Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Vesa Lehtinen"'
Autor:
Frank Schaich, AlaaEddin Loulou, Toni Levanen, Mikko Valkama, Juha Yli-Kaakinen, Markku Renfors, Thorsten Wild, Vesa Lehtinen
Publikováno v:
ISWCS
In cyclic-prefix orthogonal frequency-division multiplexing (CP-OFDM) based radio access systems, the coexistence of different technologies without proper time-frequency synchronization is limited due to high out-of-band emissions. Therefore, filtere
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7f4d7de6a93e00a37e757b377f7b6a97
https://trepo.tuni.fi/handle/10024/129545
https://trepo.tuni.fi/handle/10024/129545
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 63:3608-3623
Carrier aggregation transmissions in frequency division duplexing devices reduce the duplexing distance between the transmitter (TX) and receiver (RX) bands. As a consequence, the spurious intermodulation distortion products created by the nonlinear
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1ee71f34768ff7f83a3b7d9df00cb7b9
https://doi.org/10.1109/tmtt.2015.2478005
https://doi.org/10.1109/tmtt.2015.2478005
Publikováno v:
IEEE Transactions on Circuits and Systems I: Regular Papers. 62:590-599
This paper proposes a reconfigurable decimator architecture for a multi-standard receiver front-end. This architecture is based on direct radio-frequency bandpass sampling and analog discrete-time multirate signal processing. The overall front-end co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a0ba11e36cefbf1d2ff382919e8b8691
https://doi.org/10.1109/tcsi.2014.2363514
https://doi.org/10.1109/tcsi.2014.2363514
In order to provide higher data rates and to improve radio spectrum utilization, 3GPP has introduced the concept of carrier aggregation (CA) in its Release 10 and onwards, commonly known as LTE-Advanced standard. The CA technology, in particular when
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4bf000376e7434faefe6d830aa4a298b
https://trepo.tuni.fi/handle/10024/125972
https://trepo.tuni.fi/handle/10024/125972
Publikováno v:
RWS
In radio frequency (RF) power amplifiers (PA), power efficiency, linearity and cost are contradictory requirements. In the Long Term Evolution (LTE) and LTE-Advanced (LTE-A) standards by the Third Generation Partnership Project, maximum power reducti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b5d101c4a93073ee509f341ff4c809ab
https://doi.org/10.1109/rws.2013.6486671
https://doi.org/10.1109/rws.2013.6486671
Publikováno v:
WCNC Workshops
This article addresses some implementation challenges in the potentially very energy-efficient charge sampling radios. Alternative ways to implement charge sampler in charge sampling radio are considered, and the impacts and spectral shape characteri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ead6b849ff64ebb33f50b42fecb4403c
https://trepo.tuni.fi/handle/10024/128650
https://trepo.tuni.fi/handle/10024/128650
Publikováno v:
Scopus-Elsevier
Tampere University
Tampere University
In this paper, the impulse response symmetry of Farrow interpolation filters and its significance in rational sample rate conversion is addressed. Four methods for ensuring impulse response symmetry are proposed. Comparison of different symmetrizatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::59bcf61140af7932c180c28c3fdb21e6
https://doi.org/10.1109/isccsp.2004.1296505
https://doi.org/10.1109/isccsp.2004.1296505
Publikováno v:
Proceedings of the 7th Nordic Signal Processing Symposium - NORSIG 2006; 2006, p78-81, 4p
Publikováno v:
Tampere University
Scopus-Elsevier
Scopus-Elsevier
Publication in the conference proceedings of EUSIPCO, Lisbon, Portugal, 2014
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7e6238207fb3b268d76f18043cb86dbc
https://researchportal.tuni.fi/en/publications/34b2c021-97fb-41cf-954b-2ccb27603447
https://researchportal.tuni.fi/en/publications/34b2c021-97fb-41cf-954b-2ccb27603447
Autor:
Markku Renfors, Vesa Lehtinen
Publikováno v:
Tampere University
ISSPA
ISSPA
The cascaded integrator-comb (CIC) filter is an efficient multiplier- free structure for decimation and interpolation. However, due to its narrow stopband notches, it is useful only when the signal of interest has a small bandwidth compared to the in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3cd3e12d917d6fd09ac9d2831be232b5
https://researchportal.tuni.fi/en/publications/09553f21-46fb-4b43-ad19-717bd27b822a
https://researchportal.tuni.fi/en/publications/09553f21-46fb-4b43-ad19-717bd27b822a