Radio frequency interference mitigation in weather sensing
Embodiments regard techniques for mitigating radio frequency interference (RFI) in weather data. A method includes receiving raw pulse returns, censoring the raw pulse returns to alter data of the raw pulse returns that is affected by the RFI resulting in censored pulse returns, compressing the censored pulse returns resulting in censored, compressed pulse returns, and transmitting, by an antenna, the censored, compressed pulse returns.
1. A device comprising:
processing circuitry;
a memory including instructions that, when performed by the processing circuitry, cause the processing circuitry to perform operations for radio frequency interference (RFI) mitigated weather pulse returns, the operations comprising:
receiving raw pulse returns from a weather radar;
censoring the raw pulse returns in a frequency domain, by removing, altering, and replacing the raw pulse returns that are affected by the RFI resulting in censored pulse returns, wherein censoring includes comparing an amplitude of a current cell to an average amplitude of a specified number of cells that are directly adjacent to the current cell; and
compressing the censored pulse returns resulting in censored, compressed pulse returns; and
a channel configured to digitally transmit the censored, compressed pulse returns.
2. The device of claim 1 , wherein the operations further comprise censoring the raw pulse returns in a time domain, wherein the censoring includes comparing an amplitude of a current cell to an average amplitude of a specified number of cells that are directly adjacent to the current cell, in time.
3. The device of claim 2 , wherein the average amplitude of the specified number of directly adjacent cells includes cells that lead the current cell in time and cells that lag the current cell in time.
4. The device of claim 3 , wherein censoring the raw pulse returns in the time domain includes setting a value of the current cell to an average of (i) the specified number of directly adjacent leading cells, (ii) the specified number of directly adjacent lagging cells, or (iii) a combination thereof.
5. The device of claim 2 , wherein the operations further comprise performing a fast Fourier transform on the censored pulse returns in the time domain to generate censored pulse returns in a frequency domain.
6. The device of claim 1 , wherein the average amplitude of the specified number of directly adjacent cells includes cells that lead the current cell in frequency and cells that lag the current cell in frequency.
7. The device of claim 6 , wherein censoring the raw pulse returns in the frequency domain includes setting a value of the current cell to an average of (i) the specified number of directly adjacent leading cells, (ii) the specified number of directly adjacent lagging cells, (iii) a combination thereof, or (iv) zero.
8. A method for generating radio frequency interference (RFI) mitigated weather data, the operations comprising:
receiving raw pulse returns;
censoring the raw pulse returns in a frequency domain by removing, altering, and replacing the raw pulse returns that are affected by the RFI resulting in censored pulse returns, wherein censoring includes comparing an amplitude of a current cell to an average amplitude of a specified number of cells that are directly adjacent to the current cell; and
compressing the censored pulse returns resulting in censored, compressed pulse returns; and
digitally transmitting the censored, compressed pulse returns.
9. The method of claim 8 , wherein the operations further comprise censoring the raw pulse returns in a time domain, wherein the censoring includes comparing an amplitude of a current cell to an average amplitude of a specified number of cells that are directly adjacent to the current cell, in time.
10. The method of claim 9 , wherein the average amplitude of the specified number of directly adjacent cells includes cells that lead the current cell in time and cells that lag the current cell in time.
11. The method of claim 10 , wherein censoring the raw pulse returns in the time domain includes setting a value of the current cell to an average of (i) the specified number of directly adjacent leading cells, (ii) the specified number of directly adjacent lagging cells, or (iii) a combination thereof.
12. The method of claim 9 , further comprising performing a fast Fourier transform on the censored pulse returns in time domain to generate censored pulse returns in a frequency domain.
13. The method of claim 8 , wherein the average amplitude of the specified number of directly adjacent cells includes cells that lead the current cell in frequency and cells that lag the current cell in frequency.
14. The method of claim 13 , wherein censoring the raw pulse returns in the frequency domain includes setting a value of the current cell to an average of (i) the specified number of directly adjacent leading cells, (ii) the specified number of directly adjacent lagging cells, (iii) a combination thereof, or (iv) zero.
15. A non-transitory machine-readable medium including instructions that, when executed by a machine, cause the machine to perform operations for generating radio frequency interference (RFI) mitigated weather data, the operations comprising:
receiving raw pulse returns;
censoring the raw pulse returns in a frequency domain by removing, altering, and replacing the raw pulse returns that are affected by the RFI resulting in censored pulse returns, wherein censoring includes comparing an amplitude of a current cell to an average amplitude of a specified number of cells that are directly adjacent to the current cell; and
compressing the censored pulse returns resulting in censored, compressed pulse returns; and
digitally transmitting the censored, compressed pulse returns.
16. The non-transitory machine-readable medium of claim 15 , wherein the operations further comprise censoring the raw pulse returns in a time domain, wherein the censoring includes comparing an amplitude of a current cell to an average amplitude of a specified number of cells that are directly adjacent to the current cell, in time.
17. The non-transitory machine-readable medium of claim 16 , wherein the average amplitude of the specified number of directly adjacent cells includes cells that lead the current cell in time and cells that lag the current cell in time.
18. The non-transitory machine-readable medium of claim 16 , wherein the operations further comprise:
performing a fast Fourier transform on the censored pulse returns in the time domain to generate censored pulse returns in a frequency domain.