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Saturday, October 4th, 2008 at 18:48 | No comments

Categories: DSP

Tags: DSP, DUC, shortwave array, signal generating device

Short Content: First, introduction The array signal processing takes the digital signal processing domain an important branch, widely applies in the radar, the sound navigation and ranging, the correspondence, the seismic survey and the medical image formation and so on numerous domains; Shortwave frequency band commonly used in shortwave direction finding and wave beam synthesis technology. In the shortwave frequency band, the array signal processing equipment usually includes the shortwave antenna array, the shortwave multiwave road receiver, rear end the array signal ...

Thursday, September 25th, 2008 at 06:36 | No comments

Categories: DSP

Tags: DSP, DUC, shortwave, signal generating device

Short Content: First, introduction     The array signal processing takes the digital signal processing domain an important branch, widely applies in the radar, the sound navigation and ranging, the correspondence, the seismic survey and the medical image formation and so on numerous domains; Shortwave frequency band commonly used in shortwave direction finding and wave beam synthesis technology.     In the shortwave frequency band, the array signal processing equipment usually includes the shortwave antenna array, the shortwave multiwave road receiver, rear end the ...

Wednesday, September 24th, 2008 at 01:07 | No comments

Categories: SCM

Tags: AT89S51, PWM, signal generating device

Short Content: Abstract: Introduced one kind of pulse turbulent flow non-destructive inspection system uses multi-profile special-purpose PWM signal generating device design. This signal generating device take the monolithic integrated circuit as the core control unit, through realizes to the periphery chip's control to the output wave shape frequency, the voltage peak-to-peak value, the dutyfactor continual adjustment, and can carry on the real time display to the movement signal parameter. After the experimental verification, this signal generating device is advantageous for the observation ...

Wednesday, September 10th, 2008 at 05:15 | No comments

Categories: DSP

Tags: AD9852, DDS, DSP, signal generating device, TMS320LF2407A

Short Content:     The direct digital frequency synthesis (DDS) the technology is after the direct frequency synthesis and the indirect frequency synthesis, along with digital integrated circuit and microelectronic technology development, but rapidly expand third generation frequency synthesis technology. The DDS technology has the relative bandwidth width, the frequency switching time to be short, the frequency resolution higher merit, the output phase is continual, the frequency, the phase and the scope may realize the program control, commonly used in high accuracy frequency ...