Digital assisted simulation domain interference cancellation method and device

Abstract

The invention discloses a digital assisted simulation domain interference cancellation method and device. The method comprises four steps including signal transmitting, signal feedback, signal reconstruction and signal receiving; nonlinear parameter vectors are estimated by adoption of a nonlinear extraction unit in the signal feedback step; and reconstructed digital transmission signals are calculated by adoption of a nonlinear reconstruction unit in the signal reconstruction step. The device comprises a signal transmitting loop, a signal feedback loop, a signal reconstruction loop and a signal receiving loop. By means of the method, nonlinear interference introduced by a transmitting radio-frequency channel can be effectively inhibited; nonlinear estimation and parameter adjustment can be conveniently carried out in a digital domain; estimation of a multi-path channel between the transmitting radio-frequency channel and a receiving radio-frequency channel and parameter adjustment can be conveniently carried out in the digital domain; therefore, the method can be easily expanded to other application scenes; and the robustness is relatively high.

Description

technical field [0001] The invention relates to the field of radio, in particular to a digital-assisted analog domain interference cancellation method and device. Background technique [0002] Current wireless communication systems use time division duplex or frequency division duplex methods for two-way communication. A time-division duplex system uses the same frequency but different time slots to transmit data, thereby isolating interference between uplink and downlink. A frequency division duplex system uses the same time slot but different frequencies to transmit data, thereby isolating interference between uplink and downlink. These two duplex methods sacrifice time resources and frequency resources respectively in the process of isolating the uplink and downlink, resulting in low spectrum utilization. [0003] In today's society, the demand for wireless data services is increasing day by day, but the congestion of space wireless channels is becoming more and more pr...

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Problems solved by technology

Therefore, the transmitted signal will also propagate to the receiving end, thereby forming a strong self-interference signal, blocking the receiver's analog-to-digital converter, and causing the receiver to fail to receive useful signals. The self-interference strength is far stronger than that received by the receiving end. The strength of the signal of the wireless communication device, which seriously affects the reception of the signal sent by the remote wireless device at the receiving end

Normally, this will reduce the sensitivity of the receiving end, increase the bit error rate, and lead to a decrease in communication performance; in severe cases, the receiving channel of the receiving end will be blocked, resulting in a complete loss of the receiving function, or even burning the front end of the receiver

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