378 results found.
Year: 2011, Volume: 11, Number: 1
... =[ n1(t) .. nm(t )] T is the noise vector and H is an m n unknown mixing matrix, intended to model ... yi) combinations of the n unknown source signals. If the observed signals are noise-contaminated, we have: where qi(yi) is the probability distribution. ...
Terms matched: 2 - Score: 8 - 807k
Year: 2011, Volume: 11, Number: 1
... (CT), where the because it allows early breast cancer detection using image of the internal structures of a body is represented slice microwave imaging. The thermal noise power measured by by slice. Today, the application of active microwave the radiometer is related to the local temperature distribution imaging methods to visualize the interior of ...
Terms matched: 1 - Score: 6 - 654k
Year: 2011, Volume: 11, Number: 1
... , j (4) i =1 Figure 1. Transmitter block scheme The noise samples, zt, j, are modeled as independent realizations of a complex ... random variable with variance N 0 2 for each dimension. The signal-to-noise ratio (SNR) is defined as E N 0. E is the transmitted energy for ...
Terms matched: 2 - Score: 15 - 621k
Year: 2011, Volume: 11, Number: 1
... , unlike DUT. Figure 8. Measurement bench As the level of the third harmonic component is close to been reported in [9]. or under the noise floor [8 ], only the second harmonic will The measurements results will be presented in Section 4, be considered for the parameter identification in Section IV ...
Terms matched: 1 - Score: 6 - 940k
Year: 2011, Volume: 11, Number: 1
... or at a defined complex trajectory with satisfactory (x) and velocity (v). The position of each particle is a dynamic performance and good load and noise disturbance candidate solution, each particle remembers its personal best rejection. The IM is a very robust machine but it is not position. The flock as whole ...
Terms matched: 1 - Score: 10 - 758k
Year: 2011, Volume: 11, Number: 1
... which can be directed to the desired coverage areas and minimize the impact of unwanted noise and Figure 1. Geometry and global coordinate system of D ‚ E interference ... output with 4 elements spaced at a half wavelength apart. € 9, interference-plus-noise power while maintaining a € 0.01/ 3m, L € / ...
Terms matched: 2 - Score: 21 - 559k
Year: 2011, Volume: 11, Number: 1
... 4G systems such as randomness in traffic and channel propagation models. In LTE-Advanced [6-7]. At its core, 802.16m uses time-tested these networks the signal to noise ratio of received signal technologies such as Orthogonal Frequency Division changes dynamically, which in turn switches to more or less Multiplexing (OFDM), Orthogonal Frequency Division ...
Terms matched: 1 - Score: 7 - 781k
Year: 2010, Volume: 10, Issue: 4
... be applied. However, with the purpose of verification, there was implemented a circuit of measurement through integration. The practical realization confirmed the simulation; the accumulated noise did not allow the accurate measurement of the concentration of Radon. Fig. 2 Model of the measurement through integration B. Simulation in SIMULINK of the measurement ...
Terms matched: 1 - Score: 38 - 835k
Year: 2010, Volume: 10, Issue: 4
... cross- Control of the director magnetic field in ion trap of section and the number of turns. The sensitivity and the the maser for atomic clock signal/noise ratio depend on the quantity of material- Magnetic field control at the MAT 252 Finnigan (copper) the coil is made of, and the conductor diameter ...
Terms matched: 1 - Score: 9 - 9,652k
Year: 2010, Volume: 10, Issue: 4
... the various advantages, LSRMs has some V velocity (m /s) drawbacks such as high force ripple, vibration, acoustic Fmax maximum force (N) noise and need of power electronic converters. Several Fmin minimum force (N) efforts to reduce or eliminate the torque ripple of the rotary Favg average force ( ...
Terms matched: 1 - Score: 16 - 1,979k