| Paper: | SAM-P6.5 | ||
| Session: | Space-Time Processing for Communications | ||
| Time: | Thursday, May 20, 09:30 - 11:30 | ||
| Presentation: | Poster | ||
| Topic: | Sensor Array and Multichannel Signal Processing: Signal detection and estimation | ||
| Title: | COMPENSATION OF TRANSMITTER IQ IMBALANCE FOR OFDM SYSTEMS | ||
| Authors: | Jan Tubbax; Interuniversity Micro-Electronics Center (IMEC) | ||
| Boris Côme; Interuniversity Micro-Electronics Center (IMEC) | |||
| Liesbet Van der Perre; Interuniversity Micro-Electronics Center (IMEC) | |||
| Stéphane Donnay; Interuniversity Micro-Electronics Center (IMEC) | |||
| Marc Moonen; Katholieke Universiteit Leuven | |||
| Hugo De Man; Interuniversity Micro-Electronics Center (IMEC) | |||
| Abstract: | Zero-IF tranceivers are gaining interest because of their potential to enable low-cost OFDM terminals. However, the Zero-IF architecture introduces IQ imbalance which may have a huge impact on the performance. Rather than increasing component cost to decrease the IQ imbalance, an alternative is to tolerate the IQ imbalance and compensate it digitally. Current solutions require extra analog hardware. In this paper, we analyze the transmit IQ imbalance estimation and propose a low-cost, highly effective, all-digital compensation scheme. Performance analysis shows that this scheme can provide up to 4 dB gain while meeting the WLAN standards' constellation accuracy specification. It therefore enables the design of low-cost, low-complexity OFDM modems. | ||
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