Results 261 to 270 of about 241,566 (298)
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Multisine Calibration for Large-Signal Broadband Measurements
IEEE Transactions on Instrumentation and Measurement, 2008Classical calibration techniques use single-sine-wave measurements to maximize the signal-to-noise ratio (SNR). In large-signal characterization, the large number of instrument states to be calibrated results in unacceptably long calibration times. The proposed approach uses multisine excitation signals during the calibration to reduce the calibration ...
Van Moer, Wendy, Rolain, Yves
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Ideal amplification of broadband signals
International Journal of Microwave and Wireless Technologies, 2013This paper describes a digital signal processing (DSP) method for achieving “ideal” amplification, maximizing both the average output signal power and power-added-efficiency for any signal waveform and any power amplifier (PA) transfer characteristic. Detailed algorithms are described for optimally accomplishing peak reduction (PR), predistortion (PD ...
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Electrical funnel: A broadband signal combining method
2006 IEEE International Solid State Circuits Conference - Digest of Technical Papers, 2006A non-uniform 2D propagation medium is compatible with modern IC processes and is used to produce a 4-to-1 broadband power combiner called an electrical funnel. The combiner is used in a wideband power amplifier in a 0.13mum SiGe BiCMOS process and yields 125mW peak output power at 85GHz with a 24GHz 3dB ...
Ehsan Afshari +3 more
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Temporal weighting in loudness of broadband and narrowband signals
The Journal of the Acoustical Society of America, 2009Temporal weights used by listeners when judging the overall loudness of a stimulus were measured for a 1-s-long noise centered around 2kHz, whose level was randomly perturbed every 100ms. The bandwidth was either 6400Hz (broadband condition) or 400Hz (narrowband condition).
Jan, Rennies, Jesko L, Verhey
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On the detection of random broadband signals
International Symposium on Electromagnetic Compatibility - EMC EUROPE, 2012One of the most critical problems in immunity testing is to detect the malfunctions of the equipment under test (EUT) when the susceptibility signals are injected into it. In most EMC specifications it is left to the test operator to decide whether the EUT is susceptible on the basis of examination of qualitative output parameters; even if quantitative
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Signal detection in non-stationary broadband noise
[Proceedings] ICASSP 91: 1991 International Conference on Acoustics, Speech, and Signal Processing, 1991An algorithm for signal detection across a wide band of frequencies in which the noise statistics may be considered stationary only over very short intervals is proposed. The algorithm estimates the noise level in each channel of a channelized receiver, based on the levels in the quietest channels, after compensating for time-varying passband ripple ...
Bart F. Rice, Charles Tadjeran
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Improving Detection of Short Broadband Probe Signals
IFAC Proceedings Volumes, 2012In various control systems, linear frequency modulated broadband signals (LFM or chirp signals) are often applied as a probe. Their recognition depends on their compression based on the matched filtering. This work presents the solutions to essentially improving the detection of the short chirp signals.
Wlodzimierz Pogribny +2 more
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Evaluation of Broadband UNI Signaling Protocol Techniques
Journal of High Speed Networks, 1993This paper compares several distinct approaches for providing user-network signaling in a Broadband Integrated Services Digital Network (B-ISDN). The protocols are examined against B-ISDN functional objectives and performance considerations. In addition, they are compared in terms of the ease of introducing new services, common UNI/NNI signaling ...
Thomas F. La Porta +1 more
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Electrocardiographic Signal Broadband Properties
Computing in Cardiology Conference (CinC)Background: Low, high, and ultra-high-frequency ECGs measure ventricular activation differently. However, their principles and properties have not yet been studied systematically. Method: 5 kHz ECG resting recordings were acquired in 134 subjects. We used an extended 12-lead ECG setup with 6 (V1-V6)+6 extended precordial leads. We measured the distance
Jurak, Pavel +11 more
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Signalling on the broadband subscriber access
IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond, 2003The access signaling infrastructure for a B-ISDN (broadband integrated services digital network) which is based on asynchronous transfer mode (ATM) is considered. A current proposal involves replacing the common signaling-channel approach, as in a narrowband ISDN, by separate dedicated signaling channels per terminal on the subscriber access line in a ...
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