Design of RF Transmitter with high speed for Magnetic Resonance Imaging (MRI) using 8-Core DDS System of FPGA
| Main Authors: | Dontabhaktuni Jayakumar, B Pulla Rao2, B Satyanarayana |
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| Format: | Article |
| Terbitan: |
, 2018
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/1187390 |
Daftar Isi:
- An overall goal of the research is to investigate a new approach to the MRI RF Transmitter. Design a high-speed MRI RF transmitter. The goal is to explore the potential of a built-in DDS core of an FPGA chip to generate a dual-channel output at a 1 GHz sampling frequency of each. This output will be processed by a dual-input DAC chip for a total of 2 GHz sampling rate. The entire system should be able to generate the output signal ranging from 100 kHz to 750MHz. To accomplish this goal, it is necessary to study and to investigate the structures of these features to see how they could be utilized as a main core in a pulse generator According to the datasheet provided by Xilinx, a DDS core has a single sine or/ and cosine output signal. The DDS core can operate at a maximum clock of 250 MHz. A 250 MHz clock speed is insufficient to generate outputs at 1 GHz sampling frequency. Consequently, the proposed custom DDS system is expected to quadruple the clock speed of the system by implementing multiple DDS core modules within the system.