Morse Micro details WiFi HaLoW transceiver technology
Morse Micro has detailed the transceiver technology in its HaLoW long range sub-GHz WiFi chip.
The MM8108 Wi-Fi SoC provides an integrated PA capable of regulatory-compliant 26dBm for BPSK and 19dBm for 256-QAM. This is a 4x the efficiency in existing CMOS OFDM transmitters, cutting power consumption by 75%, and dramatically extending battery life for IoT and edge devices.
The MM8108 integrates a Digital Power Amplification (DPA), Multi-Way Doherty architecture, and Digital Pre-Distortion (DPD).
Rather than employing a conventional two-way Doherty architecture, the PA is divided into multiple sub-arrays. Each sub-array provides an efficiency optimum at different back-off points, resulting in higher average efficiency when transmitting high-PAPR signals.
Adjusting the supply voltage, rather than relying solely on code-based back-off, preserves efficiency at reduced output powers. For example, dropping the supply from 1.8 V to 0.45 V achieves a 12 dB reduction in peak power with less efficiency penalty than conventional methods.
These technologies optimize power efficiency, ensuring high performance, extended range, and low power dissipation in a single chip.
The MM8108 has been used for the demonstrations of a 3km link in urban areas and 16km in rural desert areas.
“This is a breakthrough moment for Morse Micro and for Wi-Fi HaLow,” said Michael De Nil, co-founder and CEO of Morse Micro. “We’ve built the most efficient transmitter in the world – something no one else has achieved. The launch of the MM8108 earlier this year, and the launch of this whitepaper today, prove that world-class semiconductor innovation isn’t just happening in Silicon Valley – it’s happening in Australia. We’re proud to be putting Australian engineering at the forefront of next-generation Wi-Fi and showing the world what we can do.”
The WiFi HaLoW paper is at www.morsemicro.com/mm8108-transmitter-efficiency
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