The invention provides a multi-antenna base station transmission method and device independent of pilot frequency for solving a problem in the prior art that an increase in channel capacity is suppressed seriously because a required pilot and feedback overhead become unacceptable due to a substantial increase in the number of base station antennas The pilot-independent multi-antenna base station transmission method comprises the following steps of: pre-defining a pre-coding vector set V = [v1, v2,  vN] consisting of N pre-coding vectors; broadcasting all the pre-coding vectors in the pre-coding vector set V to all users one by one; and S103: calculating S scheduled users k1, k2  ks according to bits {a11,  akn,  aKN} fed back by all the users, enabling the system to allocate the pre-coding vectors vk1, vk2,, Vks to the S scheduled users respectively, and enabling the system to use the pre-coding vectors vk1, vk2, Vks to serve the S users simultaneously and respectively The method and device do not depend on pilot, can be used as a transmission scheme of a large-scale multi-antenna system in a frequency division duplex mode, and significantly reduce the huge overhead required by the estimation and feedback of channel state information at a transmitting end in a traditional scheme

Multi-antenna base station transmission method and device independent of pilot frequency

A method for selecting safe transmission of one-way full-duplex MIMO relay antenna is disclosed. The full-dual MIMO relay system comprises a source, a relay, a destination node and an eavesdropper. The source, the relay, the destination node and the eavesdropper are configured with multiple antennas. The transmission of information is completed in one time slot, comprising the following steps: acquiring the number of transmitting antennas of the source and the number of receiving antennas of the relay; obtaining the number of transmit antennas for the relay; based on the number of transmittingantennas of the source, the number of receiving antennas of the relay and the number of transmitting antennas of the relay, obtaining the reception signal-to-noise ratio of the destination and the reception signal-to-interference-noise ratio of the eavesdropper; obtaining the instantaneous safety capacity of the full-duplex MIMO relay system based on the received signal-to-noise ratio of the destination and the received signal-to-interference-noise ratio of the eavesdropper. By selecting the optimal transmitting and receiving antennas, the method of the invention not only optimizes the signal-to-noise ratio of the relay reception, but also takes into account the weakening of the signal-to-interference-to-noise ratio of the eavesdropper reception, thereby effectively improving the safety capacity of the whole system.

A method for selecting secure transmission of unidirectional full-duplex MIMO relay antennas

The invention discloses a relay transmission method for a large-scale MIMO (Multiple input multiple output) communication system, belongs to the technical field of communications, and solves the technical problem of how to select a proper antenna for transmission. The relay transmission method for the large-scale MIMO communication system comprises the following steps: acquiring the channel status information from a first user terminal and a second user terminal to a relay node; acquiring a relay antenna corresponding to the maximum channel gain amplitude according to the channel status information; carrying out signal transmission via the acquired relay antenna. The relay transmission method is adapted to the large-scale MIMO communication system.

Relay transmission method for large-scale MIMO communication system

The invention proposes an antenna selection method for selecting work antennas of an end node from a multi-antenna communication system which is provided with a relay node and a corresponding relay node. The antenna selection method includes: estimating a channel from the end node to the relay node; acquiring the estimation of the channel from the relay node to the end node; and determining transmission and reception antenna configuration, which enables the total data transmission rate of the multi-antenna communication system to reach a maximum level, of the end node, in an iterative method based on a greedy algorithm according to the channel from the end node to the relay node obtained through the estimation and the obtained estimation of the channel from the relay node to the end node. The antenna selection method and the corresponding relay node are capable of selecting the antenna configuration of the end node, approximate to an optimal scheme, at comparatively low computation complexity.

Antenna selection method and relay node

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Antenna selection method and relay node