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An Augmented Refrigerator with the Awareness of Wasteful Electricity Usage
Fujinami, Kaori,Kagatsume, Shota,Murata, Satoshi,Alasalmi, Tuomo,Suutala, Jaakko,Roning, Juha The Institute of Internet 2014 International Journal of Internet, Broadcasting an Vol.6 No.1
In this paper, an augmented refrigerator is proposed that presents information to increase the awareness of electric power consumption of a household fridge. The key idea is to reflect wasteful behavior on the feedback to a user, rather than mere amount of consumption or duration of opening a door of a fridge.
Poly-Harmonic Modeling and Predistortion Linearization for Software-Defined Radio Upconverters
Xi Yang,Chaillot, D,Roblin, P,Wan-Rone Liou,Jongsoo Lee,Hyo-Dal Park,Strahler, J,Ismail, M IEEE 2010 IEEE transactions on microwave theory and techniqu Vol.58 No.8
<P>This paper presents a new predistortion linearization scheme for single-sideband mixers to be used for removing unwanted harmonics and intermodulation products of the digital IF in an heterodyne transmitter. The proposed algorithm, called poly-harmonic predistortion linearization, relies on an orthogonal expansion in the frequency domain of the nonlinearities for the mixer modeling. It takes into account memory effects that are piece-wise quasi-memoryless and enables the independent cancellation of unwanted spurious sidebands of the digital IF harmonics. The poly-harmonic predistortion linearization scheme for the weak-nonlinear regime was implemented in a field-programmable gate array and experimentally investigated for the linearization of a four-path polyphase single-sideband upconverter. The ability of the poly-harmonic predistortion algorithm to linearize the four-path polyphase mixer for input signals with high envelope fluctuation is demonstrated. -70-dBc/-62-dBc/-60-dBc spurious rejection and 18-dB/10-dB/8-dB linearization improvement of the third-order distortions are achieved for a two-tone RF signal, a 64-tone 10-MHz bandwidth multisine signal and orthogonal frequency-division multiplexing signal, respectively. The combination of the polyphase multipath technique and the poly-harmonic predistortion linearization technique offers an attractive filterless approach for the development of multimode broadband software-defined radio.</P>