vitis_hls_proj

FFT implementation based on array interface

array_fft

flowchart TD
    A[Input direction] --> B[dummy_proc_fe]
    C[Input array] --> B
    B -->|Config parameters<br>Copy datas| D[hls::fft]
    D -->|FFT calculation| E[dummy_proc_be]
    E --> F[Output array]
    E --> G[Overflow flag]

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• generate .txt with Matlab

input_real = real(x);
input_imag = imag(x);
dlmwrite('input_x_real.txt', input_real', 'precision', '%.10f');
dlmwrite('input_x_imag.txt', input_imag', 'precision', '%.10f');

FFT implementation based on stream interface

stream_fft

flowchart TD
    A[Input direction] --> B[dummy_proc_fe]
    C[Input stream] -->|Streaming Reading| B
    B -->|Config parameters<br>Write to array| D[hls::fft]
    D -->|FFT calculation| E[dummy_proc_be]
    E -->|Streaming Write| F[Output stream]
    E --> G[Overflow flag]

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Matched filter system for radar signal processing

match_filter

• filter_top

flowchart TD
    A[Input stream x] --> B[gen_x1]
    B -->|x1 stream| C[match_filter]
    C -->|x_j stream| D[shunt_judgment]
    D -->|x_jc stream| E[find_max]
    D -->|x_judgment stream| F[Judge output]
    E -->|max_out| G[Output peak]
    H[jx] --> C
    I[gamma] --> C

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• match_filter

flowchart LR
A[gen_filter] -->|Generate filter| B[fftshift]
B --> C[fft_top]
C --> D[fftshift]
D --> E[conjugate]

F[Input signal] --> G[fft_top]
G --> H[fftshift]

E & H --> I[cplx_mult]
I --> J[fftshift]
J --> K[ifft_top]
K --> L[out_select]

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Note: All projects are implemented in Vitis HLS 2022.2.