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Method for controlling mine tunnel uplink multi carrier-code division multiple access (MC-CDMA) subcarrier power

A technology of MC-CDMA and subcarrier power, applied in power management, wireless communication, electrical components, etc., can solve problems such as transmission interruption, and achieve the effect of improving the utilization rate of transmission power

Inactive Publication Date: 2015-12-23
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with this scheme, when the channel gains of all subcarriers are less than the threshold value, the transmission will be interrupted
Using the subcarrier with the largest channel gain for transmission will increase the transmit power utilization while sacrificing the frequency diversity gain of the MC-CDMA system.

Method used

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  • Method for controlling mine tunnel uplink multi carrier-code division multiple access (MC-CDMA) subcarrier power
  • Method for controlling mine tunnel uplink multi carrier-code division multiple access (MC-CDMA) subcarrier power
  • Method for controlling mine tunnel uplink multi carrier-code division multiple access (MC-CDMA) subcarrier power

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Embodiment Construction

[0031] Those skilled in the art will understand that unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the word "comprising" used in the description of the present invention refers to the presence of said features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, Integers, steps, operations, elements, components, and / or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Additionally, "connected" or "coupled" as used herein may include wirelessly connected or coupled. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0032] Those skilled in the ar...

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Abstract

The invention discloses a method for controlling mine tunnel uplink time frequency coded cooperation multi carrier-code division multiple access (MC-CDMA) subcarrier power. Round robin distribution is performed on a subcarrier of an uplink time frequency coded cooperation MC-CDMA spread spectrum branch, and the subcarrier on the spread spectrum branch is eliminated according to a preset proportion by use of the signal to noise ratio corresponding to each time frequency coded cooperation MC-CDMA subcarrier fed back to the sending terminal by a receiving terminal, so that the subcarrier power control transmission is realized. A discrete subcarrier is allocated for each mine tunnel uplink time frequency coded cooperation MC-CDMA spread spectrum branch according to fixed intervals, so that the problem of low total user channel capacity caused by low transmission quality of exceptional spread spectrum branch is solved. Furthermore, the use ratio of the MC-CDMA transmitting power can be improved, time frequency coded cooperation MC-CDMA frequency diversity gain is fully used, communication reliability of the time frequency coded cooperation MC-CDMA wireless transmission system is improved, and error rate performance of the user is improved.

Description

technical field [0001] The invention belongs to the technical field of downlink wireless communication, and in particular relates to a method for controlling the power of uplink MC-CDMA subcarriers in a mine roadway. Background technique [0002] In a wireless communication system, since electromagnetic waves are transmitted through refraction, reflection and direct radiation during transmission, they will be received through several paths. This phenomenon is the multipath effect. The phases of the electromagnetic wave rays arriving from these different paths are inconsistent and time-varying, resulting in the fading state of the received signal, that is, multipath fading, which cannot be eliminated by increasing the transmission power. Compared with the ground wireless channel, the multipath fading of the mine roadway wireless channel is more serious, which affects the performance of the wireless communication system in the coal mine. [0003] Multi-carrier (MultiCarrier, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/14
CPCH04W52/146
Inventor 张琳园杨维
Owner BEIJING JIAOTONG UNIV
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