Implementasi dan Evaluasi Kinerja Multi Carrier Direct Sequence Code Division Multiple Access (MC DS CDMA) Menggunakan WARP

Marzuki, Moh Ismail (2015) Implementasi dan Evaluasi Kinerja Multi Carrier Direct Sequence Code Division Multiple Access (MC DS CDMA) Menggunakan WARP. Undergraduate thesis, Institut Technology Sepuluh Nopember.

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Abstract

Kebutuhan akan komunikasi wireless yang handal sudah menjadi isu pengembangan teknologi komunikasi di era modern ini. Sistem komunikasi MC-DS-CDMA menawarkan keunggulan dalam efisiensi penggunaan spectrum frekuensi melalui prinsip multicarrier serta tingkat keamanan informasi yang baik melalui prinsip direct sequence. WARP (Wireless Open Access Research Platform) merupakan salah satu jenis dari teknologi SDR (Software Defined Radio) yang bisa diprogram untuk membuat prototype sistem komunikasi nirkabel, salah satunya untuk sistem komunikasi MC DS CDMA. Pengimplementasian sistem komunikasi MC DS CDMA dengan menggunakan perangkat WARP bertujuan untuk mengevaluasi unjuk kerja sistem komunikasi MC DS CDMA serta untuk mengetahui berapa banyak user yang mampu dilayani secara simultan pada saat downlink oleh sistem komunikasi MC DS CDMA dibandingkan terhadap SC DS CDMA. Dengan panjang kode Gold 63, hasil yang diperoleh adalah nilai BER akan semakin meningkat seiring dengan pertambahan jarak antar node. Untuk pengiriman 1 user, pada jarak 3 meter nilai untuk gain 20 adalah 0, sedangkan pada jarak 5 meter untuk gain yang sama nilai BER adalah 0,0011. Nilai BER juga berbanding terbalik dengan level daya pancar, dimana semakin besar level daya pancar maka nilai BER semakin kecil. Untuk pengiriman 1 user, pada jarak 5 meter untuk level daya pancar 10 diperoleh nilai BER 0,0125 dan untuk level daya pancar 20 diperoleh nilai BER 0,0016. Selain itu hasil yang diperoleh adalah sistem komunikasi MC DS CDMA lebih cocok diterapkan untuk komunikasi multiuser daripada SC DS CDMA dengan dibuktikan kurva BER yang masih smooth turun terhadap kenaikan gain untuk pengiriman data 20 user. Nilai BER juga sama turunnya terhadap kenaikan nilai daya pancar maupun Eb/No. ======================================================================================================= The need for reliable wireless communication has become an issue in the communication technology development in this modern era. MC-DS-CDMA as a one of communication system, offers advantages in efficiency with frequency spectrum use through multicarrier principle and a good level of information security through the principle of direct sequence. WARP (Wireless Open Access Research Platform) is one type of SDR (Software Defined Radio) technology that can be programmed to create a prototype of a wireless communication system, such as in MC DS CDMA communication system. Implementation of MC DS CDMA communication system using WARP device aimed to evaluate the performance of MC DS CDMA communication systems as well as to determine how many users are able to be served simultaneously at the time of the downlink by MC DS CDMA communication system compared to SC DS CDMA. For 63 Gold code length, the results were BER value increased along with the increased of distance between nodes. For single user transmission at a distance of 3 meters with value of gain 20 was 0, while at a distance of 5 meters with the same value of gain, the BER value was 0.0011. BER value was also inversely proportional to the PTx level, the larger the PTx level, the smaller the value of BER. For single user transmission at 5 meters distance with PTx level 10, BER values obtained was 0,0125, with PTx level 20 BER values obtained was 0.0016. The results obtained were MC DS CDMA communication system was more suitable to be applied for multiuser communication than SC DS CDMA proven with BER curve was smooth down to 20 user data transmission. BER value was similarly fell down to the increase in PTx level and Eb/ No.

Item Type: Thesis (Undergraduate)
Additional Information: RSE 621.382 028 5 Mar i
Uncontrolled Keywords: MC DS CDMA, WARP, BER,User, Eb/No
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5103.2 Wireless communication systems. Two way wireless communication
Divisions: Faculty of Industrial Technology > Electrical Engineering > (S1) Undergraduate Theses
Depositing User: Mr. Tondo Indra Nyata
Date Deposited: 28 Dec 2018 03:24
Last Modified: 28 Dec 2018 03:24
URI: http://repository.its.ac.id/id/eprint/60116

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