A Comparison of Polar and Quadrature RF-PWM
| Autor: | Tahir Malik, Ted Johansson, Muhammad Touqir Pasha, Muhammad Fahim Ul Haque |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Signal processing
Computer science 020208 electrical & electronic engineering 020206 networking & telecommunications 02 engineering and technology Signal Computer Science::Other Quadrature (mathematics) Modulation Telecommunications link 0202 electrical engineering electronic engineering information engineering Baseband Electronic engineering Radio frequency Pulse-width modulation |
| Zdroj: | NORCAS |
| DOI: | 10.1109/norchip.2018.8573456 |
| Popis: | All-digital implementations of PWM-based wireless transmitters are gaining popularity. Unlike baseband PWM, RF-PWM has relaxed filtering requirements and is preferred due to a smaller chip size. This paper is aimed to highlight the differences between polar and quadrature implementations of RF-PWM-based transmitters. Using mathematical models and simulations, performance of the two implementations is compared. The mathematical analysis indicates that the quadrature implementation is expected to have higher quantization noise compared to the polar because of the shorter duty cycles at maximum amplitude. The simulations, using a 10 MHz LTE uplink signal at 2 GHz carrier frequency, confirm this and also show the effect of RF pulse swallowing on the error vector magnitude (EVM). |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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