Abstract: A method is implemented in a digital unit connected with a plurality of distributed antennas including a first antenna, a second antenna and a third antenna. The method comprises: causing transmitting a first signal from the first antenna, a second signal from the second antenna, and a third signal from the third antenna in a same frequency resource; obtaining a receiver and transmitter side loop-back phase difference between the first antenna and the second antenna based on the first signal received at the third antenna, the second signal received at the third antenna, the third signal received at the first antenna, and the third signal received at the second antenna; and obtaining estimations of a time delay difference and an initial phase difference between the first and second antennas based on the obtained loop-back phase difference.

Abstract: The present disclosure relates to the field of survey and stability evaluation of a tailing fill dam, in particular to a method and system for survey and stability evaluation of an upstream tailing fill dam, wherein the method comprises the following steps: selecting a drill bit and a soil sampler for a target tailing fill dam; collecting tailing sand at different depths of the target tailing fill dam using the drill bit and the soil sampler; detecting an undisturbed soil sample of the tailing sand; setting a preset standard according to the undisturbed soil sample, and screening the tailing sand using the preset standard to obtain a tailing sand sample; detecting the particle composition of the tailing sand sample; detecting the mechanical property of the tailing sand sample; and evaluating the stability of the target tailing fill dam through the particle composition and the mechanical property.

Abstract: Disclosed are an array substrate and a driving method, a display panel and a touch display device. The array substrate includes: electrode column groups each including M adjacent electrode columns; touch signal lines each including a first signal line and a second signal line electrically connected to each other; M common voltage lines, M first switch control lines and first switch device groups; and M second switch control lines, second switch device groups and touch signal terminal groups. Each second switch device group includes M sub-switch device groups, each of which includes N second switch devices, and each touch signal terminal group includes N touch signal terminals. N touch signal terminals in the same touch signal terminal group are respectively electrically connected to the second terminals of N second switch devices in any sub-switch device group in the same second switch device group in a one-to-one manner.

Abstract: Disclosed are an array substrate and a driving method, a display panel and a touch display device. The array substrate includes: electrode column groups each including M adjacent electrode columns; touch signal lines each including a first signal line and a second signal line electrically connected to each other; M common voltage lines, M first switch control lines and first switch device groups; and M second switch control lines, second switch device groups and touch signal terminal groups. Each second switch device group includes M sub-switch device groups, each of which includes N second switch devices, and each touch signal terminal group includes N touch signal terminals. N touch signal terminals in the same touch signal terminal group are respectively electrically connected to the second terminals of N second switch devices in any sub-switch device group in the same second switch device group in a one-to-one manner.

Abstract: A method is implemented in a digital unit connected with a plurality of distributed antennas including a first antenna, a second antenna and a third antenna. The method comprises: causing transmitting a first signal from the first antenna, a second signal from the second antenna, and a third signal from the third antenna in a same frequency resource; obtaining a receiver and transmitter side loop-back phase difference between the first antenna and the second antenna based on the first signal received at the third antenna, the second signal received at the third antenna, the third signal received at the first antenna, and the third signal received at the second antenna; and obtaining estimations of a time delay difference and an initial phase difference between the first and second antennas based on the obtained loop-back phase difference.

Abstract: A method is implemented in a digital unit connected with a plurality of distributed antennas including a first antenna, a second antenna and a third antenna. The method comprises: causing transmitting a first signal from the first antenna, a second signal from the second antenna, and a third signal from the third antenna in a same frequency resource; obtaining a receiver and transmitter side loop-back phase difference between the first antenna and the second antenna based on the first signal received at the third antenna, the second signal received at the third antenna, the third signal received at the first antenna, and the third signal received at the second antenna; and obtaining estimations of a time delay difference and an initial phase difference between the first and second antennas based on the obtained loop-back phase difference.

Abstract: A method is implemented in a digital unit connected with a plurality of distributed antennas including a first antenna, a second antenna and a third antenna. The method comprises: causing transmitting a first signal from the first antenna, a second signal from the second antenna, and a third signal from the third antenna in a same frequency resource; obtaining a receiver and transmitter side loop-back phase difference between the first antenna and the second antenna based on the first signal received at the third antenna, the second signal received at the third antenna, the third signal received at the first antenna, and the third signal received at the second antenna; and obtaining estimations of a time delay difference and an initial phase difference between the first and second antennas based on the obtained loop-back phase difference.

Abstract: The embodiments disclose a method in a base station for extracting a resource block at a frequency band from a signal received from a terminal device in a radio communication system employing OFDM. The method comprising: removing a CP portion corresponding to the resource block from the signal; for each of a predetermined number of successive symbols in the signal after the CP portion corresponding to the resource block has been removed, performing a FFT of the symbol, extracting a frequency domain signal corresponding to the frequency band from the FFT of the symbol, performing an IFFT on the extracted frequency domain signal to yield a time domain signal, and storing the time domain signal to form a time sequence by concatenation; performing a FFT of the stored time sequence; and extracting subcarriers corresponding to the resource block from the FFT of the stored time sequence.

Abstract: The present disclosure provides a method and an apparatus in a radio base station for inter-transceiver antenna calibration. The method comprises collecting a first phase difference between a first signal and a first reception signal and a second phase difference between a second signal and a second reception signal. The first signal is transmitted through a reference transmission path of a first transceiver and received through a reference reception path of a second transceiver as the first reception signal. The second signal is transmitted through a reference transmission path of the second transceiver and received through a reference reception path of the first transceiver as the second reception signal. The method further comprises determining and compensating for an inter-loop phase response difference between a first reference path loop of the first transceiver and a second reference path loop of the second transceiver by subtracting the second phase difference from the first phase difference.

Abstract: The present disclosure provides a method and an apparatus in a radio base station for inter-transceiver antenna calibration. The method comprises collecting a first phase difference between a first signal and a first reception signal and a second phase difference between a second signal and a second reception signal. The first signal is transmitted through a reference transmission path of a first transceiver and received through a reference reception path of a second transceiver as the first reception signal. The second signal is transmitted through a reference transmission path of the second transceiver and received through a reference reception path of the first transceiver as the second reception signal. The method further comprises determining and compensating for an inter-loop phase response difference between a first reference path loop of the first transceiver and a second reference path loop of the second transceiver by subtracting the second phase difference from the first phase difference.

Abstract: The embodiments disclose a method in a base station for extracting a resource block at a frequency band from a signal received from a terminal device in a radio communication system employing OFDM. The method comprising: removing a CP portion corresponding to the resource block from the signal; for each of a predetermined number of successive symbols in the signal after the CP portion corresponding to the resource block has been removed, performing a FFT of the symbol, extracting a frequency domain signal corresponding to the frequency band from the FFT of the symbol, performing an IFFT on the extracted frequency domain signal to yield a time domain signal, and storing the time domain signal to form a time sequence by concatenation; performing a FFT of the stored time sequence; and extracting subcarriers corresponding to the resource block from the FFT of the stored time sequence.

Abstract: The present disclosure provides a method in a base station of a radio network for antenna calibration of a first transceiver of the base station with respect to a second transceiver. The method comprises at least one of a first group and a second group of steps. The first group of steps comprises collecting a first group of amplitude and phase differences between a first calibration signal and each of a first and a fourth reception signals and between a second calibration signal and each of a second and a third reception signals. The first group of steps further comprises estimating, based on the first group of amplitude and phase differences, a signal response characteristic difference between a calibration reception chain of the first transceiver and a calibration reception chain of the second transceiver for reference antenna reception calibration of the first transceiver with respect to the second transceiver.

Abstract: The present disclosure provides a method in a base station of a radio network for antenna calibration of a first transceiver of the base station with respect to a second transceiver. The method comprises at least one of a first group and a second group of steps. The first group of steps comprises collecting a first group of amplitude and phase differences between a first calibration signal and each of a first and a fourth reception signals and between a second calibration signal and each of a second and a third reception signals. The first group of steps further comprises estimating, based on the first group of amplitude and phase differences, a signal response characteristic difference between a calibration reception chain of the first transceiver and a calibration reception chain of the second transceiver for reference antenna reception calibration of the first transceiver with respect to the second transceiver.

Abstract: Wireless communications may benefit from a method, an arrangement, and a detector for detecting HARQ-ACK information. According to embodiments of the present invention, the method comprises extracting a HARQ-ACK symbol sequence in data transmitted from a user equipment. The method also comprises generating a plurality of candidate HARQ-ACK symbol sequences. The method further comprises calculating a degree of similarity between each of the plurality of candidate HARQ-ACK symbol sequences and the extracted HARQ-ACK symbol sequence to obtain a plurality of degrees of similarity. The method additionally comprises comparing an extremum of the plurality of degrees of similarity with a predetermined threshold. Furthermore, the method comprises determining, based upon the comparing, whether the HARQ-ACK information has been transmitted from the user equipment.

Abstract: Wireless communications may benefit from a method, an arrangement, and a detector for detecting HARQ-ACK information. According to embodiments of the present invention, the method comprises extracting a HARQ-ACK symbol sequence in data transmitted from a user equipment. The method also comprises generating a plurality of candidate HARQ-ACK symbol sequences. The method further comprises calculating a degree of similarity between each of the plurality of candidate HARQ-ACK symbol sequences and the extracted HARQ-ACK symbol sequence to obtain a plurality of degrees of similarity. The method additionally comprises comparing an extremum of the plurality of degrees of similarity with a predetermined threshold. Furthermore, the method comprises determining, based upon the comparing, whether the HARQ-ACK information has been transmitted from the user equipment.

Abstract: The invention relates to a method 20 in an antenna array system 15 for calibration of an antenna apparatus 1. The method 20 comprises: estimating 21 coarse receive delays for the receive chains 51, . . . , 5n and coarse transmit delays for the transmit chains 61, . . . , 6n; adjusting 22 a timing of the receive chains 51, . . . , 5n based on the estimated coarse receive delays so that the receive chains 51, . . . , 5n align with the maximum coarse receive delay difference and adjusting a timing of the transmit chains 61, . . . , 6n based on the estimated coarse transmit delays so that the transmit chains 61, . . . , 6n align with the maximum coarse transmit delay difference; estimating 23 a fine delay and initial phase for the receive chains 51, . . . , 5n and the transmit chains 61, . . .

Abstract: The present invention discloses a method, an apparatus and a system for calibrating antenna, wherein channel transfer functions are obtained for subcarriers on at least one antenna to be calibrated and on a reference antenna, and the obtained channel transfer function of a first subcarrier is filtered by multiplying a symmetry filter with channel transfer functions of said first carrier's neighboring subcarriers, and the filtered channel transfer function is normalized; and a signal carried by the first subcarrier on the antenna to be calibrated is multiplied with the ratio of the filtered and normalized channel transfer function of the first subcarrier on said reference antenna to the filtered and normalized channel transfer function of said first subcarrier to get compensated. This enables to perform joint compensation on a subcarrier basis and thus reduce computation complexity.