Envelope regulation in a frequency-modulated continuous-wave radar system

1. A transceiver system, comprising:

a local oscillator configured to generate a chirp signal, wherein the chirp signal comprises a plurality of chirps, and wherein each of the chirps has a corresponding envelope;

a transmitter configured to transmit a signal corresponding to the chirp signal; and

a modulation circuit configured to modulate the transmitted signal by regulating a magnitude of one or more portions of the chirp envelopes in a predetermined pattern based at least in part on interference associated with other signals, wherein the modulation suppresses a non-linear portion of the transmitted signal.

2. The transceiver system of claim 1 , comprising:

a receiver configured to detect one or more signals; and

a processor configured to determine whether one or more detected signals has a pattern that matches the predetermined pattern of the transmitted signal.

3. The transceiver system of claim 1 , wherein regulating the magnitude of one or more portions of the chirp envelopes in the predetermined pattern comprises:

setting a magnitude of one or more first envelopes based at least in part on a first integer value; and

setting a magnitude of one or more second envelopes based at least in part on a second integer value,

wherein the first integer value is different from the second integer value.

4. The transceiver system of claim 3 , wherein the first integer value and the second integer value correspond to binary numbers.

5. The transceiver system of claim 1 , wherein each of the chirps has a corresponding width, and wherein the modulation circuit is configured to truncate a width of one or more of the chirps by imposing a rectangular wave on the chirp signal.

6. The transceiver system of claim 1 , wherein the modulation suppresses the non-linear portion of the transmitted signal to zero or a fixed value and the non-linear portion of the transmitted signal is associated with resettling.

7. The transceiver system of claim 1 , wherein each of the chirps has a corresponding width, and wherein the modulation circuit is configured to truncate a width of one or more of the chirps by applying a window function to the chirp signal.

8. A signal modulation method, comprising:

generating a chirp signal using a local oscillator, wherein the chirp signal comprises a plurality of chirps, and wherein each of the chirps has a corresponding envelope;

transmitting, using a transmitter, a signal corresponding to the chirp signal; and

modulating, using a modulation circuit, the transmitted signal to regulate a magnitude of one or more portions of the chirp envelopes in a predetermined pattern based at least in part on interference associated with other signals, and

wherein the modulation suppresses a non-linear portion of the transmitted signal.

9. The signal modulation method of claim 8 , wherein the method comprises:

detecting one or more signals at a receiver; and

determining, at a processor, whether one or more detected signals has a pattern that matches the predetermined pattern of the transmitted signal.

10. The signal modulation method of claim 8 , wherein regulating the magnitude of one or more portions of the chirp envelopes in the predetermined pattern comprises:

setting a magnitude of one or more first envelopes based at least in part on a first integer value; and

setting a magnitude of one or more second envelopes based at least in part on a second integer value,

wherein the first integer value is different from the second integer value.

11. The signal modulation method of claim 10 , wherein the first integer value and the second integer value correspond to binary numbers.

12. The signal modulation method of claim 8 , the method comprises reducing a width of one or more of the chirps by imposing a rectangular wave on the chirp signal.

13. The signal modulation method of claim 8 , wherein the modulation suppresses the non-linear portion of the transmitted signal to zero or a fixed value and the non-linear portion of the transmitted signal is associated with resettling.

14. The signal modulation method of claim 8 , wherein the method comprises reducing a width of one or more of the chirps by applying window function to the chirp signal.

15. A non-transitory computer-readable storage medium for use with an electronic device, the computer-readable storage medium storing program instructions configured to be executed by a processor, wherein, when executed by the processor, the program instructions cause the electronic device to perform operations comprising:

generating a chirp signal using an oscillation circuit, wherein the chirp signal comprises a plurality of chirps, and wherein each of the chirps has a corresponding envelope;

transmitting a signal corresponding to the chirp signal from a transmitter; and

causing a modulation circuit to modulate the transmitted signal by regulating a magnitude of one or more portions of the chirp envelopes in a predetermined pattern based at least in part on interference associated with other signals, wherein the modulation suppresses a non-linear portion of the transmitted signal.

16. The non-transitory computer-readable storage medium of claim 15 , wherein the operations comprise:

detecting one or more signals using a receiver; and

determining whether one or more detected signals has a pattern that matches the predetermined pattern of the transmitted signal.

17. The non-transitory computer-readable storage medium of claim 15 , wherein regulating the magnitude of one or more portions of the chirp envelopes in the predetermined pattern comprises:

setting a magnitude of one or more first envelopes based at least in part on a first integer value; and

setting a magnitude of one or more second envelopes based at least in part on a second integer value,

wherein the first integer value is different from the second integer value.

18. The non-transitory computer-readable storage medium of claim 17 , wherein the first integer value and the second integer value correspond to binary numbers.

19. The non-transitory computer-readable storage medium of claim 15 , wherein the operations comprise causing the modulation circuit to truncate a width of one or more of the chirps by imposing a square wave on the chirp signal.

20. The non-transitory computer-readable storage medium of claim 15 , wherein the modulation suppresses the non-linear portion of the transmitted signal to zero or a fixed value and the non-linear portion of the transmitted signal is associated with resettling.