Power distribution method of channel sharing for large-scale users in uncertainty condition of channel

An uncertainty and allocation method technology, applied in power management, wireless communication, electrical components, etc., can solve problems such as unknown channel state information, achieve maximum throughput, ensure service quality, and optimize transmit power

Active Publication Date: 2017-07-11
PLA UNIV OF SCI & TECH
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Problems solved by technology

[0005] However, there are some challenges in the practical application of this power allocation method for large-scale user-shared channels under the condition of channel uncertainty: (1) In cognitive radio networks, the primary user will be interfered by the signal transmitted by the secondary user, while The channel state information between the receiver of the primary user and the transmit

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  • Power distribution method of channel sharing for large-scale users in uncertainty condition of channel
  • Power distribution method of channel sharing for large-scale users in uncertainty condition of channel
  • Power distribution method of channel sharing for large-scale users in uncertainty condition of channel

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[0113] Example

[0114] A specific embodiment of the present invention is described below, and the system simulation uses Matlab software. The following embodiments examine the effectiveness of the method of power allocation for large-scale user shared channels under the condition of channel uncertainty of the present invention.

[0115] In this embodiment, the simulation results are obtained through 1000 independent experiments. The scenarios are both a primary user and a large-scale secondary user cognitive network. It is assumed that the center frequency f of the transmitted signal is 700MHz, and the noise power It is -130dBm, the path loss index α=4, the antenna height of the secondary user transmitter and receiver l T , L R Both are 2m, the maximum transmission power of the secondary user transmitter p max 25dBm, the interference threshold I of the secondary user and the primary user max , They are -120dBm respectively.

[0116] Such as image 3 As shown, consider a water in...

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Abstract

The invention provides a power distribution method of channel sharing for large-scale users in an uncertainty condition of a channel. The method includes: calculating the link loss between secondary users; calculating the mutual interference between the secondary users and the sum of the throughputs of all the secondary users; calculating the optimal emission power in each secondary user link in accordance with the secondary user peak value power constraint and the interference constraint between the secondary users; and substituting the optimal emission power into a primary user constraint condition for verification, determining the fact that the optimal emission power is the most reasonable emission power if the interference constraint condition of a primary user is satisfied, otherwise, reducing the optimal emission power for one step, and re-substituting the optimal emission power into the primary user constraint condition for verification until the most reasonable emission power is found. According to the method, in the uncertainty condition of the channel, the power distribution method for maximizing the total throughput of the secondary users can be searched.

Description

technical field [0001] The invention relates to the cognitive radio field of wireless communication technology, in particular to a method for power allocation of a large-scale user shared channel under the condition of channel uncertainty. Background technique [0002] With the increasing demand for free communication between people, wireless personal communication is more and more widely used to exchange personal information, which makes a sharp contradiction between the increasing demand for high-speed wireless data and the increasing shortage of wireless spectrum resources. A basic contradiction prompts the rapid development of wireless communication technology. As a key technology to solve this contradiction, cognitive radio has broad prospects. Cognitive radio is to make full use of the licensed frequency band by allowing unlicensed users to opportunistically use the spectrum resources of licensed users without affecting the normal communication of licensed users. Usi...

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Application Information

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IPC IPC(8): H04W52/24H04W52/26H04W52/34
CPCH04W52/242H04W52/243H04W52/247H04W52/265H04W52/346
Inventor 任国春陈瑾王乐丁国如王海超薛震王茜茜
Owner PLA UNIV OF SCI & TECH
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