The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper presents new results on critical band masked distortion controlled quantisation of a linear transform representation of speech. In particular, fixed rate split vector quantisation of a critical band gain vector is investigated. While shown to be objectively significant in meeting masked distortion criteria, near-transparent quantisation of the critical band gain spectrum is nonetheless...
Delta operator realizations have been found to be robust against roundoff errors when high sampling rate relative to signal bandwidth is used. In this paper zero input limit cycles in the transposed direct form delta operator structure are studied. It is shown that the limit cycles of the basic delta structure are much lower in amplitude than those of the direct form delay structure for narrowband...
this paper proposes a directional noise suppressor with a specified constant beamwidth. A directional gain is calculated based on interchannel phase difference and combined with a spectral gain commonly used in single-channelnoise suppressors (NSs). The beamwidth can be specified as passband edges of the directional gain. In order to implement frequency-independent constant beamwidth, frequency-proportionate...
This paper focuses on the problem of single-channel noise reduction in a transient noise environment for speech enhancement application. A typical speech enhancement algorithm requires an estimate of the noise statistics. However, the problem of noise estimation is challenging when the statistics of the noise vary significantly with time. By exploiting the fact that for speech signal most of the energy...
Recently, the ideal binary mask has been introduced in the modulation domain by extending the ideal channel selection method to modulation channel selection [1]. This new method shows substantial improvement in speech intelligibility but less than its predecessor despite the higher complexity. Here, we extend the previous finding from [1] and provide a more direct comparison of binary masking in the...
This paper presents a new data-aided timing recovery algorithm for channels with data-dependent noise. Based on a data-dependent Gauss-Markov model of the noise, a maximum-likelihood timing recovery scheme is derived. The proposed timing recovery algorithm incorporates data-dependent noise prediction parameters in the form of linear prediction filters and prediction error variances. Moreover, because...
In this paper, a multi-level force-feedback analog sensing circuits with delta-sigma modulator for CMOS micro-accelerometers is newly designed. The proposed circuits are attractive due to that the multi-level force-feedback circuits are proposed to null the sensor and all the analog and digital block circuits for CMOS micro-accelerometers are robust and compact to be integrated. Based upon the device...
In this paper, a CMOS digitized gas transducer with noise insensitivity for environmental monitoring of CO2 concentration is newly proposed. Based upon the device parameters of 0.35 µm 2P4M CMOS technology with 3.0 V power supply, all the functions and performance of the proposed digitized gas transducer are successfully tested and proven through MATLAB in the behavior simulations and SPICE simulations...
This paper describes an improved complementary beam-forming microphone array with a new noise adaptation algorithm for efficient speech enhancement. Complementary beamforming is based on two types of beam-formers designed to obtain complementary directivity patterns each other. In this system, two directivity patterns of the beamformers are adapted to the noise directions so that the expectation values...
The transfer functions of all polynomial predictors are derived. Previously proposed IIR polynomial predictive filters based on the feedback extension of FIR predictors are shown to be a special case of this general class.
To avoid an increased noise response under high-gain learning, a Q-filter with varying cut-off frequency is proposed. The Q-filter design is of particular interest in the wafer scanning industry where nano-position accuracy should be achieved under high-speed repetitive motion. In a lifted iterative learning control (ILC) setting, the nonlinear Q-filter is given state-dependent low-pass filter characteristics...
This paper presents the design of A S-band low noise amplifier (LNA), which is made up of two stages with Agilent's ATF-54143. The biasing circuit, input stage, middle stage and output stage matching circuits of the LNA are designed and simulated by the software Agilent ADS. At last, the designed circuit is fabricated and measured. It is showed that, from 2.15GHz to 2.65GHz, the gain is between 27...
A double active gm-boosted-based inductorless differential wideband low-noise amplifier (LNA) is proposed in this paper. The proposed LNA applies two common-gate (CG) stages and the capacitive cross-coupled (CCC) technique. Moreover, a noise-cancelling architecture is adopted for low noise factor (NF). The proposed LNA is simulated in a TSMC 0.18-µm RF CMOS process.Within DC-1.2GHz, the LNA achieves...
A 0.1–6 GHz fully differential common gate low noise amplifier (CGLNA) is proposed in this paper. High equivalent transconductance (gm) is realized with active transconductance-boosting with cross coupling capacitance. By introducing a positive feedback path in active transconductance-boosting circuit, this circuit increases freedom of transconductance, thus alleviates the trade-off between input...
It has been shown that high-frequency (HF) band power line communication (PLC), that is, the HomePlug 1.0 specification, is feasible for a low-voltage direct current (LVDC) smart grid (SG) system, where power electronics and low-voltage DC are applied to the electricity distribution. In this paper, the applicability of the latest HomePlug specification, Green PHY (GP), is studied within the LVDC PLC...
Conventional CMOS technology provides a lot of opportunities in the field of electronics device. But presently, carbon nanotube field effect transistor (CNTFET) is a new technology for the application in the field of electronic device. Due to the limitation of the size of CMOS, CNTFETs are the promising substitute due to its nano scale size. CNTFET also shows the high stability, low power circuit...
Differential input differential output low noise amplifier working at 2.4GHz is designed using TSMC 180nm CMOS RF process. Design methodology of LNA is analyzed in detail. Cascode topology with inductively degenerated common-source CMOS LNA is suggested with improved gain, linearity, stability and improved isolation. The optimum matching network is designed to minimize the noise figure (NF) and maximize...
Local field potential (LFP) has been of growing interest in interpreting specific motor activities and higherlevel cognitive functions for neurophysiological investigation. LFP denote the neural activity recorded from the ensemble of neurons which carry information in the frequency range of 1–200 Hz. The requirements on the electronics of an amplifier sensor used to measure LFP signals is very stringent,...
A two stage 3.2–6.3 GHz Ultra Wide-Band CMOS Low Noise Amplifier with out-band rejection topology by using modified low noise Active Inductor with 0.18μm CMOS technology is presented in this paper. Due to the Federal communication commission's power limitation on the transmitting signal at transmitter, the receiver signal power of the UWB system is very smaller than interferer narrow-band signals...
A fully integrated receiver front-end for very small aperture terminal (VSAT) applications in a 0.18-μm SiGe BiCMOS technology is demonstrated. To satisfy different specifications of various applications, the proposed receiver can down-convert the input signal in a wide RF range from 9.8 to 14.8 GHz to the IF frequency at L-band (950-2150MHz) with four differences LO frequencies. The noise figure...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.