Wireless relay network uplink transmission method based on blind known interference cancellation

Abstract

The invention discloses a wireless relay network uplink transmission method based on blind known interference cancellation. The wireless relay network uplink transmission method based on the blind known interference cancellation is characterized in that two users are simultaneously transmitted at a first time slot when the channel capacity between a first user and a base station is lower than transmission rate requirements and business data of a second user can be coded by the base station under the interference of sent signals of the first user, wherein the first user is located in a relay node business coverage area and the second user is located in a high-speed business coverage area, and the base station codes the second user business data and recovers second user dispatching signs from the composite signals of the two user; relay nodes can receive composite signals from the two users in a first time slot and the relay nodes amplify and transmit the composite signals in a second time slot; and the base station receives the composite signals which are transmitted by a relay in the second time slot and carries out the business data of the first user which are recovered by the blind known interference cancellation (BKIC). The wireless relay network uplink transmission method based on the blind known interference cancellation can accomplish uplink transmission of the two users in wireless relay network by only using two time slots in probability of tending to one under the condition of a higher signal to noise ratio. System spectrum efficiency is improved.

Description

technical field [0001] The invention belongs to the field of wireless communication and network technology, and in particular relates to a wireless relay network uplink transmission method based on blind known interference cancellation. Background technique [0002] Due to the pursuit of high transmission rate and high network capacity, the future mobile cellular communication system will face the problem of shortage of spectrum resources. In the long term evolution (long term evolution, LTE) specification version tenth edition (Release10, also known as LTE-Advanced), and the Institute of Electrical and Electronics Engineers (IEEE) 802.16m protocol, due to the support of wireless relay nodes and base stations Hybrid networking is used to improve the capacity at the edge of the cell or in the hotspot area, which further exacerbates the problem of scarcity of spectrum resources. Because the relay node is limited to the half-duplex characteristics of the existing wireless trans...

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Problems solved by technology

[0003] The purpose of the present invention is to propose a wireless relay network uplink transmission method based on blind known interference cancellation. By introducing BKIC processing in the base station, it is possible to schedule the same channel for relay cooperative users and non-cooperative users to share the same channel for uplink transmission in the same cell. , so as to overcome the defect of low spectral efficiency of the existing relay transmission scheme and improve the capacity of the wireless relay network

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