Zobrazeno 1 - 10
of 20
pro vyhledávání: '"Omer Tanovic"'
Autor:
Alexandre Megretski, Omer Tanovic
Publikováno v:
MIT web domain
In this paper, we consider a problem of designing discrete-time systems which are optimal in frequency-weighted least squares sense subject to a maximal output amplitude constraint. It can be shown for such problems, in general, that the optimality c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f80af2101efd172b33ebc8043d594ccf
https://doi.org/10.1016/j.ifacol.2018.11.007
https://doi.org/10.1016/j.ifacol.2018.11.007
Publikováno v:
GLOBECOM
In this paper, we propose a power encoding method for converting a high-resolution OFDM baseband signal into a signal that assumes only a finite number of values. This is achieved by the series interconnection of, optimally (co)designed, delta- sigma
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::058fc1b13bcb22a8b4a68781ba2915bb
https://doi.org/10.1109/globecom38437.2019.9014289
https://doi.org/10.1109/globecom38437.2019.9014289
Autor:
Omer Tanovic, Alexandre Megretski
Publikováno v:
ECC
In this paper, we consider a problem of designing discrete-time systems which are optimal in frequency-weighted least squares sense subject to a maximal output amplitude constraint. In such problems, the optimality conditions do not provide an explic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ea192397931aad4700c97a1402ed623e
https://doi.org/10.23919/ecc.2019.8796298
https://doi.org/10.23919/ecc.2019.8796298
Publikováno v:
ISCAS
Radio frequency pulse-width modulation (RF-PWM) has been used as a power coding method in all-digital transmitters, which employ highly efficient switched-mode power amplifiers (SMPA). The main drawback of RF-PWM is the high level of in-band harmonic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2b2803105ce0e0b6941558d0e39164a0
https://doi.org/10.1109/iscas.2018.8351725
https://doi.org/10.1109/iscas.2018.8351725
Autor:
Rui Ma, Omer Tanovic
Publikováno v:
RWS
This paper presents a novel method for multilevel power coding and upconversion to RF frequency, by the means of a digital radio-frequency pulse width modulation (RF-PWM). Delta-sigma modulation (ΔΣM) and memoryless predistortion are used to mitiga
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d812b1dd78d93d4b0b2c180b48555dae
https://doi.org/10.1109/rws.2018.8304948
https://doi.org/10.1109/rws.2018.8304948
Publikováno v:
MIT web domain
We consider equivalent baseband representation of transmission circuits in the form of a nonlinear dynamical system $\mathbf S$ in discrete time (DT) defined by a series interconnection of a phase-amplitude modulator, a nonlinear dynamical system $\m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8f1424fa358ad1b47ee6584a519e6282
https://hdl.handle.net/1721.1/136348
https://hdl.handle.net/1721.1/136348
Publikováno v:
2017 IEEE Asia Pacific Microwave Conference (APMC).
Pulse-width modulation (PWM) has recently become very popular power encoding method in all-digital transmitter (ADT) architectures, which employ switch-mode power amplifiers (SMPA) for high power efficiency. Main drawback of PWM is high level of in-b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6bba43ff7f962394d6a7b273dfb9e684
https://doi.org/10.1109/apmc.2017.8251579
https://doi.org/10.1109/apmc.2017.8251579
Publikováno v:
2017 47th European Microwave Conference (EuMC).
In recent years, carrier based pulse-width modulation (PWM) has been extensively used for reducing input signal resolution in all-digital transmitters, and is known to provide better coding efficiency than other power encoding methods, e.g. delta-sig
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::52cffc638dccd0a3b1598f79c86400da
https://doi.org/10.23919/eumc.2017.8230951
https://doi.org/10.23919/eumc.2017.8230951
Publikováno v:
MWSCAS
Pulse-width modulation (PWM) has been extensively used in switched converter systems, and recently in RF applications, due to an increased interest in all-digital transmitters. These architectures employ high efficiency switched-mode power amplifiers
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d0df6420a953af60e1e6e8cf5d99ee19
https://doi.org/10.1109/mwscas.2017.8053131
https://doi.org/10.1109/mwscas.2017.8053131
Publikováno v:
RWS
In this paper an exact baseband equivalent model of a quadrature modulated all-digital transmitter is derived. No restrictions on the number of levels of a digital switched-mode power amplifier (SMPA) driving input, nor the pulse encoding scheme empl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::58acf9b311d9dc855f4a429986b79c47
https://doi.org/10.1109/rws.2017.7885990
https://doi.org/10.1109/rws.2017.7885990