ICTACT Journal on Communication Technology

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Constructing Low-Density Parity-Check Codes in Digital Communication System


Affiliations
1 Department of Electronics and Communication Engineering, Government College of Technology, Coimbatore, India
     

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In data communications, errors occur when the data travels through different communication channels. Their errors have to be reduced to obtain efficient Bit Error rate (BER). Over unreliable or noisy communication channels, errors in data can be controlled effectively using Error-Correcting Code (ECC). NI USRP (National Instruments Universal Software Radio Hardware) 2954R support 5G with multi-radio cooperation using Multiple- Input, Multiple Output (MIMO) techniques. The frequency of NI USRP 2954R ranges from 10 MHz to 6GHz with 160MHz bandwidth. In a software radio by mean of software upgrade a new technology can be easily implemented whereas the functionality is defined in software itself. Thus, in 4G communication, a Forward Error Correction Code (FEC) like LDPC is used. In this paper LDPC codes with Binary Phase Shift Keying (BPSK) modulation is simulated with NI lab-view and the performance of the LDPC code for the dimension (100,50,3) is analyzed. The experimental results demonstrate that as a Signal to Noise Ratio (SNR) increases, BER decreases.

Keywords

LDPC code, BER, AWGN, Modulation.
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  • Constructing Low-Density Parity-Check Codes in Digital Communication System

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Authors

P. Dhivya Lakshmi
Department of Electronics and Communication Engineering, Government College of Technology, Coimbatore, India

Abstract


In data communications, errors occur when the data travels through different communication channels. Their errors have to be reduced to obtain efficient Bit Error rate (BER). Over unreliable or noisy communication channels, errors in data can be controlled effectively using Error-Correcting Code (ECC). NI USRP (National Instruments Universal Software Radio Hardware) 2954R support 5G with multi-radio cooperation using Multiple- Input, Multiple Output (MIMO) techniques. The frequency of NI USRP 2954R ranges from 10 MHz to 6GHz with 160MHz bandwidth. In a software radio by mean of software upgrade a new technology can be easily implemented whereas the functionality is defined in software itself. Thus, in 4G communication, a Forward Error Correction Code (FEC) like LDPC is used. In this paper LDPC codes with Binary Phase Shift Keying (BPSK) modulation is simulated with NI lab-view and the performance of the LDPC code for the dimension (100,50,3) is analyzed. The experimental results demonstrate that as a Signal to Noise Ratio (SNR) increases, BER decreases.

Keywords


LDPC code, BER, AWGN, Modulation.

References