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An ir-harq power allocation algorithm based on digital modulation

A technology of digital modulation and distribution algorithm, applied in power management, digital transmission system, error prevention, etc., to achieve the effect of optimal data throughput

Active Publication Date: 2021-11-26
NANTONG UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although better performance results can also be obtained, the use of digital modulation in practical applications is unavoidable

Method used

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  • An ir-harq power allocation algorithm based on digital modulation
  • An ir-harq power allocation algorithm based on digital modulation
  • An ir-harq power allocation algorithm based on digital modulation

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Embodiment Construction

[0042] The technical solutions of the present invention will be described below in conjunction with the accompanying drawings and embodiments.

[0043] A kind of IR-HARQ power allocation algorithm based on digital modulation, specifically comprises the following steps:

[0044] Step S1, calculating the mutual information in the IR-HARQ link based on digital modulation;

[0045] Step S2, calculating the average throughput rate in the link;

[0046] Step S3, performing power allocation using a hybrid transmission strategy.

[0047] Specifically, the step S1 includes:

[0048] Step S1.1, establish a system model, assuming that at the kth transmission, the discrete signal at the receiving end is:

[0049] the y k =g k h k x k +w k ,

[0050] where x k is the transmitted signal, y k For receiving signal, w k is additive white Gaussian noise, h k is the channel gain of the current transmission round, g k is the transmit power during the kth transmission;

[0051] Step...

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Abstract

The present invention relates to the technical field of mobile communication, in particular to an IR-HARQ power allocation algorithm based on digital modulation, which includes calculation of channel mutual information based on digital modulation, strategy of maximizing modulation mutual information, approximate expression of MMSE, hybrid transmission strategy and its threshold, etc.; the present invention uses convex optimization and MMSE and its approximate expression in the IR-HARQ link based on digital modulation under the condition of the channel state information fed back by the known transmitter, and adopts the maximum modulation mutual information strategy and The hybrid transmission strategy combined with the reverse channel transmission strategy sets the threshold to adaptively adjust the power allocation, optimizes the average data throughput rate of the link, and can quickly approach the upper limit of the digital modulation rate within a limited number of transmissions, thereby obtaining better data throughput Rate.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to an IR-HARQ power allocation algorithm based on digital modulation. Background technique [0002] Hybrid Automatic Repeat reQuest (Hybrid Automatic Repeat reQuest, IR-HARQ) is a technology formed by combining Forward Error Correction Coding (FEC) and Automatic Repeat reQuest (ARQ). That is, the receiving end uses FEC technology to correct the part of all errors that can be corrected, and then judges the data packets that cannot be corrected through error detection, and finally discards the data packets that cannot be corrected, and requests the transmitter to resend the same data packet. [0003] The prior art considers ideal channel coding and optimizes the average data throughput rate in the IR-HARQ transmission link without digital modulation. Although better performance results can also be obtained, the use of digital modulation in practical applications is unavo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W52/24H04L1/18
CPCH04L1/1812H04W52/241
Inventor 季晨曹钰杰章国安
Owner NANTONG UNIVERSITY
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