A method for joint optimization of perceived duration and resource allocation

Abstract

The invention discloses a method for joint optimization of perception duration and resource allocation, and the optimization goal is: where r is the total data rate, τ is the width of the sensing time slot, X and W are the ratio matrix of users to each frequency band and the transmission power matrix, respectively, and the constraints are that the detection and false alarm probability, the peak value and the average value of the transmission power are all limited by preset threshold. The method first decomposes the optimization problem into upper and lower sublayers; then selects the first and second interpolation points near the lower bound of the feasible region of τ, and selects the third interpolation point based on the slope of the connecting line; secondly, the derivative of the interpolation function is zero to derive the optimal τ untie Finally, the optimal solution of τ Substitute into the lower layer for optimization to get the optimal solution of X and W The speed advantage of the method of the invention is obvious and the precision can still maintain a high level.

Description

technical field [0001] The invention relates to a fast computing technology for joint optimization of perception duration and resource allocation of a cognitive radio system, and belongs to the technical field of wireless communication. Background technique [0002] A complete process of resource allocation in a cognitive radio system in an interleaved mode involves allocation of tested spectrum, configuration of sensing time slots, and configuration of access schemes (that is, the so-called wireless resource allocation, usually including channel, modulation method, and transmission power. or) multi-parameter joint optimization problem. This type of joint optimization problem is a rather complex mixed optimization problem. In addition, at each data frame period, the system must evaluate the perceived The duration and allocation scheme of radio resources are updated in real time in order to achieve the optimum of a certain performance, for example, the maximum transmission ...

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Problems solved by technology

[0004] Purpose of the invention: Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a method for joint optimization of cognitive radio system perception duration and resource allocation, which can make the mean value and variance of the calculation delay as small as possible and avoid the actual calculation The situation where the time-consuming exceeds the fixed time slot configured for the computing task (that is, the time slot for data transmission is occupied) leads to the deterioration of system performance

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