Perancangan Model Simulator dan Performansi Kesalahan Bit untuk Variasi Tipe Modulasi Digital Dalam Lingkungan Kanal Additive White Gaussian Noise (AWGN)

2021 ◽  
Vol 9 (1) ◽  
pp. 60-70
Author(s):  
Aditya Taufiqurrahman
Keyword(s):  
User Interface ◽  
Graphical User Interface ◽  
Bit Error Rate ◽  
Gaussian Noise ◽  
Additive White Gaussian Noise ◽  
Source Code ◽  
White Gaussian Noise ◽  
Phase Shift Keying ◽  
Shift Keying ◽  
Binary Phase Shift Keying

Penelitian ini dibuat berdasarkan permasalahan pada penelitian sebelumnya, dimana belum menampilkan gelombang sinyal sesudah melewati kanal Additive White Gaussian Noise (AWGN), serta menampilkan hasil simulasi perbandingan kesalahan bit yang ditampilkan dalam bentuk grafik kurva untuk berbagai tipe modulasi. Selain itu gelombang sinyal probabilitas kesalahan bit masih ditampilkan terpisah serta belum melakukan analisa antara perhitungan dengan hasil simulasi. Maka pada penelitian ini akan dilakukan pengembangan pada source code dan juga dibuatnya graphical user interface (GUI) Matlab beserta dengan perhitungan teoritisnya. Pada hasil simulasi jumlah bit minimal sebesar 100 bit didapatkan  untuk modulasi amplitude Shift Keying (ASK),  untuk modulasi frekuency shift keying (FSK) dan  untuk binary phase shift keying (BPSK). Sedangkan pada jumlah bit maksimum bit sebesar 500 bit didapatkan  untuk modulasi ASK,  untuk modulasi FSK, dan  untuk modulasi BPSK. Dari dua data tersebut menunjukan bahwa data simulasi sudah sesuai dengan teori yang ada, dimana semakin besar energi bit yang digunakan maka bit error rate (BER) yang dihasilkan akan semakin kecil. Kesesuaian simulasi dengan teori didukung juga oleh hasil perhitungan probabilitas kesalahan bit. Hasil simulasi dan teoritis probabilitas kesalahan bit memiliki karakteristik yang sama, dimana modulasi BPSK memiliki penurunan probabilias kesalahan bit yang lebih kecil dibandingkan modulasi ASK dan FSK. Selain itu didapatkan bahwa hasil perhitungan mengalami penurunan kesalahan bit yang lebih kecil serta ideal pada Eb/N0 yang sama untuk setiap percobaannya.

scholarly journals Design and Implementation of a Chaotic Scheme in Additive White Gaussian Noise Channel

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Nizar Al Bassam ◽  
Oday Jerew
Keyword(s):  
Bit Error Rate ◽  
Gaussian Noise ◽  
Chaotic Systems ◽  
Gaussian Approximation ◽  
Additive White Gaussian Noise ◽  
Design And Implementation ◽  
Shift Keying ◽  
Transmitted Signal ◽  
Chaos Shift Keying ◽  
Channel Environment

A new chaotic scheme named Flipped Chaotic On-Off Keying (FCOOK) is proposed for binary transmission. In FCOOK, the low correlation value between the stationary signal and its mirrored version is utilized. Transmitted signal for binary 1 is a chaotic segment added to its time flipped (mirrored) version within one bit duration, while in binary 0, no transmission takes place within the same bit duration. The proposed scheme is compared with the standard chaotic systems: Differential Chaos Shift Keying (DCSK) and Correlation Delay Shift Keying (CDSK). The Bit Error Rate (BER) of FCOOK is studied analytically based on Gaussian approximation method. Results show that the BER performance of FCOOK outperforms DCSK and CDSK in AWGN channel environment and with variousEb/Nolevels. Additionally, FCOOK offers a double bit rate compared with the standard DCSK.

scholarly journals Evaluasi Modulasi MFSK untuk Transmisi Data Melalui Kanal Suara GSM

Jurnal INKOM ◽  
2014 ◽  
Vol 8 (1) ◽  
pp. 37
Author(s):  
Rika Sustika ◽  
Oka Mahendra
Keyword(s):  
Mobile Communication ◽  
Bit Error Rate ◽  
Error Rate ◽  
Gaussian Noise ◽  
Linear Prediction ◽  
Signal To Noise Ratio ◽  
Additive White Gaussian Noise ◽  
Signal To Noise ◽  
Global System ◽  
Shift Keying

Pada tulisan ini, dievaluasi performansi skema modulasi MFSK (M-ary Frequency Shift Keying) untuk aplikasi pengiriman data melalui kanal suara GSM (Global System for Mobile Communication). Parameter yang dievaluasi berupa kesalahan bit trasmisi yang dinyatakan dengan laju kesalahan bit atau bit error rate (BER). Evaluasi ini dilakukan untuk menentukan besarnya orde M yang akan dipilih pada aplikasi pengiriman data digital melalui kanal suara GSM. Pada proses simulasi, data digital dikodekan menjadi simbol-simbol lalu dimodulasi menggunakan modulator MFSK menjadi data menyerupai pembicaraan (suara). Suara yang dihasilkan dikodekan dengan algoritma CELP (Code Excited Linear Prediction), kemudian dikirimkan melalui udara yang dimodelkan sebagai kanal AWGN (Additive White Gaussian Noise). Di sisi penerima, sinyal terima yang menyerupai suara ini didemodulasi dan dikonversi kembali menjadi data digital. Dari simulasi menggunakan Eb/No (signal to noise ratio) sebesar 6 dB, diperoleh laju bit 2,5 kbps dengan BER 2,01 x 10-3 untuk M=4, 2,22 x 10-3 untuk M=8, dan 1,87 x 10-3 untuk M=16.

Design of Modified Minsum Decoder of LDPC Code in the Simplified Difference-Domain

2013 ◽  
Vol 385-386 ◽  
pp. 1576-1581
Author(s):  
Zhong Xun Wang ◽  
Xing Long Gao
Keyword(s):  
Belief Propagation ◽  
Additive White Gaussian Noise ◽  
Ldpc Code ◽  
Phase Shift Keying ◽  
Computation Complexity ◽  
Decoding Algorithm ◽  
Ldpc Decoding ◽  
Shift Keying ◽  
Log Domain ◽  
Binary Phase Shift Keying

In this paper, we propose the modified minsum decoding algorithm of LDPC(Low-Density Parity-Check) code in the simplified difference-domain on the basis of detailed analysis of LDPC decoding algorithm in difference-domain. The simulation indicates that the proposed decoding algorithm offers almost no performance degradation compared with the BP(Belief Propagation) decoding algorithm in log-domain and the decoding algorithm in difference-domain and offers better performance than minsum decoding algorithm in log-domain and greatly reduces the computation complexity in AWGN(Additive White Gaussian Noise) channel and under BPSK(Binary Phase Shift Keying) modulation.

scholarly journals A New Efficient Technique Based on Majority Logic Decoding to Decode Linear Block Codes

2019 ◽  
Vol 8 (4) ◽  
pp. 10946-10952
Keyword(s):  
Bit Error Rate ◽  
Error Rate ◽  
Gaussian Noise ◽  
Additive White Gaussian Noise ◽  
Block Codes ◽  
White Gaussian Noise ◽  
Majority Logic ◽  
Linear Block Codes ◽  
One Step ◽  
Majority Logic Decoding

One-Step Majority logic decoding (OSMLD) codes preset a very powerful error correcting schemes due to the simplicity of their decoder. However, families of these codes are limited to a few numbers. In this paper, we present a new adaptation which generalizes the majority-logic decoding for non OSMLD codes. This technique uses MIM method to select codewords from the dual of the code with last digit equal to one and then estimates the best threshold from which we obtain the best performance in term of the bit error rate (BER). The comparison between performances of the proposed technique and other coder/decoder schemes on AWGN (Additive White Gaussian Noise) channel proves its capacity in correcting more errors.

Study on the Performance of DBPSK Communication System

2013 ◽  
Vol 427-429 ◽  
pp. 1241-1245
Author(s):  
Hong Gang He ◽  
Hai Yang Fu
Keyword(s):  
Probability Theory ◽  
Phase Shift ◽  
Bit Error Rate ◽  
Error Rate ◽  
Communication System ◽  
Simulation Method ◽  
Phase Shift Keying ◽  
Shift Keying ◽  
Binary Phase Shift Keying ◽  
Ber Performance

Focused on the communication system of differentially encoded binary phase-shift keying (DBPSK/2DPSK), this paper studies on the influences of inter symbol interferences (ISI) on the bit error rate (BER) performance and derives the BER expression that is applicable for arbitrary sending probabilities of binary symbols using the knowledge of integration and probability theory, which is then demonstrated to be correct by the Monte Caro simulation method.

scholarly journals Capacity of 60 GHz Wireless Communications Based on QAM

2014 ◽  
Vol 2014 ◽  
pp. 1-5
Author(s):  
Jingjing Wang ◽  
Na Li ◽  
Wei Shi ◽  
Yangyang Ma ◽  
Xiulong Liang ◽  
...  
Keyword(s):  
Wireless Communications ◽  
Communication Technology ◽  
Gaussian Noise ◽  
Additive White Gaussian Noise ◽  
Radio Spectrum ◽  
60 Ghz ◽  
Phase Shift Keying ◽  
First Choice ◽  
Shift Keying ◽  
Maximum Transmit Power

With apparent advantages of the several GHz license-free spectrums, 10 W maximum transmit power, and so forth, 60 GHz wireless communication technology has become the first choice for Gbps level short-range wireless communications. This paper researches 60 GHz wireless communications over the additive white Gaussian noise channel. Channel capacity with quadrature amplitude modulation (QAM) is investigated for the unlicensed 59–64 GHz radio spectrum set aside by FCC. Moreover, the capacity with QAM is compared to that with phase shift keying (PSK). It is shown that QAM is capable of providing Gbps data rate and outperforms PSK especially when the modulation order is large. The results prove that QAM is an attractive scheme for 60 GHz wireless communications.

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