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All Journal Fortech : Journal of Information Technology Jurnal AKSI (Akuntansi dan Sistem Informasi) Jurnal Inovator Jurnal Elektronika Listrik dan Teknologi Informasi Terapan Proceeding Applied Business and Engineering Conference
Idris, Mahmud
Politeknik Jambi
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Journal : Jurnal Inovator

 1 
Analisis Pengaruh Penerapan Skema Space-Time-Block-Code Alamouti pada Sistem Komunikasi MIMO-OFDM Berbasis WARP Mahmud Idris
Jurnal Inovator Vol 1 No 1 (2018): Teknologi Proses
Publisher : LPPM Politeknik Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (0.272 KB) | DOI: 10.37338/ji.v1i1.11

Abstract

MIMO-OFDM adalah gabungan teknologi smart antena (Multiple input multiple output) dan teknologi multplexing (Orthogonal frequency division multiplexing). Teknik MIMO mampu meningkatkan troughput data dan range (jangkauan) komunikasi tanpa lebar pita (bandwidth) frekuensi dan daya pancar tambahan dimana kanal paralel independen diubah dalam domen spatial. sedangkan OFDM merupakan teknik transmisi multi carrier (banyak frekuensi) yang mengefisienkan bandwidth. Dimana tiap frekuensi adalah orthogonal satu sama lain, sehingga terjadinya overlapping tidak menyebabkan interferensi, OFDM dapat mengubah kanal multipath fading frekuensi selektif menjadi kanal flat fading, space time block code (STBC) digunakan sebagai teknik pengkodean untuk mendapatkan kualitas sinyal setinggi mungkin pada pengirim dan penerima. Kenerja sistem dilihat pada pengukuran skema STBC alamouti 2x2 pada sistem MIMO-OFDM berbasis wireless open access research platform (WARP) pada kondisi lingkungan (indoor dan outdoor), Dengan asumsi skema LOS tidak memiliki lintasan multipath antara TX dan RX. Hasil pengukuranmenampilkan grafik perbandingan bit error rate (BER) pada saat kondisi indoor dan outdoordengan perubahan jarak 4 meter, 5 meter, dan 6 meterhasil pengukuran pada saat nilai BER = -35 dBm pada jarak 4 meter pada kondisi outdoor menghasilkan nilai BER = 7.083x10-3 sedangkan pengukuran indoor nilai BER = 1.458x10-3 dari hasil pengukuran skema STBC sistem MIMO-OFDM pada saat kondisi outdoor lebih jelek di bandingkan dengan kondisi indoor
Design and Construction of an IoT-Based Coconut Milk Processing Machine to Become VCO Idris, Mahmud; Agussationo, Yudhi; Zaqy, Sandi Yudha Barri
Jurnal INOVATOR Vol. 8 No. 2 (2025): Jurnal INOVATOR
Publisher : LPPM Politeknik Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37338/inovator.v8i2.503

Abstract

Virgin Coconut Oil (VCO) is a processed product from coconut flesh in the form of a clear, tasteless liquid with a distinctive coconut aroma. VCO is obtained through processing coconut milk with several methods, namely the gradual cooking method, the oil fishing method, and the fermentation method. Of these three methods, gradual heating is the most commonly used. This process requires a stable heating device to produce quality VCO. Therefore, to maintain the stability of the heating, precise control is required in the gradual heating method. The heating device is designed to streamline the processing process with an IoT-based control system. This VCO processing device is designed with a temperature control system using an NTC sensor with a high accuracy of ±1.5°C to ensure temperature stability during the coconut milk heating process using a dual-core ESP32 microcontroller that has WiFi connectivity features, thus enabling integration into the Internet of Things (IoT) system for remote monitoring. For the heating process, this device is equipped with a 220V 400W heating element controlled by a Solid State Relay (SSR), so that the temperature can be precisely controlled in the range of 60–90°C.
Co-Authors Andri Arianto Anielyn Beatris Malango Maizal Isnen Mazwan Mazwan Pirza Hariyanto Rizki Ramadhoni Rizki Ramadhoni Sepdian Sepdian Sepdian, Sepdian Sigit Kurniawan Sigit Kurniawan Sigit Kurniawan Tanto Tanto Violla Gunova Yudhi Agussationo Zaqy, Sandi Yudha Barri