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
07 Oct 2001
TL;DR: In this article, the design and performance issues associated with stacked crystal filters using bulk wave thin films with aluminum nitride as the piezoelectric are described, in addition to GPS filters operating at frequencies up to 8.5 GHz.
Abstract: Stacked Crystal Filters, (SCF), are composed of multi-layers of piezoelectric and metal layers. Normally these filters have a complex frequency spectrum containing near-in spurious responses. However, by having the SCF formed in a Solidly Mounted Resonator (SMR) format, the performance of the device is greatly improved by the finite bandwidth of the SMR reflector. The conventional SCF also has a bandwidth that is too small for some wireless applications. This paper will describe the design and performance issues associated with stacked crystal filters using bulk wave thin films with aluminum nitride as the piezoelectric. Filters without spurious responses, filters having wide bandwidths, and filters operating at frequencies up to 8.5 GHz will be described in addition to GPS filters.
110 citations
TL;DR: In this article, the relationship between the control bandwidth and the load transient response in voltage regulator modules (VRMs), which are designed with multiphase interleaving synchronous buck converters, is investigated.
Abstract: This paper investigates the relationship between the control bandwidth and the load transient response in voltage regulator modules (VRMs), which are designed with multiphase interleaving synchronous buck converters. Both voltage- and current-mode controls are discussed. A critical bandwidth value is discovered, beyond which pushing the bandwidth can no longer reduce the output voltage spike during the load transient response. Also, the critical bandwidths are different according to different kinds of output capacitors. The critical bandwidth concept highlights the trend of high-frequency VRM design that uses ceramic capacitors to achieve smaller size and faster load transient response. Simulation and experimental results prove the theoretical analysis.
110 citations
Patent•
21 Mar 1997
TL;DR: An apparatus for sourcing an interrogation signal for use in an object identification system including a frequency hopping source (100) for generation of an interrogation transmission by a bi-directional antenna (12) to a tag Upon receipt, the tag provides a return signal that is backscatter modulated to include tag identification or other data which is processed by the sourcing system (50) as mentioned in this paper.
Abstract: An apparatus (50) for sourcing an interrogation signal for use in an object identification system including a frequency hopping source (100) for generation of an interrogation transmission by a bi-directional antenna (12) to a tag Upon receipt, the tag provides a return signal that is backscatter modulated to include tag identification or other data which is processed by the sourcing system (50) The frequency hopping source (100) includes a voltage controller oscillator (206) which is driven by a pseudo random code generator (200) for selecting one of a plurality of hopping frequencies at which the interrogation signal is to be generated based on the available bandwidth
110 citations
TL;DR: Some numerical results are shown to highlight the effectiveness of the new technique to devise high-performance radar waveforms complying with the spectral compatibility requirements.
Abstract: Radar signal design in spectrally dense environments is a very challenging and topical problem. This letter deals with the synthesis of waveforms optimizing radar performance while satisfying multiple spectral compatibility constraints. Unlike some counterparts available in the open literature, a specific control on the interference energy radiated on each shared bandwidth is enforced. To tackle the resulting NP-hard optimization problem, a polynomial computational complexity procedure based on semidefinite relaxation (SDR) and randomization is developed. Hence, some numerical results are shown to highlight the effectiveness of the new technique to devise high-performance radar waveforms complying with the spectral compatibility requirements.
110 citations
TL;DR: An external electro-optic technique for characterising high-speed electrical signals in two-dimensional electrode structures of devices and integrated circuits fabricated on any substrate material has been described in this article.
Abstract: We describe an external electro-optic technique for characterising high-speed electrical signals in two-dimensional electrode structures of devices and integrated circuits fabricated on any substrate material A temporal resolution of less than 300 fs, corresponding to a bandwidth in excess of 1 THz has been achieved
110 citations