Topic
Bandwidth (signal processing)
About: Bandwidth (signal processing) is a research topic. Over the lifetime, 48550 publications have been published within this topic receiving 600741 citations. The topic is also known as: Bandwidth (signal processing) & bandwidth.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this article, a new type of varactor-tuned dual-mode bandpass filter is presented, where the odd and even modes do not couple to each other, and the tuning of the passband frequency becomes simple with a single dc-bias circuit while keeping nearly constant absolute bandwidth.
Abstract: This paper presents a new type of varactor-tuned dual-mode bandpass filter. Since the two operating modes (i.e., the odd and even modes) in a dual-mode microstrip open-loop resonator do not couple to each other, the tuning of the passband frequency becomes simple with a single dc-bias circuit while keeping nearly constant absolute bandwidth. Design equations and procedures are derived, and two two-pole tunable bandpass filters of this type are demonstrated experimentally.
126 citations
TL;DR: A comparative investigation on various channel estimation algorithms for OFDM system in the mobile communication environment is presented and analyzed in terms of computational complexity, mean square error, and bit error rate and Wiener filter estimation shows the best error performance.
Abstract: A comparative investigation on various channel estimation algorithms for OFDM system in the mobile communication environment is presented and analyzed in terms of computational complexity, mean square error, and bit error rate in this paper. As a result, Wiener filter estimation shows the best error performance. Concerning the computational complexity as well as the performance, however, the piecewise linear estimator is considered as a proper choice when the reference signal spacing is relatively narrow. And the cubic-spline estimator is a good alternative to the Wiener filter estimation if the reference signal spacing is wider than the coherent bandwidth of transmission channel.
126 citations
TL;DR: In this paper, a time-interleaved ADC architecture that eliminates the need to correct timing offsets and is yet scalable to high sampling rates is presented, where a Nyquist rate sampling switch is used to eliminate timing skews, which is followed by subsampled, double-sampled, interleaved sample-and-hold (S/H) stages.
Abstract: A time-interleaved ADC architecture that eliminates the need to correct timing offsets and is yet scalable to high sampling rates is presented. To eliminate timing skews, a Nyquist rate sampling switch is used, which is followed by subsampled, double-sampled time-interleaved sample-and-hold (S/H) stages. This circuit is configured with a special clocking scheme that reduces the loading of the interleaved S/Hs on the Nyquist rate sampling switch, making this scalable to high sampling rates. The subsampled ADCs (sub-ADCs) in this design use a 3.5-bit/stage pipelined architecture. This 1-GS/s 11-bit ADC achieves 55-dB peak SNDR, 58.6-dB SNR, consumes 250-mW core power, and occupies a core area of 3.5 mm2. This circuit is implemented in a dual-gate 1.2 V/2.5 V, 0.13-mum logic CMOS process
126 citations
TL;DR: The results suggest that gain peaking is a generally applicable tool for increasing detector bandwidth in practical photonics systems without requiring the difficult process of lowering detector capacitance.
Abstract: Germanium-on-silicon photodetectors have been heavily investigated in recent years as a key component of CMOS-compatible integrated photonics platforms. It has previously been shown that detector bandwidths could theoretically be greatly increased with the incorporation of a carefully chosen inductor and capacitor in the photodetector circuit. Here, we show the experimental results of such a circuit that doubles the detector 3dB bandwidth to 60 GHz. These results suggest that gain peaking is a generally applicable tool for increasing detector bandwidth in practical photonics systems without requiring the difficult process of lowering detector capacitance.
126 citations
TL;DR: In this article, the optimal bandwidth for estimating ratio of density-weighted average derivatives is derived by minimizing the leading terms of mean squared error of the density weighted average, and a simple plug-in estimator is proposed.
126 citations