PERBANDINGAN PERFORMANSI POLAR CODE DAN REPETITION CODE TERHADAP KANAL MULTIPATH PADA SISTEM KOMUNIKASI 5G

Kebutuhan kecepatan data yang tinggi, latency yang rendah merupakan tantangan yang akan dihadapi oleh teknologi seluler generasi kelima  (5G). Pengkodean kanal sangat diperlukan untuk mengurangi error dan deteksi error agar performansi sistem komunikasi 5G yang didapatkan dapat mencapai standardisasi Teknologi 5G yaitu low latency dan high speed data rate . Salah satu teknik pengkodean kanal 5G. Teknik pengkodean kanal sederhana yang umum digunakan pada sistem komunikasi yaitu Repetition Code. Oleh karena itu perlu dilakukan kajian mengenai seberapa efektif dari kedua teknik pengkodean kanal tersebut untuk error corection pada sistem komunikasi 5G. Jurnal ini melakukan simulasi dan analisis teknik pengkodean Polar Code dan Repetition Code pada pemodelan kanal 5G Multipath dengan menggunakan modulasi 16 QAM dan menggunakan teknik multicarrier CP-OFDM Numerology 2. Selain itu jurnal ini melakukan simulasi dan analisis pemodelan kanal 5G dengan parameter lingkungan Kota Bandung dan spesifikasi sistem 5G dengan frekuensi kerja 28 GHz. Hasil pemodelan kanal menghasilkan 9 path dengan nilai mean excess delay sebesar 5,039 ns dan RMS delay spread sebesar 22,747 ns. Pada Repetition Code nilai BER yang dihasilkan yaitu  pada Eb/No 34.62 dB dan pada Polar Code dengan BER=0 pada Eb/No > 20 dB. Nilai FER yang dihasilkan Polar Code jauh lebih rendah, pada Eb/No 19,8 dB yaitu  sedangkan Repetition Code yaitu . Sehingga Teknik Channel Coding yang efektif untuk menurunkan bit error dan frame error pada sistem komunikasi 5G adalah Polar Code

Delay Bound Analysis for Hybrid Network of IEEE 802.11n HT-Mixed Format WLAN over Fiber

This paper presents the result of delay bound parameter analysis for hybrid network of IEEE 802.11n Wireless Local Area Network (WLAN) and optical fiber. This networks use several modulation and coding schemes (MCS) with HTmixed format and distributed coordination function (DCF) access method for data transmission. ACK Timeout and CTS Timeout protocols engineering utilizing short interframe space (SIFS) time interval is used to determine the length of optical fiber extension. This extents the optical fiber lengths 5.96 km for certain condition. In addition, basic access MCS 27–40 MHz scenario produced the lowest delay and highest data rate. These results may support the implementation of big data and cloud computing flexibilit

Power control scheme using particle swarm optimization method in resource allocation process on D2D underlaying communication

Fast growing number of cellular telecommunication technology resulting on the increasing number of the user equipment. This condition increased the eNodeB load. To overcome this problem, the device-to-device (D2D) underlaying communication is introduced. In underlaying scheme, the D2D user equipment (DUE) will do the communication process using the same radio resources with the conventional cellular user equipment (CUE). To avoid a severe interference between these two types of user in the system, a good resource allocation is needed. In this work, a power control scheme using particle swarm optimization (PSO) is proposed, to manage the transmit power on each user on the system. The power control scheme take place after the greedy scheduling algorithm, after all user is given a resource block (RB) to do the communication process. The power transmit for each user is managed to reach a better system capacity, and to reduce the power consumed in one communication process. From the simulation, the PSO power control can improve the sumrate and spectral efficiency up to 12.97% and 3.38% respectively. The PSO power control also can reduce the power consumed by the system up to 8.84%. The fairness happens among the CUEs also can be maintained, despite of the decreasing fairness among DUEs