A Secure Constellation Design for Polarized Modulation in Wireless Communications

This paper presents a modulation constellation design technique for polarization modulation communication in wireless communication. Such constellation can be used for confidential polarization modulation communication on the depolarization channel. Information theory is innovatively applied to constellation design, which allows us to take the channel depolarization effects into account during the constellation design process. Specifically, we derive the security capacity of the communication system under depolarized channel conditions and use it as the objective function for secure constellation optimization. We use a heuristic genetic algorithm to solve the above optimization problem. The numerical results show that compared to the quasi-optimal geometry-based constellation, the resulting constellation can have an advantage of secure capacity and have better secure performance.