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Search results for: frequency
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Year: 2010, Volume: 10, Issue: 1
... ωn1 is A realistic approach consists in considering that the greater then ωn. signals u1k and uk are distinct, representing the input and The width of the range frequency domain [ωn1, ωn], in output respectively of the rolls positioning servo-system, which is provided with a predictive control for the dynamics which the inverse ...
Year: 2010, Volume: 10, Issue: 1
... of the rotor flux is obtained using a flux observer, speeds. Different types of membership functions of the linguistic variables and output/input characteristics are but the frequency of the rotor field is neither computed nor analyzed. A simple but robust structure enables a wide range estimated but it is imposed depending on the load torque ...
Year: 2010, Volume: 10, Issue: 1
... then used in the distance determination formula. The tests were made in a 3 meters semi-anechoic chamber- in order the results not to be affected by other radio frequency emissions from the surrounding environment- using a 20 Hz- 26.5 GHz EMI Test Receiver, a log-periodic antenna and RF Figure 1. Experimental test setup for ...
Year: 2010, Volume: 10, Issue: 1
... is the sampling will take place at time instants that frequency characteristic. Their construction is based on a novel ... the ISI, when the impulse response is medium-frequency to high-frequency area in order to get a sampled at the ... site with a time offset, as a result of more open eye in the eye diagram and slower rising ...
Year: 2009, Volume: 9, Issue: 3
... uses 52 communication environments. The core technology of physical layer in ADSRC is orthogonal frequency division multiplexing subcarriers which are modulated by using binary or (OFDM), ... Timing- synchronization analysis for IEEE 802.11a wireless LANs in performance in high-mobility environment. frequency-nonselective Rician fading environments", IEEE transactions on Wirelss Communications, vol. 3 ...
546. Basic Consideration for Signal Processing Solutions Used in Sigma-delta Based ADC and DAC Converters
Year: 2010, Volume: 10, Issue: 1
... Chip came up). This paper presents R ADC exactly such an example in which the audio section of a mobile T phone must coexist with the intermediate radio frequency DAC section in a single IC. It starts by mentioning the technical challenges facing this request, followed by an introduction of the fundamental theories used in finding ...
Year: 2009, Volume: 9, Issue: 3
... varactors Control Oscillator (QVCO) with minimum power consumption capacitance, the tuning range of LC VCOs is very narrow, is developed to meet the phase noise and frequency band especially in low frequency bands. However, many studies requirements of RFID, Zigbee and Bluetooth standards. To explore the tuning range of LC VCO but ...
Year: 2010, Volume: 10, Issue: 1
... L1 D3 current. The selection of inductor value is based on Duty 400V DC R2 D5 C8 cycle (D ), input voltage (Vin), switching frequency (fs) and C2 R1 0 – 160V DC C4 C1 change in current( I). The inductance is given by, Q2 D2 C7 Vin ...
Year: 2009, Volume: 9, Issue: 3
... - Transmission time for the protocol overheads, H= 78 802.11b, because both standards use the same radio bytes, transmitted at the channel data rate R; frequency, the protection mechanism, based on RTS/CTS- Transmission time for the security overheads, HWEP/WPA= handshaking, is employed. When a ...
Year: 2009, Volume: 9, Issue: 3
... . For resolution and is well suited for determining the frequency feature extraction module, we have used a suitable ... The output of any coefficients, and short-term transients or high-frequency activity (such as spikes) will be contained ... the detail neuron at the output layer of RBF network is calculated as coefficients. If we reconstruct the signal ...
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