
Military Communications Conference, 2008. MILCOM 2008. IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
978-1-4244-2676-8
Electronic_ISBN :
978-1-4244-2677-5
DOI :
10.1109/MILCOM.2008.4753353
