Teknik Mitigasi ICI Menggunakan FIR-MMSE FEQ Pada Sistem OFDM Bergerak

Harinto Mukti Legowo, Gamantyo Hendrantoro, Titiek Suryani
Submission Date: 2012-07-24 10:51:04
Accepted Date: 2013-01-08 12:02:28

Abstract


Efek Doppler yang ditimbulkan pada komunikasi bergerak (mobile communications) menyebabkan terjadinya ICI yang dapat menurunkan kinerja sistem OFDM. Pengaruh ICI dapat dimitigasi dengan menggunakan frequency-domain equalizer (FEQ) dimana koefisien-koefisien tap filter tersebut didapatkan dari hasil perhitungan invers matrik kanal domain frekuensi (matrik G) berukuran NxN. Namun semakin besar ukuran N, perhitungan invers matrik G akan semakin rumit. Sifat banded dapat dimanfaatkan untuk menyederhanakan perhitungan invers matrik G. Dengan mengasumsikan sifat banded pada matrik G, maka hanya Q (Q << N) diagonal pada matrik G yang digunakan pada perhitungan invers matrik G. Berdasarkan sifat banded tersebut, teknik mitigasi ICI yang bernama finite impulse response (FIR) MMSE FEQ dengan koefisien tap sebanyak Q dapat didesain.

Keywords


OFDM; mobile communication; matrik banded; FIR-MMSE FEQ

Full Text: PDF

CC Licencing


Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).

Refbacks

  • There are currently no refbacks.


Creative Commons License
Jurnal Teknik ITS by Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
Based on a work at http://ejurnal.its.ac.id/index.php/teknik.