RANCANG BANGUN DAN PENGUJIAN TEKNIK MRC PADA PENERIMA TV DVB T2

Slamet Widodo, Sri Anggraeni Kadiran

Abstract


Teknik maximal ratio combining (MRC)  merupakan salah satu teknik combining diversity yang digunakan untuk mengatasi terjadinya fading pada sistem transmisi radio. Fading pada transmisi TV digital DVB T2  menyebabkan gambar berhenti dan suara terganggu.  Dari penelitian sebelumnya menunjukkan bahwa secara simulasi,  teknik MRC mempunyai kualitas paling baik dibanding teknik combining lainnya. Pada penelitian ini, telah dibuat rangkaian MRC dengan dua input. Sinyal yang datang dikuatkan kemudian masuk ke rangkaian penggeser fasa. Untuk menghindari pembuatan IC, proses combining dilakukan pada tingkat RF (radio frequency). MRC menggabungkan dua antena penerima TV yang berjarak ¼ λ. Hasil pengukuran di laboratorium menunjukkan bahwa sistem penerima yang dibuat berhasil menggabungkan dua input sinyal pada tingkat RF, dengan penguatan yang lebih besar. Pengujian penerimaan siaran TV digital DVB T2 di daerah semarang pada kondisi diam menunjukkan bahwa sistem dapat menerima seluruh stasiun pemancar  TV digital DVB T2 di semarang dengan kualitas yang baik. Pada jarak 9 Km dari stasiun pemancar, daya yang diterima sebelum menggunakan MRC – 77,3 dBm, setelah menggunakan MRC - 71,2 dBm.

Keywords


RF combining; diversity; digital TV receiver DVB T2; MRC

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References


B Setyanto, Iswandi (2014). Combiner RF and DVB T2 signal receive, Resipository ugm.ac.id. Yogyakarta.

Chadukar S, Bharmase, (2009), Performance evaluation of equalizers and different diversity techniques using OFDM, International journal of computer technology and electronic engineering, vol1 issue 3

Dian W A (2011), Analisa simulasi performance penggunaan OFDM pada sistem DVB T, USU Medan




DOI: https://doi.org/10.46964/justti.v11i1.129

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