Simulation of DAC-based truncated sinc excitation pulse generator
سال انتشار: 1394
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 457
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شناسه ملی سند علمی:
KBEI02_263
تاریخ نمایه سازی: 5 بهمن 1395
چکیده مقاله:
A signal with high quality rectangular frequency spectrum is generated for MRI medical imaging applications. The center frequency of the signal is 4MHz and the bandwidth is8KHz. This signal is generated by feeding Digital to Analog Converter (DAC) with repetitive truncated and modulated sincfunction. Resolution and update rate of the required DAC is chosen theoretically and by simulations in MATLAB. Further simulations are carried out to optimize the truncating, whichresulted in 800Hz transition bandwidth, -32.27dB pass-band ripple, -37.92dB stop-band ripple and 6.977MHz image signalgap by means of feeding a 15MSPS 14-bit DAC with 75,000 samples.
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نویسندگان
a Aliakbari
Faculty of Electrical Engineering K. N. Toosi University of Technology Tehran, Iran
Yousef Mohammadi Yeganeh
Faculty of Electrical Engineering K. N. Toosi University of Technology Tehran, Iran
s Safari
Faculty of Electrical Engineering K. N. Toosi University of Technology Tehran, Iran