Performance analysis of 16-QAM and 64-QAM with Low Density Parity Check Code on Wireless Communication System Endah Setyowati, Galura Muhammad Suranegara, Ahmad Fauzi, Banda Subagja
Universitas Pendidikan Indonesia
Abstract
Wireless communication systems evolve according to the needs of their users. In a communication system, it is necessary to determine the use of methods in order to obtain good system performance. One of them is the accuracy in the use of modulation in a communication system. QAM is known to have a fairly good performance for communication systems. M-ary QAM is a QAM modulation with M-ary values of 4, 8, 16, 32, 64, and so on which are multiples of 2. The higher the M-ary value, the higher data rates will support. However, if the channel condition is poor, then the small M-ary value must be small. Because if the M-ary value is bigger on a bad channel, it will cause more errors. In addition, the use of LDPC code as channel coding can provide additional improvements to system performance. In this paper, the results of the system performance on the use of 16 QAM and 64 QAM on a channel are simulated using MATLAB software. It is known that by using 16-QAM and LDPC code, a smaller SNR value is obtained than using 64-QAM to achieve the target BER 10-3.
