Power Allocation Scheme for Device-Free Localization in 6G ISAC Networks

Abstract

Integrated Sensing and Communication (ISAC) is considered one of the crucial technologies in the upcoming sixth-generation (6G) mobile communication systems that could facilitate ultra-precise positioning of passive and active targets and extremely high data rates through spectrum coexistence and hardware sharing. Such an ISAC network offers a lot of benefits, but comes with the challenge of managing the mutual interference between the sensing and communication services. In this paper, we investigate the problem of localization accuracy in a monostatic ISAC network under consideration of inter-BS interference due to communication signal and sensing echoes, and self-interference at the respective BS. We propose a power allocation algorithm that minimizes BS's maximum range estimate error while considering minimum communication signal-to-interference-plus-noise ratio (SINR) and total power constraint. Our numerical results demonstrate the effectiveness of the proposed algorithm and indicate that it can enhance the sensing performance when the self-interference is effectively suppressed.

Authors 3

1. Maximiliano Rivera Figueroa Aachen

   RWTH Aachen University

   Affiliation as printed

   RWTH Aachen University,Mobile Communications and Computing,Aachen,Germany

2. Pradyumna Kumar Bishoyi Aachen

   RWTH Aachen University

   Affiliation as printed

   RWTH Aachen University,Mobile Communications and Computing,Aachen,Germany

3. Marina Petrova Aachen

   RWTH Aachen University

   Affiliation as printed

   RWTH Aachen University,Mobile Communications and Computing,Aachen,Germany