6 results about "Communication reception" patented technology

Certain aspects of the present disclosure provide techniques for wireless communications. An example method includes receiving first downlink control information (DCI) indicating a first quantity of antennas for downlink communication reception, wherein the first quantity of antennas is associated with a first application timeline; receiving, after receiving the first DCI and within the first application timeline, second DCI indicating a second quantity of antennas for downlink communication reception, wherein the second quantity of antennas is associated with a second application timeline; and receiving a downlink communication using the first quantity of antennas or using the second quantity of antennas based at least in part on timing of the downlink communication relative to at least one of the first application timeline or the second application timeline.

Certain aspects of the present disclosure provide techniques for wireless communications. An example method includes receiving first downlink control information (DCI) indicating a first quantity of antennas for downlink communication reception, wherein the first quantity of antennas is associated with a first application timeline; receiving, after receiving the first DCI and within the first application timeline, second DCI indicating a second quantity of antennas for downlink communication reception, wherein the second quantity of antennas is associated with a second application timeline; and receiving a downlink communication using the first quantity of antennas or using the second quantity of antennas based at least in part on timing of the downlink communication relative to at least one of the first application timeline or the second application timeline.

The invention discloses a multi-user random access transmission method, and belongs to the technical field of wireless communication receiving. The method comprises the steps that in a set scene, a system randomly generates a switching mode to be bound with an access user in advance, and the user can perform data transmission in a specified time slot by using the switching mode. The system selects the modulation mode of the user according to the range of the number of active users, and a receiving end can realize symbol detection and decoding of any modulation mode. Compared with an existing ODMA system multi-user detection and decoding scheme, the method has the advantages that a receiving end can perform user identity recognition according to a switching mode through pre-binding of the switching mode and the user, the adaptive modulation mode enables the transmission symbol length to be reduced when the user transmits bit data with the same length, the user access density is reduced, and the decoding efficiency is improved. The ultra-sparse characteristic of the system is guaranteed, interference caused by superposition of other user information is reduced, and therefore the detection and decoding performance of a receiving end is improved, the system supports larger-scale connection, and obvious performance gain can be obtained in medium and high user areas.

The application relates to a bit synchronization performance enhancement method for a non-continuous wave communication receiving link, which comprises the following steps: performing frame synchronization on a receiving signal frame to determine the starting position of a frame header sample point; performing frequency offset estimation based on the frame header sample point, and performing frequency offset compensation on the receiving signal frame according to the estimation result; embedding a set number of redundant sample points before the starting position of the frame header sample point of the receiving signal frame after the frequency offset compensation, and performing bit synchronization on the generated signal frame to obtain a processing signal frame; and removing the bit-synchronized redundant sample points from the processing signal frame to obtain a bit-synchronized receiving signal frame. The application can effectively solve the performance loss problem caused by the bit synchronization convergence process in the non-continuous wave scene, and greatly reduces the complexity of high-throughput satellite communication receiving.

This application relates to a low-speed satellite laser communication system and method, belonging to the field of laser communication technology. The low-speed satellite laser communication system includes an optomechanical unit and an electronic unit. The transceiver module of the optomechanical unit adopts a common aperture design. A single quadrant avalanche photodiode is placed at the focal plane of the common aperture optical antenna in the receiving optical path to convert the optical signal into four electrical signals. The signal detection module of the electronic unit is connected to the quadrant avalanche photodiode to preprocess the four electrical signals, separating the position detection signal and the communication signal. The main control communication module processes the communication signal to recover data and generates tracking commands based on the position detection signal. The fast-reflecting mirror in the optomechanical unit is controlled by a fast-reflecting mirror drive module. This application achieves both communication reception and precise tracking functions simultaneously using a single QAPD detector, significantly reducing the terminal size, weight, and power consumption, making it suitable for microsatellite platforms.

The invention discloses a terminal state conversion method and device and a terminal, and the conversion method comprises the steps: converting the terminal in a first state into a second state under the condition that a first condition is satisfied; wherein the second state is an idle state, a connected state or an inactive state; the communication power consumption of the terminal in the first state is smaller than that of the terminal in the second state; according to the embodiment of the invention, the first state is introduced, the terminal can greatly reduce the power consumption of communication receiving in the first state, and through defining the first condition for triggering the terminal to be converted from the first state to the second state (i.e., the non-first state), the purpose of saving power of the terminal is achieved on the premise that the terminal is guaranteed to be reliable enough in communication quality.