Joint power allocation method based on perception and iterative search

Abstract

The invention discloses a joint power allocation algorithm based on perception and iterative search and used for a full duplex AF cognitive relay system, and the joint power allocation algorithm aims to the situation that in practical application, no cooperation exists between a main network and a cognitive network, channel information is interfered and can not be acquired by the cognitive network through information interaction. According to the joint power allocation algorithm, a transmission slot is divided into a perception detection part and a data transmission part; the perception detection part comprises an independent detection sub-procedure and a joint detection sub-procedure which are executed in a pre-post mode; when independent perception detection is conducted, one part of a perception transmitting terminal and a cognitive relay remains silence and the other part continuously increases the transmission power and does not stop transmission power increasing until the other part receives an alarm signal of a master user; when joint detection is conducted, iteration increment is conducted continuously on the respective transmitting power by comparing the increase efficiency of the corresponding communication rate of the perception transmitting terminal and the increase efficiency of the corresponding communication rate of the cognitive relay in real time, and the iteration increment does not stop until the alarm signal of the master user is received. The increase efficiency of the corresponding communication rate of is low in complexity and can still keep the good and efficient communication rate.

Description

technical field [0001] The invention belongs to the technical field of mobile communication, and in particular relates to an optimization method for joint power distribution of a cognitive transmitter and a cognitive relay in a cognitive relay system. Background technique [0002] Cognitive relay can be divided into half-duplex relay and full-duplex relay because of its duplex mode. A half-duplex relay needs to receive and transmit signals on two orthogonal channels or different time slices, while a full-duplex relay receives and transmits signals simultaneously on the same spectrum resource. [0003] Although the full-duplex relay has its own self-interference problem, the existing work has proved that after sufficient physical isolation and interference cancellation (including analog signal domain and digital signal domain), the full-duplex relay can be well This makes the full-duplex relay may consume less resources than the half-duplex relay, and the spectrum utilizatio...

AI Technical Summary

Problems solved by technology

Moreover, even if the relatively stable statistical information of the instantaneous information is used as the power limit condition for power optimization processing, the cognitive network still needs to be able to obtain some system parameters about the main network: the transmission power of the transmitting node, the communication between the main network users, etc. Information such as channel statistics and quality of service parameters of the main user, but because there is no collaboration between the main network and the cognitive network, it is also very difficult to obtain these main network system parameters.

Images