摘要：Zero correlation window （ZCW） or zero correlation zone （ZCZ） sequence can be used in quasi-synchronous code division multiple access （QS-CDMA） system to eliminate multiple access and multipath interferences. However, as the length of ZCW or ZCZ increases, fewer sequences are available. Recently, a new concept, sequence set with group-wise zero correlation window is introduced, which can increase the number of available sequences for a QS-CDMA system. In this article, a new method for generating sequence set with group-wise zero correlation window is presented. This method is based on a Hadamard matrix of size N×N and a pair of Hadamard matrices of size M×M. Compared with previous methods, the proposed sequence set has a group-wise zero correlation window for both periodic and aperiodic cross-correlation functions.

摘要：An optimal design approach of high order FIR digital filter is developed based on the algorithm of neural networks with cosine basis function . The main idea is to minimize the sum of the square errors between the amplitude response of the desired FIR filter and that of the designed by training the weights of neural networks, then obtains the impulse response of FIR digital filter . The convergence theorem of the neural networks algorithm is presented and proved, and the optimal design method is introduced by designing four kinds of FIR digital filters , i.e., low-pass, high-pass, bandpass , and band-stop FIR digital filter. The results of the amplitude responses show that attenuation in stop-bands is more than 60 dB with no ripple and pulse existing in pass-bands, and cutoff frequency of passband and stop-band is easily controlled precisely .The presented optimal design approach of high order FIR digital filter is significantly effective.

摘要：In this paper,the authors analyze the stability of a class of interconnected systems withsubsystem unmodeled dynamics and dynamic interactions employing decentralized adaptive controllersdesigned by Wen,Zhou,and Wang (2008) in the presence of actuator *** will be shown that theglobal stability of the remaining closed-loop system is still ensured and the outputs are also regulatedto zero when some subsystems break down.

摘要：An approach is proposed to design decentralized state feedback H ∞ suboptimal controllers for LTI interconnected large scale systems. The parametrization theorem of decentralized robust state feedback controllers is developed in two steps and the design condition for the feedback gain is in the form of matrix inequalities. An iterative solution algorithm based on linear matrix inequality(LMI) techniques is proposed to obtain the decentralized feedback gain. The given examples are taken to show the application and the convergence of the algorithm.

摘要：The remote terminal unit(RTU)is an important part of the power grid dispatching automation in the distribution automation(SCADA).The design of LPC2294 RTU based on ARM7TDMI(-S)chip has been discussed. The hardware and software design of 2294 has been introduced in detail.

摘要：This paper deisgns a new kind of electrical appartus which developed by programmable logic devices FPGA and produce 2Hz,100Hz sine and rectangular wave signals based on the direct digital frequency synthesis *** testing,the frequency of output signal is precise,the output waveforms are *** of using FPGA,the Peripheral equipments are fewer,with design flexible,field programmable,easy debugged and small volume.

摘要：The paper is concerned with the digital design of the system of servo-position control for medium-low power DC *** paper will be focused on the digitization design of the *** of PWM will be given first in this *** to the theory of PWM rules and the knowledge of computer control technology,the paper will design the digital servo-position system that has a good characteristic of stability and dynamic response.

摘要：In this paper a novel log-domain current-mode integrator based on MOS transistors in subthreshold is proposed. The integrator's time-constant is tunable by varying a reference bias current. By use of the integrator, a fifth-order Chebyshev lowpass filter with 0.1dB ripples is designed. The simulation results demonstrate that the proposed filter has such advantages as low power supply(1.5V), very low power dissipation (μW level), nearly ideal frequency response, very small sensitivity to components in passband, and adjustable cut-off frequency over a wide *** circuit is composed of NMOS transistors and grounded capacitors which make it suitable for fully integrated circuit implementation.

摘要：There are large errors of linear measurement when the thermocouple measure temperature as temperature *** order to improve the measurement precision,the sensor cold junction compensation and nonlinear compensation are usually *** the circumstances that the cold junction’s temperature is determinate,there is biggish nonlinear between thermoelectric power and temperature signals of the thermocouple sensor’s *** order to solve the problem,this paper proposed a practical method of linear compensation,introduced the principle of linear compensation and gave the corresponding compensation circuit and circuit *** circuit has the characteristic of simpleness,high reliability,small linear error and so on.

摘要：The design of the power line carrier communication system was introduced in this paper,DSP was adopted as the hardware platform to complete the core *** sending terminal delivered the collecting data to the DSP receiving terminal through the power line carrier, and the DSP receiving terminal send the data to PC through a serial *** design improved the power line carrier communication system and the data transmission became faster and more *** experiment results showed that the PER of the receiving data is less than 0.4%, which satisfied the power line carrier communication requirement Our design is feasible and effective.