Rancang bangun codec Reed-Solomon berbasis FPGA pada komunikasi data lewat kanal radio

Murdiyat, Prihadi (2005) Rancang bangun codec Reed-Solomon berbasis FPGA pada komunikasi data lewat kanal radio. Masters thesis, Institut Teknologi Sepuluh Nopember.

Text 2201203013-Master_Thesis.pdf - Accepted Version Download (27MB)

Abstract

Pada transmisi data digital, noise pada kana! dapat menyebabkan kesalahan penerimaan data. Untuk mengatasinya, dapat digunakan pengkodean kanal. Pada tesis ini, jenis kode yang digunakan adalah kode Reed Solomon RS(15,11 ,2) yang merupakan jenis kode FEC (Forward Error Correction) dengan elemen simbol yang diambil dari Galois Field GF(24) . Penulisan RS(15, 11 ,2) menunjukkan bahwa kode ini menerima informasi dengan panjang 11 simbol (dengan Iebar simbol = 4 bit) dan mengubahnya menjadi codeword dengan panjang 15 simbol. Secara teoritis, kode ini mampu memperbaiki kesalahan simbol maksimal sebesar t = 2.
Setelah skema encoder dan decoder RS dirancang, implementasi dilakukan pada FPGA (Field Programmable Gate Array) Xilink XC4010XLP84. Hasil pengujian menunjukkan bahwa encoder mengeluarkan codeword sesuai codeword perhitungan.
Sementara itu, decoder mampu memperbaiki kesalahan simbol maksimal 2 buah. Decoder juga mampu memperbaiki kesalahan akibat burst, selama kerusakan yang ditimbulkan burst tidak melebihi 2 simbol.
Hasil evaluasi pada kana! radio FM 100 Mhz, menunjukkan bahwa codec dapat mengurangi kesalahan akibat penurunan ratio sinyal terima ( dBJ..L V) yang identik dengan menurunnya SNR (Signal to Noise Ratio). Atau dengan kata lain adanya codec dapat memperbaiki P e simbol (Probability of symbol error).
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In digital data transmission, channel noise causes error in data reception. In order to decrease the error, channel coding could be used. This thesis uses Reed-Solomon RS (15,11,2) code which is type of FEC (Forward Error Correction) whose element symbols are taken from Galois Field GF(24) . The notation RS(15,11 ,2) shows that this code
converse 11 symbols of information (at 4 bit period) and changes it into 15 symbol codeword. Theoretically, this code is able to correct t = 2 symbols maximum.
When encoder and decoder circuits were designed, the implementation is performed to FPGA (Field Programmable Gate Array) Xilink XC4010XLP84. The test results that the encoder gives the codeword which same with the calculation codeword. In other hand, the decoder has ability to correct up to 2 symbols. The decoder could be correct burst error whose damage up to 2 symbols. The evaluation in FM 100 MHz radio channel shows that the codec could be decrease errors whose rises when received signal ratio ( dBJ.t V) is decrease that identically with SNR (Signal to Noise Ratio) decrease. In other word, the codec could be correct the Pe symbol (Probability of symbol error).

Item Type:	Thesis (Masters)
Additional Information:	RTE 621.381 5 Mur r-1 2005
Uncontrolled Keywords:	Reed-Solomon, Galois Field, Field Programmable Gate Array, SNR
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7895.G36 Field programmable gate arrays--Design and construction.
Divisions:	Faculty of Industrial Technology > Electrical Engineering > 20101-(S2) Master Thesis
Depositing User:	- Davi Wah
Date Deposited:	13 Nov 2023 04:55
Last Modified:	13 Nov 2023 04:55
URI:	http://repository.its.ac.id/id/eprint/105092

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