Systems, devices, and methods for detecting Non-Line of Sight conditions using frequency-sweep techniques are disclosed. In an exemplary aspect, a method is disclosed. In some embodiments, the method includes estimating a first propagation time between a first device and a second device using a first signal communicated at a first carrier frequency. The method may further include estimating a second propagation time between the first device and the second device using a second signal communicated at a second carrier frequency, wherein the second carrier frequency is different than the first carrier frequency. The method may further include determining whether a Non-Line of Sight (NLOS) condition exists between the first device and the second device based on the first propagation time and the second propagation time.

An information transmission method and an apparatus pertaining to wireless communication technologies is applicable to an ultra-wideband UWB-based wireless personal area network system that supports 802.15 series protocols, such as an 802.15.4a protocol, an 802.15.4z protocol and an 802.15.4ab protocol. Disclosed embodiments may be further applied to a wireless local area network system that supports 802.11 series protocols such as a next-generation Wi-Fi protocol of IEEE 802.11ax such as 802.11be or EHT, and a next-generation protocol of 802.11be such as Wi-Fi 8, a sensing system or the like. In the method, when sending a measurement result to a first communication apparatus, a second communication apparatus may indicate a type of the measurement result to the first communication apparatus.

A semiconductor device can enhance ranging accuracy while satisfying communication standards. The baseband circuit BBC, during transmission, divides the original pulse signal into multiple divided pulse signals so that each frequency bandwidth falls within the frequency bandwidth range specified by the UWB communication standard and overlaps a common frequency range, and sequentially transmits them to the receiving terminal via the analog front-end circuit AFE at a predetermined transmission interval. On the other hand, the baseband circuit BBC, during reception, inputs multiple divided pulse signals sequentially received with a predetermined time difference, corrects the time difference as if they were received simultaneously, and further corrects the phase of the multiple divided pulse signals to be continuous in the common frequency range. Then, the baseband circuit BBC restores the original pulse signal by synthesizing the corrected multiple divided pulse signals.

In accordance with a first aspect of the present disclosure, an ultra-wideband (UWB) communication device is provided, comprising: a transmitting unit configured to initiate a device detection session by transmitting a pre-discovery message and to transmit, during the device detection session, at least one discovery message in order to discover one or more external devices; a receiving unit configured to receive, during the device detection session, one or more responses to the discovery message, wherein the responses have been transmitted by the external devices. In accordance with a second aspect of the present disclosure, a corresponding method of operating a UWB communication device is conceived.