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Design of Experiments TERM PROJECT

Materials Can Affect a Wi-Fi Signal

By: Ms. Chanchhaya Chhorn Ms. Sujinda Takaew

Mr. Amornsak Kanoktum

Ms. Sopagna Chan

Assoc.Prof.Dr. Jirachai Buddhakulsomsiri

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Content

I. Introduction

II. Experiment Design

III. Response Data at each block

IV. Data Analysis

V. Conclusion

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I. Introduction

Wi-Fi is the common name for a type of communication that allows electronic devices to exchange data or connect to the Internet wirelessly.

While Smartphone is a very popular device that people can use both for calling and entertain through internet using 3G or Wifi.

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People use smart phone

http://www.zeendo.com/info/wp-content/uploads/2012/10/smartphone-uses.jpg

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II. Experiment Design

Factors:

Room Wall Brick Glass WoodRouter Position Outside Inside

Door Open CloseDistance 2 4 6

Time 9 12 15

Level

7

Block:

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Practical Area

Brick Wall (SIIT Room 303) Wooden Wall (Meeting Room of Faculty of Mathematics and

Statistic; Thammasat University)

Glass Wall (SIIT Residence Bangkadi

Campus)

Network Design

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Internet

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Transmitter-Receiver(Basic Position)

Figure 1: Router and Device are in room.

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Transmitter-Receiver(1st Position)

Figure 2: Router is outside of the room. Device is inside the room

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Transmitter-Receiver(2nd Position)

Figure 3: Router is inside of the room. Device is outside the room

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III. Response Data (324 Run) Ask Mr.K to send Excel Data File and input that file icon to this file

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IV. Data Analysis

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IV. Data Analysis

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IV. Data Analysis

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Fit Regression Model

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Model Assumption

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Response Optimizer Therefore, to minimize the signal transmitted from

Router, we can use condition set as optimizer below:

The most recommended result in this experiment is to select Wooden room, Put Router Inside the room, Open the Door and you can use your smart phone with distance of 2m from the Router at 9am.

CurHigh

LowD: 0.7946Optimal

Predict

d = 0.79461

Minimum-dBm Cha

y = -7.2222

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15

2

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Close

Open

Inside

Outside

Brick

WoodType Door Distance TimeRoom

Wood Inside Open 2 9