Design of laser based free space communication system

مقدم أطروحة جامعية

Rashid, Muhammad Siham

الجامعة

الجامعة التكنولوجية

الكلية

-

القسم الأكاديمي

قسم العلوم التطبيقية

دولة الجامعة

العراق

الدرجة العلمية

ماجستير

تاريخ الدرجة العلمية

2004

الملخص الإنجليزي

This Project introduces the use of laser as a signal carrier in free space to connect and transfer the data between two computers by Point-To-Point Technologies (Full-Duplex Transmission) for long distances.

Each computer contains on the RS-232 Serial Port.

Transmitter unit include laser device in addition to the electronic circuits and driver circuit to operation it.

On the other hand, the receiver unit (RX) contains photodiode (PIN) as an optical detector, amplifier and RS-232 serial.

This serial port transforms the optical signal which comes from the transmitter to the electrical signals.

Each computer contains serial transceiver card, which consist of transmitter and receiver electronic circuits operation at (115 Kpbs).

The use of a free space optical transmission link has extended the distance between the connected computers in to point-to-point network.

The proposed system stand on the OSI model with three layers (1, 2, and 7).

Furthermore, remote control application software has been written by using C++ Language and CRC method to detect the error in the transmission in high quality.

A high quality Data communication link for a distance reached about to 500 m was achieved with signal to noise ratio equal to (30.1 dB), the system calculation shows that the bit error rate (BER) is (10"8 ) and the system power budget is (51.4) db.

التخصصات الرئيسية

الفيزياء

الموضوعات

• الاتصالات الضوئية

• APA
• MLA
• AMA

لغة النص

الإنجليزية

نوع البيانات

رسائل جامعية

رقم السجل

BIM-305770