Advanced Materials Research Vol. 1046

Abstract: SuperSpeed bus, also known as USB3.0 bus or SuperSpeed USB bus, is the newest USB bus technology. This paper presents an innovative DMA transfer method called Multi-thread Chain DMA for SuperSpeed bus video data transmissions. The maximum 5Gbps giant data rate of SuperSpeed bus demands a high speed and high reliability DMA method. However, traditional DMA method can not achieve this required data rate due to its separate data transmission and reception. Unlike traditional DMA method, utilizing a novel designed mechanism, Multi-thread Chain DMA transfer method transmits and receives data concurrently, achieves SuperSpeed data rate and guarantees no data loss. Furthermore, one communication protocol for SuperSpeed video transmission is designed and implemented to comply with USB Video Class (UVC) standard. The field trial has demonstrated Multi-thread Chain DMA transfer method and SuperSpeed video communication protocol in the article are feasible and rich in value of research.

Abstract: In this paper, we address a channel estimation scheme for power line communication systems based on compressed sensing techniques. With the properly designed pilot symbols, the received signals at the receiver can be reconstructed from a set of random projections, benefiting from a reduced sampling rate. Moreover, we propose a novel channel estimation structure for PLC systems, which can be applied for appropriate system design. Eventually, simulation results demonstrate that the proposed algorithm outperforms other algorithms and reduces the sample rate significantly.

Abstract: The frequency synthesizer is an important part of modern communication system. It is widely used in digital communications, satellite communications, remote telemetry, radar, navigation and other fields. For frequency source with low phase noise and low spurious, this paper gives hardware architecture and implementation method circuit realization of the X-band frequency source which use phase locked and frequency multiplier theory. Its main targets are tested. The test results show that the performance of the frequency synthesizer is preferably with lower spurious level and phase noise.

Abstract: It is very difficult to accurately analyze the performance of the antenna conformed to the elastomer because of the complex structure. Conformal coordinate method is an effective method for analyzing the complex structure of the antenna. Based on the conformal coordinate method, the millimeter-wave monolithic conformal microstrip antenna is analyzed in this paper. Using the traditional way of microstrip-fed - the middle microstrip feeding, we design the microstrip patch unit. Then we use the HFSS to simulate the antenna.

Abstract: The signal processing algorithm mainly for the FMCW automotive collision avoidance radar is studied in this paper. Through discussing the FMCW signal processing works with two-dimensional FFT algorithm, we use CZT transform to refine the velocity spectrum so as to accurately extract the velocity of the target.

Abstract: A design method of microstrip filter with good isolation is presented. In the paper, the design method of microstrip bandpass filter is introduced, and one example filter with 3.075GHz center frequency, 9% relative bandwidth is given. With the aid of microwave HFSS software, the microstrip filter is simulated. The result of simulation shows the microstrip filter has an excellent frequency response.

Abstract: In recent years, with the development of millimeter-wave MMIC chip, millimeter wave technology has been widely used. The millimeter-wave transmitter front-end is designed in this paper. By using second harmonic mixers, we reduce the operating frequency of the oscillator. By using the side exit microstrip - waveguide structure, we strengthen the compact structure. Test results show that the transmitter front-end transmission power is 33dB and its transmission band is 35.5-36GHz.

Abstract: The remote communication is an important part of electric energy data acquisition system. Currently, the electric energy data acquisition remote communication has these disadvantages such as high costs of GPRS rental , poor reliability and it’s hard to meet the demand of real-time fee control and other senior business. To solve these problems, this paper proposes a solution for electric energy data acquisition remote communication channel by using built fiber access network to combine with broadband power line carrier communication technology .This solution have achieved a good result through field pilot application and validated the feasibility of it.

Abstract: This document mainly describes the control equipment of microwave anechoic chamber RCS measurement system, which can be expanded into a generic and automatic multi-channel control system. The conventional control equipment is mainly operating in manual mode with computer control feature as secondary. Such feature causes the problems of difficult operation, complicated structure and no software portability. This generic control system is designed with DAM-E3000 series of module which is an interface module from generic sensor to computer, uses remote Ethernet connection solution, supports TCP/IP and UDP protocols, and can realize remote I/O control. This generic control system has the automatic control feature through network by using this mentioned module. In addition, the hardware structure design is simplified, and the software portability and expandability are enhanced, so that the codes programming difficulty is lowered. Therefore the system can conform to more industrial I/O signal protocols and can be used widely in various industrial environments.

Abstract: In order to reduce operation cost and improve transport capacity of China high-speed railway, train dynamic marshalling often need to be implemented between different kinds of China’s high-speed Electric Multiple Units (EMUs). Based on the operation situation of China high-speed railway, this paper analyzes the market demand and feasibility of dynamic marshalling between different kinds of EMUs, and describes the principle how to realize it by using TCN and UIC network communication technology. Some key problems which need to be solved in the process of realizing coupled control between different kinds of EMUs are pointed out, and corresponding suggestions how to solve these problems are proposed as well. Moreover, according to the technical development trend of the EMU, this paper predicts the possibility of using network communication technology based on real-time Ethernet to realize EMU marshalling and coupled control.