| Paper: | SPCOM-P12.7 | ||
| Session: | Detection, Estimation, and Demodulation | ||
| Time: | Friday, May 21, 13:00 - 15:00 | ||
| Presentation: | Poster | ||
| Topic: | Signal Processing for Communications: Multi-Carrier, OFDM, and DMT Systems | ||
| Title: | ON THE BASEBAND COMPENSATION OF IQ IMBALANCES IN OFDM SYSTEMS | ||
| Authors: | Alireza Tarighat; University of California, Los Angeles | ||
| Ali Sayed; University of California, Los Angeles | |||
| Abstract: | OFDM is a widely recognized and standardized modulation scheme for future high bit rate communications. Implementation of OFDM-based systems suffers from Inphase-Quadrature phase (IQ) imbalances in the front-end analog processing. The IQ imbalances can severely limit the operating SNR, and consequently the supported constellation sizes. In this paper, the effect of IQ imbalances on OFDM receivers is formulated and systematically analyzed, and system level algorithms to compensate for these distortions are proposed. The algorithms include different post-FFT and pre-FFT estimation and correction techniques. | ||
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