PMID- 38136519
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20231225
IS  - 1099-4300 (Electronic)
IS  - 1099-4300 (Linking)
VI  - 25
IP  - 12
DP  - 2023 Dec 9
TI  - A Communication Anti-Jamming Scheme Assisted by RIS with Angular Response.
LID - 10.3390/e25121638 [doi]
LID - 1638
AB  - By optimizing the reconfigurable intelligent surface (RIS) reflection 
      coefficients, the channel capacity of legitimate users can be increased, thereby 
      enhancing the anti-jamming performance of communication systems. However, 
      existing studies on RIS-assisted anti-jamming assume that there is no coupling 
      between the RIS reflection coefficients and the incident angle of electromagnetic 
      (EM) waves, which is quite unreasonable. Therefore, we consider the effect of the 
      incident angle of EM waves on the reflection coefficients of the RIS and propose 
      a communication anti-jamming scheme assisted by an RIS with angular response. 
      Specifically, a problem is formulated to optimize the RIS reflection coefficients 
      so that the legitimate signal is amplified, but the jamming signal is attenuated, 
      thus enhancing the legitimate channel capacity. However, the coupling of the EM 
      incident angle and the RIS reflection coefficients causes the problem to be 
      non-convex. To tackle this problem, we equivalently transform the RIS reflection 
      coefficients optimization problem into a quadratically constrained quadratic 
      programming (QCQP) problem using the complex Taylor expansion and the 
      multidimensional complex quadratic transform (MCQT) and solve it utilizing the 
      alternating direction method of the multipliers (ADMM) algorithm. The simulation 
      results reveal that, compared to other schemes supported by RIS without angular 
      response, the proposed scheme is able to achieve a significant improvement in the 
      anti-jamming performance.
FAU - Wang, Jinpeng
AU  - Wang J
AD  - School of Cyber Science and Engineering, Zhengzhou University, Zhengzhou 450001, 
      China.
FAU - Jiang, Wenyu
AU  - Jiang W
AD  - Institute of Information Technology, PLA Strategic Support Force Information 
      Engineering University, Zhengzhou 450001, China.
FAU - Huang, Kaizhi
AU  - Huang K
AD  - Institute of Information Technology, PLA Strategic Support Force Information 
      Engineering University, Zhengzhou 450001, China.
FAU - Sun, Xiaoli
AU  - Sun X
AD  - Institute of Information Technology, PLA Strategic Support Force Information 
      Engineering University, Zhengzhou 450001, China.
LA  - eng
GR  - 2022YFB2902202/National Key Research and Development Program of China/
PT  - Journal Article
DEP - 20231209
PL  - Switzerland
TA  - Entropy (Basel)
JT  - Entropy (Basel, Switzerland)
JID - 101243874
PMC - PMC10742579
OTO - NOTNLM
OT  - angular response
OT  - anti-jamming
OT  - channel capacity
OT  - reconfigurable intelligent surface
COIS- The authors declare no conflict of interest.
EDAT- 2023/12/23 12:43
MHDA- 2023/12/23 12:44
PMCR- 2023/12/09
CRDT- 2023/12/23 01:04
PHST- 2023/09/30 00:00 [received]
PHST- 2023/12/02 00:00 [revised]
PHST- 2023/12/07 00:00 [accepted]
PHST- 2023/12/23 12:44 [medline]
PHST- 2023/12/23 12:43 [pubmed]
PHST- 2023/12/23 01:04 [entrez]
PHST- 2023/12/09 00:00 [pmc-release]
AID - e25121638 [pii]
AID - entropy-25-01638 [pii]
AID - 10.3390/e25121638 [doi]
PST - epublish
SO  - Entropy (Basel). 2023 Dec 9;25(12):1638. doi: 10.3390/e25121638.