Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Toru Maniwa"'
Autor:
Toru Maniwa, Alexander N. Lozhkin
Publikováno v:
VTC-Fall
In this paper, we propose a novel subarray digital predistorter (DPD) with timely shared feedback for hybrid beamforming transmitters. This enables a set of power amplifiers (PAs) to be linearized with a single DPD. The output signal in the proposed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3443f0bcc8ffe2b2ff4c23b524558c30
https://doi.org/10.1109/vtc2020-fall49728.2020.9348469
https://doi.org/10.1109/vtc2020-fall49728.2020.9348469
Publikováno v:
WPMC
The adaptive digital predistorter (DPD) offers an effective technique for compensating for nonlinear distortion and improving the efficiency of high power amplifiers (HPAs). However, in small cell environments, the power consumed by the DPD is no lon
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f1ae459100e1bceb093dfeabefa3379f
https://doi.org/10.1109/wpmc48795.2019.9096126
https://doi.org/10.1109/wpmc48795.2019.9096126
Autor:
Hiroyoshi Ishikawa, Ken Tamanoi, Masahiko Shimizu, Tomoya Ota, Toshio Kawasaki, Shigekazu Kimura, Toru Maniwa
Publikováno v:
2018 Asia-Pacific Microwave Conference (APMC).
This paper proposes a novel adaptive multi-band look-up table (LUT)-based digital predistorter (DPD) with a single common feedback loop for concurrent multi-band power amplifiers (PAs). The proposed DPD reduces the total complexity to one-hundredth b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b4054bdc517230dcc46966c103b4ff27
https://doi.org/10.23919/apmc.2018.8617473
https://doi.org/10.23919/apmc.2018.8617473
Publikováno v:
PIMRC
Modified versions of unified digital predistortion (DPD) architecture for beamforming transmitter are studied. They perform nonlinear compensation and crest factor reduction for limited streams considering the difference of the amplitude weights. To
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0dfa80861901b51b2cb007384e47b443
https://doi.org/10.1109/pimrc.2018.8580790
https://doi.org/10.1109/pimrc.2018.8580790
Autor:
Toru Maniwa, Masahiko Shimizu, Makoto Yoshida, Shigekazu Kimura, Tomoya Ota, Ken Tamanoi, Toshio Kawasaki
Publikováno v:
PIMRC
This paper proposes how to modify the reduced-complexity multi-band digital predistorter (DPD) with a single common feedback loop we previously proposed, in order to compensate for nonlinear distortions significantly where imperfection of the analog
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a70c070b3d734b1a2302d6620baa7b55
https://doi.org/10.1109/pimrc.2018.8581002
https://doi.org/10.1109/pimrc.2018.8581002
Publikováno v:
PIMRC
With the development of millimeter wave communication technologies in 5G mobile communication systems, a large number of small cells will be deployed to form 5G high-capacity ultra-dense networks. Therefore the energy efficiency should be a main desi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d9e3b8f29d0d81ff1a7549bdf5e874c1
https://doi.org/10.1109/pimrc.2018.8580717
https://doi.org/10.1109/pimrc.2018.8580717
Publikováno v:
2017 IEEE Asia Pacific Microwave Conference (APMC).
This paper proposes a reduced complexity digital predistorter (DPD) with a single common feedback loop for concurrent multi-band power amplifiers (PAs). Some multi-band DPD schemes with a single common feedback loop have been proposed; however the co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2ca118adb855aa0d26277104a26f932b
https://doi.org/10.1109/apmc.2017.8251516
https://doi.org/10.1109/apmc.2017.8251516
Publikováno v:
PIMRC
This paper presents the design of a RF pulse width (PW) modulator for switched-mode power amplification of varying envelope signals such as CDMA or OFDM. The low level of spectral regrow in RF PW modulated signal is ensured by RF pulse swallowing pre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::77598d05b55fbab2ed78affd3c77ef98
https://doi.org/10.1109/pimrc.2017.8292192
https://doi.org/10.1109/pimrc.2017.8292192
Publikováno v:
PIMRC
This paper proposes a novel scheme of digital predistorter (DPD) that can concurrently compensate for both the odd-order distortions and the even-order distortions for concurrent multi-band power amplifiers (PAs) at low super high frequency (SHF) and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::516aba5661494cca58bbf1d2e6cee661
https://doi.org/10.1109/pimrc.2017.8292178
https://doi.org/10.1109/pimrc.2017.8292178
Autor:
Toshihide Kikkawa, Hiroyuki Hayashi, Kiyomichi Araki, Toru Maniwa, Yasuyuki Oishi, Takeshi Takano
Publikováno v:
Microwave and Optical Technology Letters. 45:551-554
With regard to wideband predistortion type power amplifiers, such as shared amplifiers used in W-CDMA base stations, the memory effects associated with RF power amplifiers degrade power efficiency. Aiming to solve this problem, we find that a high-vo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::07da3931eb87ea9eb8409433f1a57b86
https://doi.org/10.1002/mop.20876
https://doi.org/10.1002/mop.20876