45results about How to "Avoid self interference" patented technology

In a telecommunications network including a plurality of mobile terminals in communication with a network base station, and a plurality of relay nodes configured to assist the base station with data transmissions between the base station and one or more of said plurality of mobile terminals, a method of enabling communication resource reuse amongst the plurality of said relay nodes, the method comprising: predefining a plurality of communication resource sets, each resource set comprising one or more communication resource elements, the communication resource sets arranged so that each relay node can receive data in a predefined receiving resource set and transmit data in a predefined transmission resource set; determining which of two or more relay nodes are spatially separated from one another; and configuring at least two of the two or more spatially separated relay nodes to use the same communication resource sets.

The related wireless transfer communication method comprises: in down and up subframe of BS physical layer frame structure, setting down and up transfer areas; setting down/up transfer area on down/up subframe of BS physical layer frame structure to define and receive the transfer data time slot of BS down/up transfer area; among BS, RS and UE, using the said set BS and up-down physical layer frame of RS for wireless transfer communication by FDD way. This invention can ensure the transfer communication without interface.

The present invention discloses a method for detecting the system self-interference in the time division duplex wireless cellular communication network, which comprises the steps of: confirming the business area coverage for detecting self-interference; arranging an exclusive transmitting cell in the business area coverage, and other cells are arranged to be receiving cell; arranging a carrier frequency and synchronous measuring frame for all the cells in the business area coverage; arranging time slot in the measuring frame for the transmitting cell in the assigned carrier frequency and at the same time arranging receiving time slot in the measuring frame for all the receiving cells in the assigned carrier frequency; assigning the transmitting time slot to transmit the signal of the cell when the transmitting cell is in the assigned carrier frequency; assigning the receiving time slot in the measuring frame to receive the transmitted signal when the receiving cell is in the assigned carrier frequency; and judging whether a system self-interference generates between the transmitting cell and the receiving cell according to whether a transmitted signal is received by the receiving cell in the receiving time slot. The self-interference of the TDD system can be effectively detected with the method of the invention.

The invention discloses a correlation rotation precoding method applied to a GFDM communication system. The problem of relatively low symbol error rate transmission performance of a generalized frequency division multiplexing GFDM communication system in the prior art is mainly solved. The related rotation precoding method comprises the following specific steps: (1) constructing an autocorrelation matrix; (2) constructing a zero forcing precoding matrix; (3) constructing a correlation rotation matrix; (4) eliminating a multiplicative channel fading factor; (5) constructing a correlation rotation precoding matrix; (6) precoding; and (7) transmitting a to-be-transmitted symbol. The correlation rotation precoding method disclosed by the invention has the advantages of high symbol error rate performance, adverse effects caused by self-interference and multi-path channel interference can be simultaneously eliminated, the interference is utilized to improve the symbol error rate transmission performance of the generalized frequency division multiplexing GFDM communication system, meanwhile the precoding processing method of signals is simple and feasible, and the signal transmission requirements of users in a real environment can be satisfied in a multi-path channel scene.

The invention discloses a six-leg walking robot in parallel connection driven by rotation. The six-leg walking robot comprises a frame and six driving legs in parallel connection, wherein the six driving legs in parallel connection are uniformly distributed on the frame and symmetrically mounted, each of the driving legs in parallel connection has three freedom degrees relative to the frame, and the frame has six freedom degrees in three-dimensional translation and three-dimensional rotation under the coordination of the six driving legs in parallel connection; each of the driving legs in parallel connection comprises a driving mechanism in parallel connection and a leg mechanism, which are connected through an equivalent spherical hinge alpha, wherein the driving mechanism in parallel connection adopts a three branched hinge structure, and the leg mechanism adopts a four rod structure. The six-leg walking robot disclosed by the invention is simple and flexible in structure, light in mechanisms, stable to walk, good in adaptability and suitable for high-speed heavy-load transportation operation under non-structural topographic conditions.

The invention relates to a virtual full-duplex relay transmission method, which comprises the steps that K source terminals S1, S2, S3,..., SK send signals to a relay R1 in an odd-number time slot (2t-1), a relay R2 performs decoding and re-encoding on signals received in the previous time slot (2t-2) and then forwards the signals to K sink terminals D1, D2,..., DK, the K source terminals S1, S2, S3,..., SK send signals to the relay R2 in an even-number time slot 2t, the relay R1 performs decoding and re-encoding on signals received in the previous time slot (2t-1) and then forwards the signals to the K sink terminals D1, D2,..., DK, the relay R1 and the relay R2 take turns to receive and send signals, the K source terminals S1, S2, S3,..., SK always send signals, the K sink terminals D1, D2,..., DK, always receive signals, thereby realizing the same transmission efficiency with a full-duplex relay method. However, signals are sent and received alternately by using two general half-duplex relay in the method, so that a full-duplex self-interference phenomenon is avoided.

The invention relates to an orthogonal frequency division multiple access system and an orthogonal frequency division multiple access method for wireless relay communication. The system provided by the invention comprises a base station (BS), a relay station (RS) and a user terminal. The method mainly comprises the following steps of: setting a downlink relay zone and an uplink relay zone in a time division multiplexing (TDM) way in a downlink sub-frame and an uplink sub-frame of a physical layer frame structure of the BS respectively, setting a downlink relay zone in an uplink sub-frame of a physical layer frame structure of a frequency division duplexing (FDD) wireless receiver of the RS to define a relay sub-channel and orthogonal frequency division multiple access (OFDMA) symbol combinations for the reception of the RS from the downlink relay zone of the BS, and setting an uplink relay zone in a downlink sub-frame of a physical layer frame structure of an FDD wireless transmitter of the RS to define a relay sub-channel and OFDMA symbol combinations for the reception of the RS from the uplink relay zone of the BS; and performing the wireless relay communication among the BS, the RS and the user terminal in an FDD way based on the set uplink and downlink physical layer frames of the BS and the RS. By the system and the method, the single-FDD-wireless-transceiver-based relay communication of the RS can be realized in a communication system, the relay communication among the RS, the BS and the user terminal can be effectively ensured, and kinds of possible interference can be effectively avoided.

The related wireless transfer OFDM access method comprises: in down and up subframe of BS physical layer frame structure, employing TDM-TDM way to set down and up transfer areas; setting down/up transfer area on up/down subframe of physical layer frame structure of RSS FDD wireless receiver to define the transfer sub-channel of down/up transfer area and OFDMA label combination; among BS, RS and UE, using the said set BS and up-down physical layer frame of RS for wireless transfer communication by FDD way. This invention can ensure the transfer communication without interface.

Embodiments of the present application provide a wireless communication method and device, which can avoid self-interference of terminal devices as much as possible, and improve performance of a communication system. The method includes: the terminal device determines that the first signal and the second signal cause self-interference or have the possibility of self-interference to the terminal device, wherein the first signal is used between the terminal device and the first network device The signal transmitted by the first carrier, the second signal is a signal transmitted between the terminal device and the second network device by using the second carrier; the terminal device sends the first information to the first network device, and the The first information is used to indicate that the first signal and the second signal cause self-interference to the terminal device or have the possibility of self-interference, and indicate that the terminal device and the second network device use A situation where the second carrier performs signal transmission.

A full-duplex transmission control method, user equipment and base station. Wherein, a full-duplex transmission control method includes: the user equipment obtains a first time resource unit; if the first time resource unit is obtained from the first time resource unit and includes scheduling authorization information indicating full-duplex transmission, the user equipment according to The power offset obtained by the user equipment corrects the first uplink transmission power used for half-duplex transmission to obtain the second uplink transmission power used for the full-duplex transmission; the user equipment according to the first uplink transmission power Two uplink transmission power to transmit an uplink signal on the first time resource unit or the second time resource unit, where the second time resource unit is a time resource unit after the first time resource unit in time.