Signal Processing for Energy-Efficient Burst-Mode RF Transmitters (2014)
Abstract / truncated to 115 words
Modern wireless communication systems utilize complex modulated signals such as OFDM signals to achieve increased data rates and spectral efficiency. These signals are characterized by a high peak-to-average-power ratio (PAPR). Thus, highly linear transmitters are required to provide sufficient transmission signal linearity. Conventional linear PAs, such as Class A or Class AB, produce high efficiency only near or at the peak output power region. As a result, the average efficiency is quite low for high PAPR signals. For non-portable devices such as base stations or mobile devices like mobile phones, low PA efficiency means higher heat dissipation which is often a design criterion. In addition, in mobile devices, a direct consequence of the low PA ... toggle 5 keywordsradio frequency (rf) transmitter – pulse width modulation (pwm) – wireless communication – burst-mode operation – efficiency optimization
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