Maki Nakamura
Panasonic
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by Maki Nakamura.
symposium on vlsi circuits | 2015
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.
international microwave symposium | 2010
Takayuki Tsukizawa; Maki Nakamura; Gary Do; Masatoshi Igarashi; Kaoru Ishida
In this paper, a new 3G/GSM/EDGE multi-mode/multi-band transceiver that achieves both the elimination of TX-SAW filter and the isolator using an open-loop polar modulation transmitter is presented. Sufficient ACLR performance is accomplished by a combination of parts-to-parts calibration and temperature offset compensation. ACLR meets 3GPP target specification at VSWR=3∶1, with Rx band noise at PA output in UMTS band I of −132.3dBm/Hz thus does not degrade receiver sensitivity. This paper includes design details and experimental results.
international microwave symposium | 2011
Maki Nakamura; Tomoya Urushihara; Gary Do; Masatoshi Igarashi; Kaoru Ishida
Generally low power region is very dominant for current consumption on UMTS handsets. However, a polar modulation architecture has a little bit lager current consumption in this region. So, we propose polar/quadrature modulation architecture with a fast-feedback power control technique “power alignment loop (PAL)”. The PAL can realize accurate UMTS power transition over the two different modulation modes. Measurement results shows that the power accuracy between the two modes can satisfy the 3GPP standard within 25 µs from the slot boundary. The average current consumption of the transmitter is 128 mA at the battery.
Archive | 2009
Maki Nakamura; Kaoru Ishida
Archive | 2005
Maki Nakamura; Mamoru Arayashiki
Archive | 2016
Ryosuke Shiozaki; Maki Nakamura; Junji Sato
Archive | 2007
Maki Nakamura; Shigeru Morimoto
Archive | 2014
Maki Nakamura; Suguru Fujita
Archive | 2009
Kaoru Ishida; Maki Nakamura; 真木 中村; 石田 薫
Archive | 2007
Maki Nakamura; Shigeru Morimoto