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Based on high speed transmission technology 0FDM system design
Wednesday, November 19th, 2008 at 09:39 | No commentsCategories: Communication NetworksShort Content: The abstract union software radio the thought that proposed one kind based on the high speed transmission technology OFDM system design plan, including hardware constitution and system design realization; Has constructed an general hardware platform, may realize the high speed multi-carriers and the conventional single carrier modulation demodulation in this platform.Key word Orthogonal Frequency Division Multiplexing (OFDM) DSP FPGA DDS DDC Introduction The software radio (Software Radios) is one kind of new radio traffic architecture. Specifically speaking, the software ... -
Based on high speed transmission technology OFDM system design
Thursday, October 30th, 2008 at 01:50 | No commentsCategories: Communication NetworksShort Content: The abstract union software radio the thought that proposed one kind based on the high speed transmission technology OFDM system design plan, including hardware constitution and system design realization; Has constructed an general hardware platform, may realize the high speed multi-carriers and the conventional single carrier modulation demodulation in this platform.Key word Orthogonal Frequency Division Multiplexing (OFDM) DSP FPGA DDS DDC Introduction The software radio (Software Radios) is one kind of new radio traffic architecture. Specifically speaking, the software ... -
With realizes - en.51rd.net based on the FPGA DS/CDMA despread demodulation module design
Wednesday, September 17th, 2008 at 09:09 | No commentsCategories: EDA/PLDShort Content: Abstract: In the article proposed one kind of DS/CDMA wide frequency modulation and the despread demodulation system model, has analyzed this model wide frequency modulation principle and the despread demodulation principle, with was designing has used in realizing the despread demodulation module radio frequency circuit and the digital baseband processing electric circuit diagram, has analyzed their composition and the work process, used in the component as well as the design used the essential module showed in detail, finally introduced this ... -
Based on DSP and AD9852 random signal generating device
Wednesday, September 10th, 2008 at 05:15 | No commentsCategories: DSPShort 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 ... -
With realizes - en.51rd.net based on the FPGA DDS frequency-modulated signal’s research
Sunday, August 24th, 2008 at 08:56 | No commentsCategories: EDA/PLDTags: DDS, frequency-modulated signalShort Content: 1 introduction The direct digit frequency synthesizer (DDS) the technology, has the frequency cut speed to be quick, very easy to raise the frequency resolution, to request low, the programmable entire digitization to the hardware to be advantageous for the monolithic integration, to be advantageous in production merits and so on reduces the cost, to enhance the reliability and to be advantageous. At present each big chip manufacture manufacturer one after another promotes uses the advanced CMOS craft production ... -
Against steals the monitoring device frequency sweep supply oscillator based on DSP and the DDS commodity
Saturday, August 23rd, 2008 at 01:16 | No commentsCategories: DSPShort Content: Abstract: Proposed that one kind realizes the method based on digital signal processor (DSP) and the direct digital signal synthesizer (DDS) technology's high accuracy frequency sweep supply oscillator, discusses AD9834 DDS the key job principle, to sweep the frequency wave supply oscillator emphatically the hardware architecture and the software flow.Key word: The commodity against steals monitoring device (EAS); TMS320VC5410; AD9834; Frequency sweep supply oscillator 1 introduction The commodity against steals the monitoring device (Electronic Article Surveillance) to be called EAS, ... -
Realize - en.51rd.net based on the DSP Builder DDS design and FPGA
Monday, August 18th, 2008 at 19:46 | No commentsCategories: EDA/PLDShort Content: The direct digital synthesizer, is uses the digital technique one kind of new frequency synthesis technology, he through the control frequency, the phase increase's length of stride, produces each kind of different frequency signal. He has a series of merits; High frequency resolution; May realize the fast frequency cut; When frequency change can maintain the phase continual; Very easy to realize the frequency, the phase and the scope numerical control modulation and so on. At present may use the ... -
Realizes the multi-channel voice/data multiple connection equipment using FPGA
Sunday, August 17th, 2008 at 23:46 | No commentsCategories: EDA/PLDShort Content: Abstract: This article used FPGA to complete 8 group synchronized voices and 16 group asynchronous data multiple connection meets the process with the minute, and before having realized multiple connection's frame synchronization capture and carries on the frequency division using DDS to the clock source to obtain needs clock's process. This design's control module completes by the VHDL language, finally tool and the Modelsim tool has completed this design behavior simulation, the layout wiring simulation and the succession simulation using ... -
Designs - en.51rd.net based on the monolithic integrated circuit and a AD9858 4 frequency fast-frequency hopping
Wednesday, August 13th, 2008 at 15:10 | No commentsCategories: SCMTags: DDSShort Content: Abstract: In has analyzed the DDS basic principle as well as in the AD9858 essential feature foundation, introduced AD9858 delivers the number way and the monolithic integrated circuit interface routine. Gave has realized the frequency-hopping time using the AD9858 interior register is smaller than the 50ns 4 frequency fast-frequency hopping's concrete method. Key word: DDS; AD9858; Fast-frequency hopping In the electronic system, needs the application frequency synthesis technology to realize the frequency-hopping source design frequently. The frequency synthesis ...
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