Optimal Power Allocation Strategy in a Joint Bistatic Radar and Communication System Based on Low Probability of...

Area of Science:

• Electrical Engineering
• Signal Processing
• Information Theory

Background:

• Joint bistatic radar and communication systems offer simultaneous radar and communication functionalities.
• Low Probability of Intercept (LPI) is crucial for covert operations in these integrated systems.
• Challenges exist in power allocation due to differing performance metrics for radar and communication.

Purpose of the Study:

• To develop an optimal power allocation strategy for a joint bistatic radar and communication system.
• To minimize total transmission power while satisfying radar and communication constraints.
• To enhance the LPI performance of the integrated system.

Main Methods:

• Derivation of closed-form expressions for probability of false alarm.
• Approximation of the probability of detection due to non-Gaussian signal characteristics.
• Application of a constrained optimization problem for power allocation.
• Utilizing the bisection search method to solve the optimization problem.

Main Results:

• An analytically closed-form expression for the probability of false alarm was calculated.
• The probability of detection was approximated under specific signal conditions.
• Numerical simulations demonstrated the impact of system parameters on power allocation.
• The proposed scheme markedly improved LPI performance.

Conclusions:

• The developed LPI-based optimal power allocation strategy effectively balances radar and communication requirements.
• The bisection search method provides an efficient solution for the constrained optimization problem.
• The joint system's LPI performance is significantly enhanced through the proposed power allocation scheme.