1. An IR-UWB IEEE 802.15.4z Compatible Coherent Asynchronous Polar Transmitter in 28-nm CMOS.
- Author
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Singh, Gaurav, Allebes, Erwin, He, Yuming, Tiurin, Evgenii, Mateman, Paul, Dijkhuis, Johan F., van Schaik, Gert-Jan, Bechthum, Elbert, van den Heuvel, Johan, El Soussi, Mohieddine, Breeschoten, Arjan, Korpela, Hannu, Gordebeke, Gert-Jan, Lemey, Sam, Bachmann, Christian, and Liu, Yao-Hong
- Subjects
TRANSMITTERS (Communication) ,COMPLEMENTARY metal oxide semiconductors ,PHASE modulation ,POWER amplifiers ,MASK laws - Abstract
A low-power IEEE 802.15.4z high-rate PHY (HRP) compatible coherent transmitter is described. The proposed transmitter uses a digital polar architecture with fixed amplitude steps in the power amplifier and asynchronous time-discrete pulse shaping. The pulse-shaping unit consists of a finite-impulse response (FIR) filter using current-starved inverter-based delay taps that can be calibrated on-chip. An injection-locked ring oscillator (ILRO)-based frequency synthesis enables wideband operation from 3- to 10-GHz frequency bands. The ILRO also allows for duty-cycled coherent mode operation with 2–4-ns phase locking time and binary phase modulation is applied directly on the oscillator. The on-chip digital front end enables duty cycling (DC) of analog front-end modules with a granularity of 2 ns. Implemented in 28-nm CMOS process, this chip is measured to consume 4.9-mW power in nominal mode with IEEE 802.15.4z high pulse repetition frequency (HPRF) compatible data rate of 6.81 Mb/s compliant with major spectrum mask regulations for channels 5 and 9. With DC of the oscillator enabled in the energy-efficient mode, a power consumption of $430~\mu \text{W}$ is achieved for packets compatible with legacy pulse-position-modulated IEEE 802.15.4a standard with a data rate of 27.2 Mb/s. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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