Abstract: The disclosure provides an optical waveguide assembly. The optical waveguide assembly includes: optical waveguide plates, where there are a plurality of optical waveguide plates, the plurality of optical waveguide plates are provided in an overlaid manner, each optical waveguide plate is provided with an in-coupling structure, a turning structure, an out-coupling structure and a diffraction inhibition layer, the turning structure and the out-coupling structure on the same optical waveguide plate are located on two side surfaces of the optical waveguide plate respectively, projections of the turning structure and the out-coupling structure on the optical waveguide plate are at least partially overlapped, and the diffraction inhibition layer is located between the out-coupling structure and the optical waveguide plate. Each turning structure includes a plurality of cellular elements. The disclosure solves a problem of non-uniform display efficiency of an optical waveguide assembly in the related art.

Abstract: Methods, apparatus and systems for wireless sensing using multiple groups of wireless devices are described. In one example, a described system comprises: heterogeneous wireless devices in a venue, and a processor. A particular device is configured to communicate with a first device through a first wireless channel based on a first protocol using a first radio, and configured to communicate with a second device through a second wireless channel based on a second protocol using a second radio. The processor is configured for: obtaining a time series of channel information (TSCI) of the second wireless channel based on a wireless signal communicated between the particular device and the second device; computing a pairwise sensing analytics based on the TSCI; and computing a combined sensing analytics based on the pairwise sensing analytics. The particular device transmits the combined sensing analytics to the first device, to perform a wireless sensing task.