Joint distribution method of multi-channel power bandwidth in cognitive radio network

Abstract

A joint distribution method of a multi-channel power bandwidth in a cognitive radio network belongs to the field of radio technology. The method comprises: 1, a secondary user transmitter end sets a transmission power limit and a bandwidth constraint; 2, the secondary user transmitter end obtains channel state information in a channel state measurement module through signaling interaction with the secondary user receiver end and estimation of historical data; 3, the secondary user transmitter end sets a soft interference constraint; 4, the secondary user transmitter end carries out joint distribution of power and bandwidth to maximize the average transmission rate in a power bandwidth decision module; 5, the secondary user transmitter end uses a parsing method to solve the optimal solution of the fixed Lagrange multiplier; and 6, whether the communication between the secondary user transmitter end and the secondary user receiver end is completed is judged; if the communication is not completed, the method returns to the step 2 and continues channel state information detection of a next relevant time; or if the communication is completed, the traversal capacity is calculated. The invention has a low complexity.

Description

technical field [0001] The invention relates to a multi-channel power bandwidth joint allocation method in a cognitive radio network, belonging to the technical field of cognitive radio. Background technique [0002] With the continuous evolution of the wireless communication field, the public's requirements for wireless communication are also increasing. The construction of smart cities and smart earth has pushed the demand for network construction to the extreme. However, the communications industry has been plagued by a mismatch between limited spectrum resources and growing spectrum demand. However, spectrum usage suffers from uneven occupancy. For example, some unlicensed frequency bands - the congestion in industrial, scientific and medical frequency bands is particularly obvious; on the contrary, for example, the UHF frequency bands that are vacant after TV analog to digital, some of which are not available for up to 85% of the time. use. It can be seen that the co...

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Problems solved by technology

[0008] The purpose of the present invention is to overcome the problem of high complexity in the existing power bandwidth joint allocation technology that relies on the real-time information of the interference channel gain and the power bandwidth joint optimization, and proposes a multi-channel power bandwidth joint allocation in a cognitive radio network method

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