51 Research and Design, Electronic Engineers website - Embedded Systems, MCU, DSP, EDA, Test and Measurement, Components, Communications, Power, Microelectronics, Semiconductors

Friday, December 12th, 2008 at 06:22 | No comments

Categories: Communication Networks

Tags: FPGA, radio frequency, receiver, software radio

Short Content: Abstract: Introduced now the satellite positioning system (GNSS) in receiver's antenna size enlargement technology, the software radio technology and FPGA realize the technology, as well as they in two-dimensional ballistic correction blasting fuse (2-DCCF) application. Finally, in the article gave has used in revolving the ball two-dimensional ballistic correction blasting fuse's GPS receiving system's principle of work diagram. Key word: Two-dimensional ballistic correction blasting fuse; Satellite positioning signal receiver; Revolving ball Abstract: In this paper, the beam-forming ...

Friday, December 12th, 2008 at 04:09 | No comments

Categories: Communication Networks

Tags: audio power enlarges the, CATV, controller, digit, The radio frequency

Short Content: The traditional broadcast system, needs by artificial fixed time to operate generally, and can only realize a group broadcast, the function are few, the tradition hits the bell equipment, the sound source is unitary, the sound is grating, along with school educational reform unceasingly thorough, these audiovisual education equipment has not been able to satisfy the school the request and the development, according to the school demand, the author uses the computer multimedia technologies and the monolithic integrated circuit technology, ...

Friday, December 12th, 2008 at 01:56 | No comments

Categories: Communication Networks

Tags: power amplifier, Sensor, Wireless base depot

Short Content: The honeycomb correspondence's development and the advanced modulation scheme's relations are day by day close. In the most new generation (2.5G and 3G) in the base depot, the design strategy including realizes at the same time the high linearity to reduce to the power loss the smallest method. For example, through the monitoring base depot power amplifier's performance, may the power amplifier (PA) output maximization, simultaneously obtain the best linearity and the efficiency. What is lucky, use separation type integrated ...

Thursday, December 11th, 2008 at 23:42 | No comments

Categories: Communication Networks

Tags: data transmission, radio frequency amplifier, Wireless network, WLAN

Short Content: Along with the computer technology and networking's vigorous development and the telecommunication market's opening, each high speed's broadband access way emerges unceasingly at present, specially the wireless network's application domain unceasingly is growing. But relies on it based on the IEEE 802.11 wireless ethernet standard's wide band wireless access system to reach as high as 11M~54Mbps the data transfer rate, and the fishing net speed is quick, the operation cost is low and the cost of investment repays and so ...

Thursday, December 11th, 2008 at 21:29 | No comments

Categories: Communication Networks

Tags: development, Embedded, Network service

Short Content: Introduction The embedded system is after the IT networking, another new technological development direction. Because the embedded system has the volume to be small, performance, the power loss is low, reliability high as well as face profession application prominent characteristic, at present already the widespread application in the military national defense, expended the electron, the network service, the industrial control and so on each domain. Along with the computer technology and communication's development, embedded system's research and the development ...

Thursday, December 11th, 2008 at 19:16 | No comments

Categories: Communication Networks

Tags: connection, development, Embedded, ethernet, microprocessor

Short Content: The abstract in the automated control and other civil equipment, domains and so on industrial control like power equipment system, the numerous equipment's foreign communication connections was still the low speed serial port. But the low speed serial port has its inherent shortcoming: Is unable to concentrate, comprehensive, accurate and real-time monitors the data. This article introduced that based on the microprocessor SEP3203 serial port ethernet switch's ethernet connection's software and hardware design method, it may change traditional the serial ...

Thursday, December 11th, 2008 at 17:02 | No comments

Categories: Communication Networks

Tags: controls remotely the, Micro controller, radio frequency, The RKE

Short Content:     The RKE system regarding enhances automobile's security, the control to have the important meaning. The majority RKE systems have the automobile security, the warning function as well as use in the automobile, suitcase's entrance guard control, some systems also include the function which the remote control start automobile and the automobile seek. New generation RKE uses the two-way communication hopefully, installed controls remotely vehicle door switch PKE in the automobile (Remote Keyless Entry) the plan regarding automobile's disposition, already ...

Thursday, December 11th, 2008 at 14:49 | No comments

Categories: Communication Networks

Tags: measuring instrument, pxi main line, radio frequency

Short Content: Refers to PXI and the hypothesized instrument, possibly will have many engineers to have a summary impression, that will be, the hypothesized instrument will grasp the modulation design concept, will rely on the PXI main line platform, will be adding on uses in common the PC resources, in domains and so on test survey, control, monitoring had already obtained not the vulgar achievement. Might regarding radio frequency PXI measuring instrument's concrete progress, still have many engineers the understanding not to ...

Thursday, December 11th, 2008 at 12:36 | No comments

Categories: Communication Networks

Tags: power amplifier, radio frequency, TD-SCDMA

Short Content: 　　TD-SCDMA (synchronization code division multiple access turning on) is third generation mobile communication one of three big mainstream standards, is our country has the proprietary intellectual property rights correspondence standard, it symbolizes that China already entered the world advanced ranks in the mobile communication domain, at present, the TD-SCDMA commercialized advancement is carrying on [1] smoothly. What the TD-SCDMA system uses is the QPSK/8PSK modulation, in the high speed data transmission application, has used like the 16QAM such modulation system. ...

Thursday, December 11th, 2008 at 10:22 | No comments

Categories: Communication Networks

Tags: CAN, The heat inserts pulls out

Short Content:        The CAN transceiver must in the very severe under the working conditions guarantee that the data transmission the reliability, this set the very high request to component's electronic performance. The transceiver usually is between the expensive node component and the CAN main line the only connection, therefore Texas Instruments (TI) Corporation's CAN transceiver SN65HVD1050 has many job safety characteristic speaking of the CAN application specially importantly, for example, the anti-electromagnetism (EM) disturbance, the low EM radiation, noise abatement, the static ...