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IR-HARQ power distribution algorithm based on digital modulation

A technology of digital modulation and distribution algorithm, applied in power management, digital transmission system, using return channel for error prevention/detection, etc., to achieve the effect of optimal data throughput rate

Active Publication Date: 2021-01-12
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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  • IR-HARQ power distribution algorithm based on digital modulation
  • IR-HARQ power distribution algorithm based on digital modulation
  • IR-HARQ power distribution algorithm based on digital modulation

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Embodiment Construction

[0041] The technical solutions of the present invention will be described below in conjunction with the accompanying drawings and embodiments.

[0042] A kind of IR-HARQ power allocation algorithm based on digital modulation, specifically comprises the following steps:

[0043] Step S1, calculating the mutual information in the IR-HARQ link based on digital modulation;

[0044] Step S2, calculating the average throughput rate in the link;

[0045] Step S3, performing power allocation using a hybrid transmission strategy.

[0046] Specifically, the step S1 includes:

[0047] Step S1.1, establish a system model, assuming that at the kth transmission, the discrete signal at the receiving end is:

[0048] the y k =g k h k x k +w k ,

[0049] 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;

[0050] Step...

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Abstract

The invention relates to the technical field of mobile communication, and in particular, relates to an IR-HARQ power distribution algorithm based on digital modulation, wherein the algorithm compriseschannel mutual information calculation based on digital modulation, a maximum modulation mutual information strategy, an approximate expression of MMSE, a hybrid transmission strategy, a threshold value of the hybrid transmission strategy and the like. Under the condition that the channel state information fed back by a transmitting end is known, the MMSE and the approximate expression thereof inthe IR-HARQ link based on convex optimization and digital modulation are utilized, the mixed transmission strategy combining the maximum modulation mutual information strategy and the inverse channeltransmission strategy is adopted, the threshold value is set to adjust power distribution in a self-adaptive mode, the average data throughput rate of the link is optimized, and the upper limit of the rate of digital modulation can be quickly approached within limited transmission times, so that the good data throughput rate is obtained.

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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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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