33results about How to "Realize space reuse" patented technology

The invention discloses a DLS (direct-link setup) space multiplexing method, and workstations and a control access point supporting the DLS. The method comprises the following steps: determining DLS links polled at the same time according to the number of the current idle service channels and / or information of adjacent workstations reported by the workstation; and transmitting a polling message, and indicating the DLS links polled at the same time in the polling message. The method can achieve DLC space multiplexing to simultaneously poll the plurality of DLS links, and the plurality of corresponding workstations can simultaneous carry out DLS service, thereby improving the space utilization rate of the system resources.

The invention discloses a GMI sensor probe based on a ring-shaped amorphous wire and a preparation method thereof. The GMI sensor probe comprises a amorphous wire coil which is formed by winding the ring-shaped amorphous wire, wherein the amorphous wire coil comprises an amorphous wire section with the sensitivity to magnetic fields and an amorphous wire section losing the sensitivity to magnetic fields, and a signal acquiring coil is wound around the amorphous wire section losing the sensitivity to magnetic fields; The preparation method of the GMI sensor probe comprises the following steps of winding the amorphous wire into the ring-shaped amorphous wire coil, conducting heat treatment on a defined section of the amorphous wire coil so as to enable the amorphous wire coil to form the amorphous wire section with the sensitivity to magnetic fields and the amorphous wire section losing the sensitivity to magnetic fields, and winding and forming the signal acquiring coil around the amorphous wire section losing the sensitivity to magnetic fields. A processing shortcoming that the amorphous wire is hard to weld can be overcome, amorphous wire spatial reuse is achieved, and meanwhile only a mature heat treatment process in the material processing techniques is needed while plenty of complicated and immature amorphous welding is not needed.

The invention discloses a signal transmitting and receiving method for a code division multiple access multiple-input-multiple-output (CDMA-MIMO) system by employing generalized three-dimensional complementary codes, which belongs to the field of communication and aims to solve the problems that the signal transmitting and receiving method for the existing CDMA-MIMO system is low in adaptive capacity relative to different communication environments and the resource utilization rate requirement of the system is high. The method comprises the following steps: respectively performing space-time coding and spectrum spreading based on the generalized three-dimensional complementary codes on initial data transmitted by K users; superposing and merging a data flow which corresponds to the same antenna and the same carrier, modulating the data which corresponds to the same antenna and the same carrier to the same carrier for merging and transmitting; then simultaneously receiving the signal by employing P receiving antennas, respectively performing carrier demodulation by employing M carriers after each path of signal is synthesized, and despreading and decoding based on the generalized three-dimensional complementary codes, wherein each user acquires P groups of data corresponding to the P receiving antennas; merging and judging by employing the maximum ratio merger criterion, and outputting the data. The method is used for transmitting and receiving signals.

A channel access method and a station under spatial multiplexing, including detecting the first wireless signal of a third-party station by the listening station, updating the local network allocation vector and / or response frame to indicate delayed access time; determining the third-party station's When the second wireless signal satisfies the spatial orthogonal condition, a channel contention access process is triggered, and subsequent data transmission is completed within the updated time. In the case where the network allocation vector or the response frame indicates that the delayed access time is not 0, when the third-party station determines that the sector transmission in the transmission initiated by the station is orthogonal to its own transmission space, it ignores or resets The network allocation vector or response frame indicates the delayed access time, and the competition is initiated within the updated network allocation vector or response frame to indicate the delayed access time to start spatial orthogonal transmission, which realizes space multiplexing and ensures the inter-site channel Access fairness, thus ensuring the effectiveness of site data transmission.

A first communication device that simultaneously transmits to a group of two or more second communication devices using multi-user multiple input multiple output (MU-MIMO) communication; performs beamforming training with a selected second communication device of the group of second communication devices by transmitting one or more transmit packets including one or more training units, wherein an analog beamforming training matrix and / or a digital beamforming training matrix adapted for beamforming training with the selected second communication device are applied on the one or more training units, receiving from the selected second communication device feedback in response to the transmitted transmit packets, the feedback including beamforming information determined by the selected second communication device based on the reception of the transmit packets, and determining, for use in the simultaneous transmission of data to a group of two or more second communication devices including the selected second communication device, an updated analog beamforming matrix based on the analog beamforming training matrix and the received feedback and / or an updated digital beamforming matrix based on the digital beamforming training matrix and / or the received feedback.

The invention discloses an improved dual-band Femtocell (DBF) unlicensed channel access method to realize spatial multiplexing. According to relative distance between the DBF and a WiFi AP, the method has two situations: when the DBF and the WiFi AP are visible to each other, the method is simplified into an existing method, that is, the DBF and the WiFi AP occupies an unlicensed channel at different time, and all of DBF users in a DBF schedulable coverage range carry out data transmission; and when the DBF and the WiFi AP are invisible to each other, if the WiFi AP carries out data transmission with WiFi users in the coverage overlapped range, the DBF cannot take up the unlicensed channel, and if the WiFi AP carries out data transmission with WiFi users outside the coverage overlapped range, the DBF can take up the unlicensed channel and calls DBF users outside the coverage overlapped range to carry out data transmission. Compared with an existing DBF unlicensed channel access method, the method realizes maximized utilization of unlicensed frequency band frequency spectrum resources on the basis of ensuring WiFi system performance, and improves the system performance.