Hiroshi Komori | Researchain

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Featured researches published by Hiroshi Komori.

symposium on vlsi circuits | 2015

A 60GHz wireless transceiver employing hybrid analog/digital beamforming with interference suppression for multiuser gigabit/s radio access

Koji Takinami; Naganori Shirakata; Koichiro Tanaka; Takayuki Tsukizawa; Hiroyuki Motozuka; Yohei Morishita; Kenji Miyanaga; Takenori Sakamoto; Tomoya Urushihara; Masashi Kobayashi; Hiroshi Takahashi; Masataka Irie; Hiroyuki Yoshikawa; Atsushi Yoshimoto; Masatake Irie; Maki Nakamura; Takeaki Watanabe; Hiroshi Komori; Noriaki Saito

This paper presents a 60GHz analog/digital beamforming transceiver that effectively suppresses interference signals, targeting WiGig/IEEE 802.11ad standard. A prototype has been built with 40nm CMOS analog front-ends as well as offline baseband digital signal processing. Measurement shows 3.1dB EVM advantage over the conventional two-stream diversity during a packet collision situation.

symposium on vlsi circuits | 2014

A PVT-variation tolerant fully integrated 60 GHz transceiver for IEEE 802.11ad

Takayuki Tsukizawa; Atsushi Yoshimoto; Hiroshi Komori; Kenji Miyanaga; Ryo Kitamura; Yohei Morishita; Masatake Irie; Yoichi Nagaso; Takeaki Watanabe; Koji Takinami; Noriaki Saito

A PVT tolerant fully integrated 60 GHz transceiver for IEEE 802.11ad is presented. By introducing a newly proposed self-sensing LDO, the transceiver adjusts bias currents and the LDO output voltage for the PA to minimize the output power variation while relaxing the hot carrier injection (HCI) degradation. The measurement shows excellent robustness against PVT variations, demonstrating only 5 dB output power variation over -20 °C to 85 °C across process corners.

Archive | 2005