Apparatus and method for generating jamming signal, communication system

Patent metadata

Field	Value
Publication number	US-12250069-B2
Application number	US-202217734883-A
Country	US
Kind code	B2
Filing date	May 2, 2022
Priority date	May 3, 2021
Publication date	Mar 11, 2025
Grant date	Mar 11, 2025

Abstract

This application relates to an apparatus and method for generating a jamming signal, and a communication system. In one aspect, the method may include converting binary bits of a first communication signal to be transmitted and obtaining at least one codeword matched previously to the binary bits. The method may also include generating a second communication signal by superimposing a first conversion signal being obtained by converting the first communication signal to an up-chirp signal and a second conversion signal being obtained by converting the first communication signal to a down-chirp signal. The method further include generating a pseudo jamming signal by computing the second communication signal and the codeword.

First claim

What is claimed is:

1. A method for generating a jamming signal performed by an apparatus for generating the jamming signal, the method comprising:
obtaining at least one codeword matched previously to binary bits by converting the binary bits of a first communication signal to be transmitted to the at least one codeword;
generating a second communication signal by superimposing a first conversion signal being obtained by converting the first communication signal to an up-chirp signal and a second conversion signal being obtained by converting the first communication signal to a down-chirp signal; and
generating a pseudo jamming signal based on the second communication signal and the codeword.

2. The method of claim 1 , wherein the obtaining the at least one codeword includes converting N (where N is a natural number greater than or equal to 3) binary bits into the at least one codeword using a binary orthogonal code (BOC) encoder.

3. The method of claim 1 , wherein the first communication signal includes a single linear chirp signal.

4. The method of claim 1 , wherein the second communication signal is divided into a first section and a second section based on the period of the first communication signal, and
wherein the first conversion signal includes a 1-1 conversion signal corresponding to the first section, and a 1-2 conversion signal corresponding to the second section.

5. The method of claim 4 , wherein the second conversion signal includes a 2-1 conversion signal corresponding to the first section, and a 2-2 conversion signal corresponding to the second section.

6. The method of claim 5 , wherein the at least one codeword includes first to fourth codewords, and
wherein the generating the pseudo jamming signal includes generating the pseudo jamming signal by multiplying the 1-1 conversion signal by the first codeword, multiplying the 1-2 conversion signal by the second codeword, multiplying the 2-1 conversion signal by the third codeword, and multiplying the 2-2 conversion signal by the fourth codeword.

7. The method of claim 4 , wherein the at least one codeword includes a first codeword and a second codeword, and
wherein the generating the pseudo jamming signal includes generating the pseudo jamming signal by multiplying the 1-1 conversion signal by the first codeword and multiplying the 1-2 conversion signal by the second codeword.

8. An apparatus for generating a jamming signal, the apparatus comprising:
a codeword converter configured to obtain at least one codeword matched previously to binary bits by converting the binary bits of a first communication signal to be transmitted to the at least one codeword;
a signal superimposing unit configured to generate a second communication signal by superimposing a first conversion signal obtained by converting the first communication signal to an up-chirp signal and a second conversion signal obtained by converting the first communication signal to a down-chirp signal; and
a jamming signal generator configured to generate a pseudo jamming signal based on the second communication signal and the at least one codeword.

9. The apparatus of claim 8 , wherein the at least one codeword converter is configured to convert N (where N is a natural number greater than or equal to 3) binary bits into the at least one codeword using a binary orthogonal code (BOC) encoder.

10. The apparatus of claim 8 , wherein the first communication signal includes a single linear chirp signal.

11. The apparatus of claim 8 , wherein the second communication signal is divided into a first section and a second section based on the period of the first communication signal, and wherein the first conversion signal includes a 1-1 conversion signal corresponding to the first section, and a 1-2 conversion signal corresponding to the second section.

12. The apparatus of claim 11 , wherein the second conversion signal includes a 2-1 conversion signal corresponding to the first section, and a 2-2 conversion signal corresponding to the second section.

13. The apparatus of claim 12 , wherein the at least one codeword includes first to fourth codewords, and
wherein the jamming signal generator is configured to generate the pseudo jamming signal by multiplying the 1-1 conversion signal by the first codeword, multiplying the 1-2 conversion signal by the second codeword, multiplying the 2-1 conversion signal by the third codeword, and multiplying the 2-2 conversion signal by the fourth codeword.

14. The apparatus of claim 11 , wherein the at least one codeword includes a first to codeword and a second codeword, and
wherein the jamming signal generator is configured to generate the pseudo jamming signal by multiplying the 1-1 conversion signal by the first codeword and multiplying the 1-2 conversion signal by the second codeword.

15. A communication system comprising the apparatus of claim 8 , wherein the system further comprises:
a receiver configured to separate the first communication signal from a received mixed signal using independent component analysis (ICA).

16. A non-transitory computer-readable storage medium including computer executable instructions, wherein the instructions, when executed by a processor, cause the processor to perform a method for generating a jamming signal, the method comprising:
obtaining at least one codeword matched previously to binary bits by converting the binary bits of a first communication signal to be transmitted to the at least one codeword;
generating a second communication signal by superimposing a first conversion signal obtained by converting the first communication signal to an up-chirp signal and a second conversion signal obtained by converting the first communication signal to a down-chirp signal; and
generating a pseudo jamming signal based on the second communication signal and the at least one codeword.

Assignees

• Agency Defense Dev
• Foundation Soongsil Univ Industry Cooperation

Inventors

• Kim Taehoon
• Shin Yoan
• Kim Beong Sung
• Kim Kwansoo

Classifications

• H04K3/42 Primary

  characterized by the control of the jamming frequency or wavelength · CPC title

• H04K3/46 Primary

  characterized in that the jamming signal is produced by retransmitting a received signal, after delay or processing · CPC title

• H04K3/827

  using characteristics of target signal or of transmission (as countermeasure against jamming H04K3/25), e.g. using direct sequence spread spectrum or fast frequency hopping (spread spectrum techniques H04B1/69) · CPC title

• H04K3/28

  with jamming and anti-jamming mechanisms both included in a same device or system, e.g. wherein anti-jamming includes prevention of undesired self-jamming resulting from jamming · CPC title

• H04K1/04

  by frequency scrambling, i.e. by transposing or inverting parts of the frequency band or by inverting the whole band · CPC title