CN112953655A - Path fading correction method based on Hata open fading model - Google Patents

Path fading correction method based on Hata open fading model Download PDF

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Publication number
CN112953655A
CN112953655A CN202110225491.XA CN202110225491A CN112953655A CN 112953655 A CN112953655 A CN 112953655A CN 202110225491 A CN202110225491 A CN 202110225491A CN 112953655 A CN112953655 A CN 112953655A
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receiver
fading
open
hata
transmitter
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黄子甲
王苏乐
文明
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CETC 20 Research Institute
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/391—Modelling the propagation channel
    • H04B17/3911—Fading models or fading generators
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/0082—Monitoring; Testing using service channels; using auxiliary channels
    • H04B17/0087—Monitoring; Testing using service channels; using auxiliary channels using auxiliary channels or channel simulators
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

The invention provides a path fading correction method based on a Hata open fading model, which is characterized in that based on the Hata open fading model, a channel fading quantity is obtained by bringing interconnection configuration parameters of an electromagnetic simulation environment into the model, then the arrival power of the signal power of a transmitter-receiver is calculated based on the fading quantity, the arrival power is compared with the rated sensitivity of the receiver-receiver, and when the arrival power is smaller than the rated sensitivity of the receiver-receiver, the interconnection configuration parameters of the electromagnetic simulation environment are corrected, so that the electromagnetic simulation environment can be quickly and effectively established, the accuracy and the rationality of the electromagnetic simulation environment are effectively improved, and reference data are provided for establishing an injection type simulation environment.

Description

Path fading correction method based on Hata open fading model
Technical Field
The invention relates to a method for calculating the path fading quantity of transmission power, belonging to the relevant technical fields of mobile communication, digital signal processing and the like.
Background
In order to realize that parameters of interconnection and intercommunication configuration in an electromagnetic simulation environment can be correctly and effectively matched and accessed to parameters of a tested terminal in a laboratory, attenuation values between the terminals need to be continuously debugged, so that interconnection and intercommunication and normal communication can be realized between a transmitter and a receiver. However, the current method for debugging configuration parameters is manual, which only needs to satisfy the link, neglects the relationship between the adjustment parameters and the parameters of the tested terminal and the adjustment margin, and the adjustment margin can reflect the compatibility degree of the electromagnetic simulation environment to the equipment of the tested terminal.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a path fading correction method based on a Hata open fading model, which comprises the steps of bringing interconnection configuration parameters of an electromagnetic simulation environment into the Hata open fading model to obtain channel fading quantity, calculating the arrival power of signal power of a transmitter-receiver based on the fading quantity, comparing the arrival power with the rated sensitivity of the receiver, and correcting the interconnection configuration parameters of the electromagnetic simulation environment when the arrival power is smaller than the rated sensitivity of the receiver so that the electromagnetic simulation environment can be quickly and effectively established.
The technical scheme adopted by the invention for solving the technical problem comprises the following steps:
step 1, giving a transmission distance d between a transmitter and a receiver, wherein the heights of an antenna of the transmitter and an antenna of the receiver are hTxAnd hRxUnit m, transmission power of transmitter is PTThe rated sensitivity of the receiver is PR；
Step 2, calculating power loss PL between the sender and the receiver;
step 3, calculating the arrival power PA＝PT-PL；
Step 4, if PA≥PRIf so, the initialization parameter configuration is reasonable without correction; otherwise, turning to step 5;
step 5, calculating PΔ＝PR-PATo find the distance d to be adjustedΔ，
Figure BDA0002955744880000011
Wherein f iscCarrier frequency of the end-machine;
step 6, correcting the transmission distance to d-dΔ。
The power loss between the transmitter and the receiver
PL(d)＝69.55+26.16 log10 fc-13.82 log10 hTx-CRx
+(44.9-6.55 log10 hTx)log10 d+(18.33-4.78 log10 fc)log10 fc-40.97
Wherein the coefficient CRx＝3.2*(log10(11.75*hRx))2-4.97。
The Hata open fading model adopts a suburban open mode.
The invention has the beneficial effects that: based on a Hata open fading model, the interconnection configuration parameters of the electromagnetic simulation environment are brought into the model to obtain channel fading quantity, then the arrival power of the signal power of the transmitter-receiver is calculated based on the fading quantity, the arrival power is compared with the rated sensitivity of the receiver-receiver, and the interconnection configuration parameters of the electromagnetic simulation environment are corrected when the arrival power is smaller than the rated sensitivity of the receiver-receiver, so that the electromagnetic simulation environment can be quickly and effectively established, the accuracy and the rationality of the electromagnetic simulation environment are effectively improved, and reference data are provided for establishing the injection type simulation environment.
Drawings
FIG. 1 is a process schematic of the process of the present invention.
Detailed Description
The invention provides a path fading correction method based on a Hata open fading model. The core idea is based on a Hata open fading model, the channel fading quantity is obtained by bringing the interconnection configuration parameters of the electromagnetic simulation environment into the model, then the arrival power of the signal power of the transmitter-receiver is calculated based on the fading quantity, the arrival power is compared with the rated sensitivity of the receiver, and the interconnection configuration parameters of the electromagnetic simulation environment are corrected when the arrival power is smaller than the rated sensitivity of the receiver, so that the electromagnetic simulation environment can be quickly and effectively established.
The technical scheme of the invention comprises the following steps:
step 1: initializing, setting the transmission distance d between the transmitter and the receiver in km, the heights of the transmitter antenna and the receiver antenna are hTxAnd hRxUnit m, transmission power of transmitter is PTThe rated sensitivity of the receiver is PRThe units are dBm;
step 2: substituting initialization parameters such as transmission distance d into a Hata open path loss formula (1) to obtain power loss PL between nodes;
Figure BDA0002955744880000021
wherein f iscCarrier frequency of the end-machine, CRxAre the coefficients associated with the receive antennas and,
CRx＝3.2*(log10(11.75*hRx))2-4.97 (2)
and step 3: calculating the power of arrival PA；
PA＝PT-PL
And 4, step 4: if P isA≥PRIf so, the initialization parameter configuration is reasonable without correction; otherwise, turning to step 5;
and 5: calculating PΔ＝PR-PAThe required adjustment distance d is obtained by the following formulaΔ；
Figure BDA0002955744880000031
Step 6: correcting transmission distance d: ═ d-dΔ。
The Hata open fading model adopts a suburban open mode.
The path fading correction method based on the Hata open fading model of the present invention is further described in detail below with reference to the drawings and examples.
Referring to fig. 1, a general flow of a path fading correction method based on a Hata open fading model is described. Firstly, bringing interconnection configuration parameters of an electromagnetic simulation environment into a Hata open fading model to obtain channel fading quantity, then calculating the arrival power of signal power from a transmitter to a receiver based on the fading quantity, comparing the arrival power with the rated sensitivity of the receiver, and correcting the interconnection configuration parameters of the electromagnetic simulation environment when the arrival power is less than the rated sensitivity of the receiver.
To simplify the analysis, the channel fading calculated in the system of this example is the channel fading of the sender to the receiver, which enables the signal transmitted by the sender to be received by the receiver.
In the specific operation:
step 1: initializing, setting the transmission distance d between the transmitter and the receiver to be 1km, and setting the heights of the transmitter antenna and the receiver antenna to be hTx50m and hRx50m, the transmitting power of the transmitter is PT20dBm, rated sensitivity of receiver is PR-50dBm, end-to-end machine center frequency fc＝2MHz；
Step 2: substituting the initialization parameters into a path loss formula (1) to obtain power loss amount PL between nodes which is 76.081;
and step 3: calculating the power of arrival PA；
PA＝PT-PL＝-56.081dB
And 4, step 4: if P isA≥PRIf so, the initialization parameter configuration is reasonable without correction; otherwise, turning to step 5;
and 5: calculating PΔ＝PR-PAThe required adjustment distance d is obtained by equation (3) at 6.0871dBΔ＝；
Step 6: correcting transmission distance d: ═ d-dΔ＝1km-0.0085km＝99.9915km。
The foregoing is merely exemplary of the present invention and those skilled in the art may make various changes and modifications without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the technical solutions and equivalents thereof recited in the claims of the present invention, it is intended that the present invention also include such modifications and variations, and such modifications and variations based on the idea of the present invention still fall within the scope of the claims of the present invention.

Claims (3)

1. A path fading correction method based on a Hata open fading model is characterized by comprising the following steps:
step 1, giving a transmission distance d between a transmitter and a receiver, wherein the heights of an antenna of the transmitter and an antenna of the receiver are hTxAnd hRxUnit m, transmission power of transmitter is PTThe rated sensitivity of the receiver is PR；
Step 2, calculating power loss PL between the sender and the receiver;
step 3, calculating the arrival power PA＝PT-PL；
Step 4, if PA≥PRIf so, the initialization parameter configuration is reasonable without correction; otherwise, turning to step 5;
step 5, calculating PΔ＝PR-PATo find the distance d to be adjustedΔ，
Figure FDA0002955744870000011
Wherein f iscCarrier frequency of the end-machine;
step 6, correcting the transmission distance to d-dΔ。
2. The method of claim 1, wherein the amount of power loss between the transmitter and the receiver is determined by a Hata open fading model
PL(d)＝69.55+26.16log10fc-13.82log10hTx-CRx+(44.9-6.55log10hTx)log10d+(18.33-4.78log10fc)log10fc-40.97
Wherein the coefficient CRx＝3.2*(log10(11.75*hRx))2-4.97。
3. The method for path fading correction based on Hata open fading model as claimed in claim 1, wherein said Hata open fading model adopts suburban open mode.
CN202110225491.XA 2021-03-01 2021-03-01 Path fading correction method based on Hata open fading model Pending CN112953655A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060148429A1 (en) * 2002-12-24 2006-07-06 Matsushita Electric Industrial Co., Ltd. Transmission path simulation method and transmission path simulator
CN103607723A (en) * 2013-11-18 2014-02-26 北京交通大学 Wireless communication link estimation method facing high-speed railway linear community
CN111405586A (en) * 2020-03-19 2020-07-10 长沙航空职业技术学院 Wireless intelligent propagation method based on Cost231-Hata model

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060148429A1 (en) * 2002-12-24 2006-07-06 Matsushita Electric Industrial Co., Ltd. Transmission path simulation method and transmission path simulator
CN103607723A (en) * 2013-11-18 2014-02-26 北京交通大学 Wireless communication link estimation method facing high-speed railway linear community
CN111405586A (en) * 2020-03-19 2020-07-10 长沙航空职业技术学院 Wireless intelligent propagation method based on Cost231-Hata model

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
吴彦鸿 等: "无线通信系统中电波传播路径损耗模型研究", 《理论与方法》, 31 August 2009 (2009-08-31), pages 35 - 35 *
张新广 等: "TD-SCDMA无线链路预算的研究", 《邮电设计技术》, no. 03, 28 March 2006 (2006-03-28) *

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Application publication date: 20210611