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All Journal Dinamisia: Jurnal Pengabdian Kepada Masyarakat Jurnal ELTEK
Nihayatus Sa'adah
Politeknik Elektronika Negeri Surabaya
Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Social Sciences Other

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Implementasi skema pengacakan subcarrier OFDM dengan algoritma RSA pada NI-USRP Nihayatus Sa'adah; I Gede Puja Aswara; Amang Sudarsono
JURNAL ELTEK Vol 20 No 2 (2022): ELTEK Vol 20 No 2
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (536.983 KB) | DOI: 10.33795/eltek.v20i2.354

Abstract

Abstrak Keamanan jaringan nirkabel merupakan salah satu hal terpenting dalam sistem komunikasi. Karena sinyal dikirim dari pengirim melalui saluran nirkabel, tidak hanya penerima yang sah, tetapi juga penyadap dapat menangkap dan menyimpan sinyal informasi dengan mudah. Penelitian ini mengeksplorasi skema keamanan komunikasi nirkabel dimana skema yang digunakan adalah pengacakan subcarrier. Pemancar dan penerima harus disinkronkan untuk mengembalikan subcarrier ke posisi semula. Sistem ini menggunakan algoritma RSA sebagai sinkronisasi. Teknologi keamanan pengacakan subcarrier diimplementasikan pada sistem OFDM. Sistem OFDM diimplementasikan menggunakan perangkat USRP. Hasil yang diperoleh dari penelitian ini membuktikan bahwa teknik keamanan yang digunakan tidak menurunkan kinerja sistem, bahkan dapat mengurangi jumlah kesalahan bit akibat teknik sinkronisasi. Dengan teknik sinkronisasi algoritma RSA, dari jarak pengujian 1 meter, 2 meter, dan 5 meter. Pada jarak 1 meter didapatkan hasil terbaik dengan penurunan error bit dari 19,04% menjadi 0% pada 32-QAM dan penurunan error bit dari 28,57% menjadi 4,76% pada 64-QAM Abstract Wireless network security is one of the essential things in communication systems. Since the signal is sent from the sender through a wireless channel, the legitimate receiver and eavesdropper can easily capture and store signal information. This study explores a wireless communication security scheme where the scheme used is subcarrier randomization. The transmitter and receiver must be synchronized to return the subcarrier to its original position. This system uses the RSA algorithm as synchronization. Subcarrier randomization security is implemented in OFDM system. OFDM system is implemented using USRP. The results from this study prove that security techniques don't reduce system performance, and can even reduce the number of errors due to synchronization techniques with RSA synchronization technique, with 1meter, 2meters, and 5meters experiments. At 1meter distance is the best result with bit error drop from 19.04% to 0% on 32-QAM and a bit error drop from 28.57% to 4.76% on 64-QAM.
Utilization of Solar Powered Water Pump System to Support Fish Cultivation : Pemanfaatan Sistem Pompa Air Tenaga Surya untuk Pendukung Budidaya Ikan Nihayatus Sa'adah; Rahardhita Widyatra Sudibyo; Faridatun Nadziroh; Hani’ah Mahmudah; Anang Budikarso; Nur Adi Siswandari; Muhammad Milchan; Djoko Santoso; Aestatica Ratri; Ferdiaz Firmansyah; Salsabila Tasya; Ellsa Christy Maharani
Dinamisia : Jurnal Pengabdian Kepada Masyarakat Vol. 8 No. 5 (2024): Dinamisia: Jurnal Pengabdian Kepada Masyarakat
Publisher : Universitas Lancang Kuning

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31849/dinamisia.v8i5.17211

Abstract

Maintaining water quality in fish ponds is crucial in aquaculture. Fish farmers strive to increase yields by improving water circulation, temperature, and pH levels in the ponds. Poor water circulation can lead to significant pH changes and disrupt the health and growth of the fish. In some areas, farmers use electrically powered water pumps for water circulation. For a more environmentally friendly solution, innovation in water pump design is needed. The proposed appropriate technology is a solar-powered water pump, which uses solar panels as the electricity source. Test results show that the solar panel can fully charge the battery from 7:00 AM to 5:00 PM. Testing of the DS18B20 temperature sensor shows good accuracy with a maximum error of 1.47%, while the pH sensor also works quite accurately with a maximum error of 1.8%, making them suitable for monitoring water quality in fish farming.
Co-Authors Aestatica Ratri Amang Sudarsono, Amang Anang Budikarso Djoko Santoso Ellsa Christy Maharani Faridatun Nadziroh Ferdiaz Firmansyah Hani’ah Mahmudah I Gede Puja Aswara Muhammad Milchan Nur Adi Siswandari Rahardhita Widyatra Sudibyo Salsabila Tasya