The present invention relates to a method and apparatus for detecting the type of signal propagation, the method comprising: calculating a plurality of similarity values when a location base station in an ultra-wideband location system currently receives a pulse response from a location tag, wherein each of the similarity values represents the degree of similarity between the currently received pulse response and one of a plurality of reference pulse responses, and the plurality of reference pulse responses are pulse responses from at least one location tag that were previously received by the location base station where the type of signal propagation between the location base station and the at least one location tag is a specific type of signal propagation; and determining, based on the plurality of similarity values, a current type of signal propagation between the location base station and the location tag. The method and apparatus can be used to detect the type of signal propagation between the location base station and the location tag in the UWB location system.

A wireless transmit/receive unit (WTRU) may be comprised of a processor and memory. The WTRU may receive a configuration from a network that configures the WTRU to perform an inverse deep learning model. The WTRU may receive a plurality of reference signals from the network. The WTRU may determine a number of MPCs using the inverse deep learning model and based on the plurality of reference signals. The WTRU may determine an angle of arrival (AoA), an angle of departure (AoD), and a gain associated with each MPC of the number of MPC's using the inverse deep learning model and based on the plurality of reference signals. The WTRU may send an indication of the number of MPCs and the AoA, the AoD, and the gain associated with each MPC of the number of MPCs to the network.

A transmission method and apparatus, a device, and a readable storage medium are disclosed. The method includes: sending, by a terminal, information for determining a position of a valid orthogonal basis and a coefficient of the valid orthogonal basis to a network side.

A transmission method and apparatus, a device, and a readable storage medium are disclosed. The method includes: sending, by a terminal, information for determining a position of a valid orthogonal basis and a coefficient of the valid orthogonal basis to a network side; wherein the information for determining the position of the valid orthogonal basis comprises at most two of spatial domain orthogonal basis, bitmap, or delay position. The method further comprises: receiving, by the terminal, first indication information that indicates the terminal not to send the spatial domain orthogonal basis and the delay position; sending the information for determining the position of the valid orthogonal basis to the network side comprises: sending the information for determining the position of the valid orthogonal basis to the network side, wherein the information does not comprise the bitmap, the delay position, and the spatial domain orthogonal basis.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a responding device may receive a signal from an initiating device. The responding device may estimate, from the signal, a channel impulse response (CIR) that represents signal reflections from one or more objects as multiple taps. The responding device may select one or more taps, from the multiple taps, that are within a first time window that starts at a first offset from a reference point and that has a first specified time duration. The responding device may transmit, to the initiating device, a CIR report that indicates the one or more taps. Numerous other aspects are described.