Ditemukan 4 dokumen yang sesuai dengan query
Gunawan Wibisono
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The simplest model that is frequently used for a transmission channel is the additive white Gaussian noise (AWGN) channel model. In this model the received signal is the sum of the transmitted signal and Gaussian noise. The simple channel model has great theoretical and practical importance and is an accurate model for many communication channels, such as satellite and deep space communication channels. In many communication systems, however, the channels are subject to various impairments ...
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Depok: Fakultas Teknik Universitas Indonesia, 2000
LP-pdf
UI - Laporan Penelitian Universitas Indonesia Library
Gunawan Wibisono
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The BER performance of trellis coded (TC) 8PSK with 2-branch selection (SC) and maximal ratio combining (MRC) diversities on mobile satellite communication system, which channel characterized by Nakagami fading channel is investigated. The special case of 2 branch SC and MRC diversities on independent and spatially correlated Nakagami fading are analyzed in detail, It is shown that the BER performance of TC 8PSK with diversity is better than that system without diversity, and the BER ...
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Fakultas Teknik Universitas Indonesia, 2000
LP 2000 37
UI - Laporan Penelitian Universitas Indonesia Library
Gunawan Wibisono
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Trellis coded modulation (TCM) formats with their excellent bandwidth and power efficiency have been widely employed in various communication systems. For mobile satellite communications, trellis coded (TC) M-ary phase shift keying (MPSK) is the primary candidate modulation technique. In the first generation mobile satellite systems, co-channel interference (CCI) does not pose a serious problem. However, second generation systems are expected to reuse frequency to increase the orbit slot spectral efficiency. Then the CCI from adjacent ...
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Depok: Fakultas Teknik Universitas Indonesia, 2001
LP-pdf
UI - Laporan Penelitian Universitas Indonesia Library
Anak Agung Kompiyang Karmana Putra
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Untuk memperluas jangkauan layanan komunikasi VHF penerbangan saat ini, maka perlu dikembangkan sistem komunikasi VHF berbasis satelit. Penelitian ini bertujuan untuk mensimulasikan dan menganalisis komunikasi suara pada AMS(R)S frekwensi VHF (117,975 - 137 MHz) menggunakan satelit LEO sesuai dengan studi yang sedang berlangsung oleh ICAO dan ITU. Perhitungan link budget dengan parameter gain antenna pesawat = -1 dBi, gain antenna satelit = 8 dBi, RF pesawat = 16 watt dan RF satelit = 85 watt, ...
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Depok: Fakultas Teknik Universitas Indonesia, 2023
T-pdf
UI - Tesis Membership Universitas Indonesia Library
