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

A method for accessing a channel under spatial multiplexing and a station, the method including: a monitoring station detects a first radio signal of a third party station and updates local network allocation vector and/or response frame indication deferral access time; if a second radio signal of the third party station is determined to meet the spatial orthogonal condition, a channel competition accessing process is triggered, and subsequent data transmission is completed within the updated time. Under the condition that the network allocation vector or the response frame indication deferral access time is not zero, when the third party station determines that sector transmission in the transmission initiated by the station is orthogonal with own transmission space to be conducted, the third party station ignores or resets the network allocation vector or the response frame indication deferral access time, initiates competition and starts spatial orthogonal transmission within the updated network allocation vector or response frame indication deferral access time. While spatial multiplexing is realized, fairness of channel accessing between stations is ensured; thus, effectiveness of data transmission of stations is ensured.

The embodiment of the invention discloses a data communication method and device. The data communication method comprises the following steps: when a network node receives a PPDU, acquiring a BSS (Basic Service Set) identifier in the PPDU; if the BSS identifier in the PPDU is different from a first BBS identifier, and the BBS identifier in the PPDU is the same as a second BBS identifier, then judging whether the PPDU satisfies a preset spatial multiplexing condition, wherein the first BSS identifier is an identifier of a first BSS that the network node belongs to, the second BSS identifier isan identifier of an extended BSS that a target relay belongs to, and the target relay and the network node belong to the first BSS; and if the PPDU satisfies the preset spatial multiplexing condition,competing to access a channel, and communicating with stations except the target relay in the first BSS. The embodiment of the invention can solve the problem of data transmission collision during spatial multiplexing between different BSSs.

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.

The invention discloses a dual-band eight-port MIMO terminal antenna based on a radiator multiplexing technology. The dual-band eight-port MIMO terminal antenna comprises a dielectric substrate and a pair of dielectric plates perpendicular to the dielectric substrate. A metal floor is arranged on the lower surface of the dielectric substrate, a plurality of antenna pair units are arranged on the dielectric substrate, each antenna pair unit comprises a first antenna unit on the inner side wall of the dielectric substrate and a second antenna unit on the outer side wall of the dielectric substrate, each antenna pair unit comprises two antenna ports, and one antenna port is a first feeding point on the metal floor; the other antenna port is a second feeding point of the second antenna unit; and the first antenna unit is connected with a first feeding point for feeding through a feeder line and a coaxial inner core penetrating through a floor, and the second antenna unit directly feeds through a coaxial line. The antenna has the advantages that the antenna multiplexes the unit radiator, an extra decoupling structure is not needed, dual-band work is achieved, and the isolation degree between the antenna units is high, and is suitable for a 5G intelligent terminal.

The invention discloses a multi-user multi-antenna transmission method which includes that; step1, the threshold of the space correlation degree is set; the service priority of the user is determined according to the parameters of the user media access control layer; step2, the user which has the highest priority is selected as the first selected user; step3, the space correlation degree of the unselected users and the lately selected user are computed; the users whose space correlation degrees are lower than the space correlation degree threshold construct a under-selected user set; step4, the user which has the highest priority in the under-selected set is selected as the selected user; step5, the step 3 and the step 4 are repeated to finish the selection of the user; the data of the selected user is encoded and transmitted; thereby, the over-layer optimum of the multi-user multi-antenna transmission is realized; the service requirement of the user is fulfilled; meanwhile, the interference among the users is reduced.

The invention relates to an uplink MIMO space-time encoding and decoding baseband system. In a cell covered by an MIMO base station, different mobile stations are located in different spatial positions, and different signal channel parameter matrixes can be obtained. The mobile station conducts LDPC coding and radio frequency modulation to the base-band signal and then emits the base-band signal. An MIMO base station receiver conducts radio frequency demodulation to received signals, then uses channel matrix parameters from different mobile stations to the base station to conduct space demodulation to the base-band signal, and then conducts LDPC decoding to obtain restored data. The invention provides an uplink MIMO space-time encoding and decoding base-band system circuit which applies the method. The adoption of the invention enables each connection user to obtain two independent space channels, thus improving the spectrum utilization rate of a wireless communication system and simplifying the design of an MIMO mobile station transmitter.

The embodiment of the invention provides an antenna structure and electronic equipment, relates to the technical field of electronic equipment, and can enable the antenna structure to cover the same frequency band while integrating two antennas to achieve spatial multiplexing. The antenna structure comprises a signal reference ground, a first antenna and a second antenna, wherein the first antennacomprises a first radiator and a first feeder line, the first radiator is provided with a first feeding position, the first radiator is fed from the first feeding position through the first feeder line, and the first radiator is electrically connected with the signal reference ground; the second antenna comprises a second radiator and a second feeder line, the second radiator is provided with a second feeding position, the second radiator is fed from the second feeding position through the second feeder line, the second feeder line comprises a signal transmission line and a signal reference ground line, and the signal reference ground line is electrically connected with the first radiator. The antenna structure provided by the embodiment of the invention is applied to the electronic equipment.

The invention provides a depolarization measurement and compensation device based on liquid crystal light modulator. The depolarization measurement and compensation device based on the liquid crystallight modulator comprises a first lens, a second lens, a light addressing liquid crystal spatial light modulator, a polarization splitter prism, a third lens, a fourth lens, a CCD and a control computer. The depolarization measurement and compensation device based on the liquid crystal light modulator can be used in various laser amplifiers with laser energy flux less than 300 mJ/cm<2> to compensate the laser depolarization effect caused by thermal effect and unsatisfactory polarization elements. The invention is completely based on image transfer design, and can conveniently measure and compensate the depolarization effect of the laser in real time, therefore, the complex steps of dismantling optical devices in the process of conversion measurement and compensation depolarization are avoided. The depolarization measurement and compensation device based on the liquid crystal light modulator has simple structure, can compensate for any form of depolarization, avoid the complex system ofcompensating comprehensive depolarization form, and reduce the complexity of the laser system.

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 embodiments of the invention comprise a spatial multiplexing method and equipment. The spatial multiplexing method comprises: monitoring, by first equipment, for a physical header of a first message to obtain a transmission type of the first message; and determining, by the first equipment, and according to the transmission type of the first message and a transmission type of a second message to be transmitted by the first equipment, whether to transmit the second message via the first channel while second equipment is transmitting the first message via the first channel. The method disclosed in the embodiment of the invention can increase a spectrum utilization rate of a network.