Joint communication and sensing (JCAS) is a very promising 6G technology, which attracts more research attention. Compared with communication, radar has many unique features in terms of waveform design criteria, selfinterference cancellation (SIC), aperture-dependent resolution, virtual aperture. This paper proposes novel named max-aperture slicing (MaRS) to gain large time-frequency aperture, ...

In strong line-of-sight millimeter-wave (mmWave) wireless systems, the rank-deficient channel severely hampers spatial multiplexing. To address this inherent deficiency, multiple reconfigurable-intelligent-surfaces (RISs) are introduced in study to customize channel. Utilizing RIS reshape electromagnetic waves, we theoretically show that a favorable with an arbitrary tunable rank and minimized ...

Abstract In this study, we propose a joint hybrid-precoding algorithm for multiuser multiple-input single-output downlink systems. Specifically, consider that the base station employs an energy-efficient subconnected (SC) architecture with fixed equal subarrays (FESA) (SC-FESA). Optimizing analog precoding matrix in SC-FESA is challenging due to its unique constraint structure. maximize system ...