A 1024-QAM capable WLAN receiver with −56.3 dB image rejection ratio using self-calibration technique
| Autor: | Shigehito Saigusa, Shusuke Kawai, Ichiro Seto, Toshiyuki Yamagishi, Yosuke Hagiwara, Shuichi Ito, Shoji Otaka |
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| Rok vydání: | 2017 |
| Předmět: |
Radio receiver design
Calibration (statistics) Orthogonal frequency-division multiplexing Computer science 020208 electrical & electronic engineering MIMO Loopback 020302 automobile design & engineering 02 engineering and technology Noise (electronics) Electronic Optical and Magnetic Materials Image response QAM Channel capacity 0203 mechanical engineering Modulation 0202 electrical engineering electronic engineering information engineering Baseband Electronic engineering Electrical and Electronic Engineering |
| Zdroj: | ISCAS |
| DOI: | 10.1109/iscas.2017.8050600 |
| Popis: | This paper presents a 1024-QAM OFDM signal capable WLAN receiver in 65 nm CMOS technology. Thermal noise-based IQ frequency-independent mismatch correction and IQ frequency-dependent mismatch correction with baseband loopback are proposed for the self-calibration in the receiver. By using proposed calibration method, neither received external signal nor RF loopback are necessary and the residual IQ mismatch of TXBB can be removed. The measured image rejection ratio of the self-calibration is −56.3 dB. The receiver achieves the extremely low EVM of −37.1 dB even with wide channel bandwidth of 80 MHz and has the ability to receive the 1024-QAM signal. The result indicates that the receiver is extendable for the 802.11ax compliant receiver that supports a higher density modulation scheme of MIMO. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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