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 the methodology uses in preparing a conversation speech corpus for acoustic model training of Malay automatic speech recognition (ASR) in telco call center. Data preparation is significant and should be done properly in order to build robust model for an ASR system. We described the issues during filtering process and the list of sensitive data to be removed to avoid any personal...
This paper present the design of 2-stage 15 GHz power amplifier (PA) using 0.15 μm GaAs p-HEMT technology. At operating frequency of 15 GHz (Ku-band), each single PA stage was designed for optimum power and efficiency of the transistor, with 50 Ω input and output impedance matching. In this design, the active devices were selected from the depletion p-HEMT type with voltage supply of 4.5 V and DC...
This paper present the design of 3-stage 15 GHz power amplifier (PA) using 0.15 μm GaAs p-HEMT technology. At operating frequency of 15 GHz (Ku-band), each single PA stage was designed for optimum power and efficiency of the transistor, with 50 Ω input and output impedance matching. In this design, the active devices were selected from the depletion p-HEMT type with voltage supply...
The paper presents the design of Interdigital Band Pass Filter (IBPF) for WLAN applications at center frequency 2.45GHz. It was designed using a 3D EM simulation tool and fabricated on substrate Ferro A6S by using in-house process of Low Temperature Co-fired Ceramic (LTCC) technology. Simulated and measured results were presented. The pass band insertion loss of the filter was measured to be -1.66dB...
This paper presents a CMOS fully differential folded cascode that operates at high frequency. Theoretical study on this amplifier is first presented and analyzed. The crucial parameters that may have influences on the trade-off for the design of this amplifier are also presented. Simulation results showing the characteristics of this amplifier are discussed. Using technology CMOS 0.18 μm with power...
The paper presents the structure for an oxide confined vertical cavity surfaceemitting laser (VCSEL) and the simulation results for its operation at 850 nm of the electromagnetic spectrum. In this kind of VCSEL, low-doped DBR layers as well as the barrier reduction layers within the DBRs are introduced, and it is found that the device finally yields good operational efficiency. Illustrations are made...
Third order intermodulation (IM3) can cause non-linearity effects which result in interference and crosstalk between the subcarriers in radio over fibre (ROF) transmissions. This paper presents the experimental results of the effect of varying the magnitude of the laser bias current on the IM3 in an ROF system with direct modulation. We also investigate the behaviour of the system spurious free dynamic...
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.