Development Of GPRS Signal Amplifier

Abdul Rani, Mohamad Hakim (2017) Development Of GPRS Signal Amplifier. Project Report. UTeM, Melaka, Malaysia. (Submitted)

Text (24 Pages) Development Of GPRS Signal Amplifier.pdf - Submitted Version Download (1MB)

Abstract

Mobile cellphones have become the most used device in the world due to its mobility and ease of use. This is due to the wireless network that connects each mobile phone to a network and provides quick access to voice communication and internet. However, the mobile phone can only be as good as the signal it receives. In this day and age where almost every needs to remain connected, having poor signal is a very big problem. Most of the market-available solutions are quite expensive, ranging hundreds to thousands of Ringgit but tend to bulky and fixes into place. Hence, the intent of this project is to study on General Packet Radio Service (GPRS) and signal amplification with the aim of designing a low cost and mobile GPRS signal amplification device. In addition, this project aims to investigate the overall GPRS signal coverage of Factory 1 in the Technology Campus of UTeM. The major finding of the research is that, GPRS uses the 800 and 900 MHz band to communicate the signals for both the cellular network as well as the cell phone. Each band covers two different ranges of frequency. The 800 MHz band was used in this project as most service providers in Malaysia use the 800 MHz band to send GSM, GPRS and EDGE signals. A circuit of amplifiers using the LM386 were used to amplify the signals that were received by GSM antennas and would then be sent to the other antenna. The analysis on the coverage of Factory shows a very low signal strength, on average the signal is at around -80 to -90 dBm. The signal is only capable of amplifying the signals by 3-5 dB due to the limitation of the amplifiers at high frequency. To conclude, the prototype was able to function and the research information as the information derived would be helpful to next researcher for improving this project in the near future. It is recommended that the next implement better amplifiers, use a duplexer to better make use of antennas and use a more complex power supply such as lithium ion battery.

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