Power allocation method in cognition orthogonal frequency division multiple access (OFDMA) system based on proportional fairness and interference constraints

Power allocation method in cognition orthogonal frequency division multiple access (OFDMA) system based on proportional fairness and interference constraints

The invention discloses a power allocation method in a cognition orthogonal frequency division multiple access (OFDMA) system based on proportional fairness and interference constraints, comprising the following steps: firstly carrying out power allocation among cognitive users in accordance with pr...

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Hauptverfasser: YE LU, GONG BENKANG, ZHANG ZHIPENG, WANG LIANXIANG, ZHANG CHAOYANG
Format: Patent
Sprache:chi ; eng
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ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
WIRELESS COMMUNICATIONS NETWORKS
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creator YE LU
GONG BENKANG
ZHANG ZHIPENG
WANG LIANXIANG
ZHANG CHAOYANG
description The invention discloses a power allocation method in a cognition orthogonal frequency division multiple access (OFDMA) system based on proportional fairness and interference constraints, comprising the following steps: firstly carrying out power allocation among cognitive users in accordance with proportional fairness factors, total power constraints and permanent speed values; then using a quick water injection method to carry out carrier power allocation by each cognitive user; if the carrier power of each cognitive user does not exceed a power constraint value, ending an algorithm, and otherwise, modifying allocated power of a carrier exceeding the power constraint to be the power constraint value; calculating the speed of the carrier and adding the speed to the permanent speed value of the user; eliminating the carrier from the carrier set of the user; and if the carrier set of each cognitive user is a null set, ending the algorithm, otherwise, subtracting the allocated power constraint value from a total
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subjects ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
WIRELESS COMMUNICATIONS NETWORKS
title Power allocation method in cognition orthogonal frequency division multiple access (OFDMA) system based on proportional fairness and interference constraints
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