Calterah Semiconductor Technology (Shanghai) Co., Ltd.

A data compression method, apparatus, a data decompression method and apparatus are provided. In the methods an apparatuses, on the basis of an average effective bit value of data in a data block and an average storage bit width occupied by e remaining part of each item of data in the compressed data block, compression of a fixed compression rate is implemented on the remaining part of the data, reducing the storage space occupied by the remaining part of the data whilst allowing for quick restoration of the compressed data into the original data.

The disclosed is a target detection method, including: dividing a Doppler spectrum into N sub-bands, extracting energies of N signals from the Doppler spectrum; among the N signals, traversing position orders of signals corresponding to multiple transmission antennas; based on a respective total energy of the signals corresponding to the multiple transmission antennas under each position order, determining sub-bands to which the signals corresponding to the multiple transmission antenna belong. By traversing position orders of the signals of the multiple transmission antennas, a position order corresponding to a maximum total energy can be used to determine positions of the signals of the multiple transmission antennas in the sub-bands, ensuring the accuracy of the channel separation of each transmission antenna and thereby increasing target detection accuracy. Further disclosed are a signal processing method, a computer-readable storage medium, an integrated circuit, a radio device, and a terminal device.

A UWB communication method, UWB device, and medium, wherein the method includes: determining a target preamble from a plurality of preset preambles based on status information of detected preambles in a current environment; the status information is used to mark an occupied condition of the detected preamble; and performing UWB communication using the target preamble to reduce a probability that the target preamble is interfered.

A calibration circuit and a calibration method for a phase shifter, a phase-shift circuit, a radio frequency transmitting circuit, a radio frequency receiving circuit, a radar sensor and an electronic device are provided. The calibration circuit for the phase shifter includes a phase acquisition circuit and a phase calibration circuit, the phase acquisition circuit coupled to the phase shifter is configured to modulate a radio frequency sample signal acquired from the phase shifter using a first baseband signal, down-convert the modulation signal to obtain a second baseband signal containing an actual phase; the phase calibration circuit coupled to the phase acquisition circuit is configured to acquire the actual phase in the second baseband signal, determine calibration phase information according to a phase deviation between the actual phase and a preset phase-shift phase, generate a phase-shift control signal according to calibration phase information and transmit it to the phase shifter.

The embodiments of the present disclosure disclose a method, a device, and a system for UWB communication. The UWB communication method includes: sending a ranging start frame to a plurality of second devices; receiving response frames from the plurality of second devices in a plurality of response time slots; sending a ranging end frame to the plurality of second devices; where each of the second devices maintains at least two sessions with the first device. The embodiments of the present disclosure optimize UWB ranging interactions under a plurality of sessions.

Embodiments of the present disclosure disclose a phase-locked loop, a radar system and a method for randomizing initial phases of FMCW signals. The phase-locked loop includes a phase-locked loop circuit and a random control signal generator. In response to a clock signal indicating a respective target moment of one or more target moments, the random control signal generator inputs a random control signal to the phase-locked loop circuit, so that the accumulated value of the plurality of fractional frequency division values is converted into a random value, and that a plurality of phase differences respectively corresponding to the plurality of chirp signals form a non-arithmetic sequence.

A UWB ranging method, apparatus and system. The UWB ranging method comprises: a UWB apparatus receiving a ranging termination information frame in a ranging report slot, which is used for receiving the ranging termination information frame, within one ranging round; when the UWB apparatus determines that the ranging termination information frame has been received, the UWB apparatus forwarding the ranging termination information frame subsequent to the ranging report slot; and when the UWB apparatus determines that the ranging termination information frame has not been received, the UWB apparatus receiving the ranging termination information frame subsequent to the ranging report slot.

The embodiments of the present disclosure relate to the technical field of target detection, and provide a target detection method, a point cloud output method, an integrated circuit, a sensor and a terminal device. The target detection method includes: acquiring first data, generating second data according to the plurality of pieces of the first data, detecting a first target according to the first data, and detecting a second target according to the second data, which beneficial to improving the accuracy of radar target detection.

The present disclosure provides an antenna in package, a RF chip, a test device and a test method. The antenna in package includes at least one antenna, one or more coupling structures and at least one testing terminal. The at least one antenna, the one or more coupling structures and the at least one testing terminal are disposed in a package body. The one or more coupling structures are coupled to one or more radiation units of the at least one antenna, and each coupling structure of the one or more coupling structures is coupled to a respective testing terminal of the at least one testing terminal. The one or more coupling structures are configured to transmit RF test signals of a RF link in which the one or more radiation units are disposed during testing the RF link.

A delay calibration circuit and method, an analog-to-digital converter, a radar sensor, and a device are provided. The delay calibration circuit monitors a timing relationship between signals in a chip in real time to extract PVT information, dynamically adjusts conversion timing of an asynchronous SAR ADC, maximally utilizes an available conversion time in each cycle of the asynchronous SAR ADC, improves the robustness of the asynchronous SAR ADC, and does not affect the normal operation of the asynchronous SAR ADC.