Wireless communications device with white gaussian noise generator and related methods
View Patent ↗A wireless communications device may include a wireless transmitter, a modulator connected to the wireless transmitter, and a white Gaussian noise generator connected to the modulator. The white Gaussian noise generator may include at least one pseudorandom number generator, and a fast Walsh transform module for generating white Gaussian noise based upon the pseudorandom numbers.
1. A wireless communications device comprising:
a wireless transmitter;
a modulator connected to said wireless transmitter; and
a white Gaussian noise generator connected to said modulator and comprising
at least one pseudorandom number generator for generating pseudorandom numbers,
a fast Walsh transform module for generating white Gaussian noise based upon the pseudorandom numbers and comprising a plurality of parallel outputs, and
a parallel-to-serial converter connected to the parallel outputs of said fast Walsh transform module.
2. The wireless communications device of claim 1 white Gaussian noise generator further comprises a mean control module connected to a desired one of the parallel outputs for selectively disconnecting the desired parallel output.
3. The wireless communications device of claim 2 wherein said mean control module selectively disconnects a first one of the parallel outputs to provide zero mean white Gaussian noise.
4. The wireless communications device of claim 1 said at least one pseudorandom number generator comprises at least one uniform pseudorandom number generator.
5. The wireless communications device of claim 4 wherein said at least one uniform pseudorandom number generator comprises a linear feedback shift register (LFSR).
6. The wireless communications device of claim 5 wherein said LFSR generates the pseudorandom numbers using a polynomial.
7. The wireless communications device of claim 1 further comprising a demodulator connected to said white Gaussian noise generator, and a wireless receiver connected to said demodulator.
8. The wireless communications device of claim 1 wherein said at least one pseudorandom number generator comprises at least one serial pseudorandom number generator; and wherein said white Gaussian noise generator further comprises a serial-to-parallel converter connected between said at least one serial pseudorandom number generator and said fast Walsh transform module.
9. The wireless communications device of claim 1 wherein said white Gaussian noise generator further comprises a field-programmable gate array (FPGA).
10. A wireless communications device comprising:
a wireless receiver;
a demodulator connected to said wireless receiver; and
a white Gaussian noise generator connected to said demodulator and comprising
at least one pseudorandom number generator for generating pseudorandom numbers,
a fast Walsh transform module for generating white Gaussian noise based upon the pseudorandom numbers and comprising a plurality of parallel outputs, and
a parallel-to-serial converter connected to the parallel outputs of said fast Walsh transform module.
11. The wireless communications device of claim 10 wherein said white Gaussian noise generator further comprises a mean control module connected to a desired one of the parallel outputs for selectively disconnecting the desired parallel output.
12. The wireless communications device of claim 11 wherein said mean control module selectively disconnects a first one of the parallel outputs to provide zero mean white Gaussian noise.
13. The wireless communications device of claim 10 wherein, said at least one pseudorandom number generator comprises at least one uniform pseudorandom number generator.
14. The wireless communications device of claim 13 wherein said at least one uniform pseudorandom number generator comprises a linear feedback shift register (LFSR).
15. The wireless communications device of claim 14 wherein said LFSR generates the pseudorandom numbers using a polynomial.
16. The wireless communications device of claim 10 wherein said at least one pseudorandom number generator comprises at least one uniform serial pseudorandom number generator; and wherein said white Gaussian noise generator further comprises a serial-to-parallel converter connected between said at least one uniform serial pseudorandom number generator and said fast Walsh transform module.
17. The wireless communications device of claim 10 wherein said white Gaussian noise generator further comprises a field-programmable gate array (FPGA).
18. A white Gaussian noise generator comprising:
at least one pseudorandom number generator for generating pseudorandom numbers;
a fast Walsh transform module for generating white Gaussian noise based upon the pseudorandom numbers and comprising a plurality of parallel outputs; and
a parallel-to-serial converter connected to the parallel outputs of said fast Walsh transform module.
19. The white Gaussian noise generator of claim 18 a mean control module connected to a desired one of the parallel outputs for selectively disconnecting the desired parallel output.
20. The white Gaussian noise generator of claim 18 wherein said at least one pseudorandom number generator comprises at least one uniform pseudorandom number generator.
21. The white Gaussian noise generator of claim 20 wherein said at least one uniform pseudorandom number generator comprises a linear feedback shift register (LFSR).
22. The white Gaussian noise generator of claim 21 wherein said LFSR generates the pseudorandom numbers using a polynomial.
23. The white Gaussian noise generator of claim 18 wherein said at least one pseudorandom number generator comprises at least one serial pseudorandom number generator; and wherein said white Gaussian noise generator further comprises a serial-to-parallel converter connected between said at least one serial pseudorandom number generator and said fast Walsh transform module.
24. The white Gaussian noise generator of claim 18 further comprises a field-programmable gate array (FPGA).
25. A wireless communications device comprising:
a wireless transmitter;
a modulator connected to said wireless transmitter; and
a white Gaussian noise generator connected to said modulator and comprising
at least one serial pseudorandom number generator for generating pseudorandom numbers,
a fast Walsh transform module for generating white Gaussian noise based upon the pseudorandom numbers, and
a serial-to-parallel converter connected between said at least one serial pseudorandom number generator and said fast Walsh transform module.
26. The wireless communications device of claim 25 wherein said fast Walsh transform module comprises a plurality of parallel outputs; and wherein said white Gaussian noise generator further comprises a mean control module connected to a desired one of the parallel outputs for selectively disconnecting the desired parallel output.
27. The wireless communications device of claim 25 further comprising a demodulator connected to said white Gaussian noise generator, and a wireless receiver connected to said demodulator.
28. A wireless communications device comprising:
a wireless receiver;
a demodulator connected to said wireless receiver; and
a white Gaussian noise generator connected to said demodulator and comprising
at least one uniform pseudorandom number generator for generating pseudorandom numbers,
a fast Walsh transform module for generating white Gaussian noise based upon the pseudorandom numbers, and
a serial-to-parallel converter connected between said at least one uniform serial pseudorandom number generator and said fast Walsh transform module.
29. The wireless communications device of claim 28 wherein said fast Walsh transform module comprises a plurality of parallel outputs; and wherein said white Gaussian noise generator further comprises a mean control module connected to a desired one of the parallel outputs for selectively disconnecting the desired parallel output.
30. A white Gaussian noise generator comprising:
at least one serial pseudorandom number generator for generating pseudorandom numbers;
a fast Walsh transform module for generating white Gaussian noise based upon the pseudorandom, and
a serial-to-parallel converter connected between said at least one serial pseudorandom number generator and said fast Walsh transform module.
31. The white Gaussian noise generator of claim 30 wherein said fast Walsh transform module comprises a plurality of parallel outputs; and further comprising a mean control module connected to a desired one of the parallel outputs for selectively disconnecting the desired parallel output.