In accordance with the structural characteristics of the CDMA reverse power control command frame,a CDA reverse-link predictive power control algorithm has been proposed to predict the fading to be experienced in the next received signal and then form a power control command to compensate the expected fading effect in advance.
Simulation results show that ,in comparison with other power control schemes,the predictive power control scheme can be used to efficiently reduce the variance of received power at the base station thereby improving the capacity of CDMA system.
The multi-rate data transmission was achieved by adaptive rate transmission in the system designed. The reliability of high-speed communication and dynamic power allocation in sub-channels were assured by predictive power control algorithm, in which the highest transmission efficiency was acquired.
With this model,we can carry on with the computer aideddesign of the transistors,predict the safe operating area of the power transistors,and direct the reliability design of the devices.
Under the quickly declining channel situation of a fast-moving mobile platform,the backward closed loop algorithm controlled by power can bring relatively great deviation.
Multiple linear regression analysis was performed to derive QSAR models, which were further evaluated for statistical significance and predictive power by internal and external validation.
The cross-validation method was used to evaluate the predictive power of the generated network.
Its average predictive power is shown to be approximately 97%.
Computer analysis of this series of compounds was carried out and a mathematical model of the dependence of their activities on the structure of their substituents was obtained with a high correlation coefficient and a satisfactory predictive power.
A previously proposed equation of segregation kinetics is refined, and its predictive power is analyzed.
A model called two-dimensional non-isothermal distributed transistor direct current model for bipolar transistors is proposed.In this model,the high injection effect in thebase,the kirk effect,and the current crowding effect caused by the in-base resistanceand the emitter metallized sheet resistance are considered.The fact that the three-dimen-sional non-uniform temperature distribution will influence the effects mentioned aboveis also considered.Using a computer,the nonlinear coupled equations describing themodel's...
A model called two-dimensional non-isothermal distributed transistor direct current model for bipolar transistors is proposed.In this model,the high injection effect in thebase,the kirk effect,and the current crowding effect caused by the in-base resistanceand the emitter metallized sheet resistance are considered.The fact that the three-dimen-sional non-uniform temperature distribution will influence the effects mentioned aboveis also considered.Using a computer,the nonlinear coupled equations describing themodel's electric and thermal characteristics have been solved with the descent method.The two-dimensional values of the temperature and the current in the emitter region oftransistors have been presented.The computed results are in good agreement with thosemeasured by experiment.With this model,we can carry on with the computer aideddesign of the transistors,predict the safe operating area of the power transistors,and direct the reliability design of the devices.
In this paper the authors propose a new method to accurately the performance of the automotive naturally aspirateddiesel engine used on plateau condition.Based on the simulation tests,it is verified that the maximum errors of 2.6 and 1.81% in horse-power and specific fuel consumption of the diesel engine respeetively are achieved by this method when the motor vehieles oprated at an altitude of less than 5000 m.
A predictive power control algorithm for the uplink transmission in wideband code division multiple access (WCDMA) systems is presented. Using the optimal linear prediction, the interference to the desired user for the future instant is estimated from current and past interference. The result is then used to derive the optimum power levels of the mobile transmitters in the system. It makes the signal-to-interference ratio (SIR) more close to its minimum required level. Simulation results show that the algorithm...
A predictive power control algorithm for the uplink transmission in wideband code division multiple access (WCDMA) systems is presented. Using the optimal linear prediction, the interference to the desired user for the future instant is estimated from current and past interference. The result is then used to derive the optimum power levels of the mobile transmitters in the system. It makes the signal-to-interference ratio (SIR) more close to its minimum required level. Simulation results show that the algorithm can yield not only higher control precision, fast convergence speed, and better system stability, but also lower drop-off probability and increased system capacity compared to existing schemes.
预测功率
predictive power
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