Comparator Offset Immune I/Q Calibration Technique for Direct Conversion Receiver
| Autor: | Xiaoming Liu, Jing Jin, Jijian Shi, Jianjun Zhou |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Physics
Offset (computer science) Comparator business.industry 020206 networking & telecommunications Ranging 02 engineering and technology Condensed Matter Physics Image response Direct-conversion receiver Optics Wideband signal 0202 electrical engineering electronic engineering information engineering Wireless Electrical and Electronic Engineering business Error detection and correction |
| Zdroj: | IEEE Microwave and Wireless Components Letters. 30:109-111 |
| ISSN: | 1558-1764 1531-1309 |
| DOI: | 10.1109/lmwc.2019.2954211 |
| Popis: | A comparator offset immune and area-efficient In-phase and Quadrature (I/Q) mismatch calibration technique is proposed for direct conversion receivers in the letter. Theoretical analysis is provided to explain the independence between comparator offset and error detection accuracy. For verifying the proposed method, a receiver front-end prototype, along with the proposed I/Q mismatch calibration, is designed and fabricated in the 0.18- $\mu \text{m}$ technology. Experimental results show that Image Rejection Ratio (IRR) is 61.99 dB @15 MHz with a comparator offset ranging from 0 to 14 mV. And IRR for a wideband signal from 5 to 25 MHz is enhanced from 31.6 to 43.3 dB after calibration. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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