Patents
Literature
Patsnap Copilot is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Patsnap Copilot

4875results about How to "Improve transmission performance" patented technology

Resource allocation method and resource allocation system for uplink demodulation reference signals (DMRSs)

The invention discloses a resource allocation method and a resource allocation system for uplink demodulation reference signals (DMRSs). The method comprises the following steps: a base station allocates N resources or N parameter sets which are used for sending the uplink DMRSs for a user terminal through high-level signaling, and indicates that one of the N resources or one of the N parameter sets is used for the user terminal to send the uplink DMRSs through K bits in downlink control information; and the user terminal sends the uplink DMRSs by using a source or a parameter set indicated by the K bits, wherein both N and K are positive integers. The scheme saves the consumption of singling and dynamically allocates the resources or the parameter sets for the DMRSs for UE (User Equipment) among cells, so that the orthogonality of the DMRSs of the UE among different cells can be realized, the scheduling restrictions are overcome, the multiplexing capacity of the DMRSs is strengthened, and the problems in related technologies that the orthogonality of the DMRSs of the UE among the different cells cannot be realized, the scheduling restrictions exist, the multiplexing capacity of the DMRSs is insufficient are solved, thereby improving the transmission performance of a system.
Owner:ZTE CORP

Coder based on repeated coding and channel polarization and coding/decoding method thereof

The invention discloses a coder based on repeated coding and channel polarization and a coding/decoding method thereof. The coder comprises two coding modules with the same structure; each coding module is provided with a repeated coder group, a bit position mapper with the length of N and a channel polarization device with the length of N, wherein the repeated coder group has m*L output ports and is composed of L sequentially-arranged repeated coders with the repeating times of m; and the two coding modules are connected together through a coding mode selector between the repeated coder and the bit position mapper. The invention provides a concrete method of embedding repeated codes in the channel polarization process to perform channel coding and decoding based on the coder; and compared with the polarization code of the limited length in the prior art, the coding/decoding method disclosed by the invention has stronger error correction capability and obviously improves the transmission performance on the premise of rarely increasing the decoding complexity, is particularly suitable for the practical engineering systems of mobile communication, satellite communication, underwatercommunication and the like, and has good popularization and application prospects.
Owner:BEIJING UNIV OF POSTS & TELECOMM

Antenna mapping in a MIMO wireless communication system

A method for transmission is provided to generate a plurality of reference signals for a plurality of antenna ports, with each reference signal corresponding to an antenna port; to map the plurality of reference signals to a plurality of physical antennas in accordance with a selected antenna port mapping scheme, with each reference signal corresponding to a physical antenna, and the plurality of physical antennas being aligned sequentially with equal spacing between two immediately adjacent physical antennas; to demultiplex information to be transmitted into a plurality of stream blocks; to insert a respective cyclic redundancy check to each of the stream blocks; to encode each of the stream blocks according to a corresponding coding scheme; to modulate each of the stream blocks according to a corresponding modulation scheme; to demultiplex the stream blocks to generate a plurality of sets of symbols, with each stream block being demultiplexed into a set of symbols; to map the plurality of sets of symbols into the plurality of antenna ports in accordance with a selected symbol mapping scheme; and to transmit the plurality of sets of symbols via the corresponding antenna ports, with each set of symbols being transmitted via a subset of antenna ports, with, within each subset of antenna ports, the distance between the physical antennas of the corresponding antenna ports being larger than the average distance among the plurality of physical antennas.
Owner:SAMSUNG ELECTRONICS CO LTD

Aircraft broadband wireless system and methods

A broadband wireless system includes a plurality of spaced-apart ground stations for transmitting and receiving signals to and from a respective plurality of aircraft. Each of the plurality of ground stations may include a ground station transceiver including a ground station antenna carried by a mechanically steered platform, a ground station router in communication with the ground station transceiver, and a ground station beacon transceiver in communication with the ground station router. An aircraft transceiver may be carried by each of the plurality of aircraft to be positioned in communication with one of the plurality of ground stations. The aircraft transceiver may include an aircraft antenna mounted to the aircraft, an aircraft transceiver carried by the aircraft and in communication with the aircraft antenna, and an aircraft radio transceiver carried by the aircraft and in communication with the aircraft beacon transceiver. The broadband wireless system may also include a network operations center in communication with each of the ground stations via a global communications network. A ground station transceiver may transmit signals to and receives signals from not more than one aircraft at a time and ground station antenna may track the aircraft with which it is in communication.
Owner:THE BROWN FAMILY TRUST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products