Study of Applying Different Modulation Techniques with Orthogonal Space-Time Block Coding to MIMO System

• Main Authors: Yu-fong Chien, 簡裕峰
• Other Authors: Song-Char Jiang
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/62408466592288727678

碩士 === 國立雲林科技大學 === 電機工程系 === 103 === Multiple-intput multiple-output (MIMO) and orthogonal frequency division multiplexing (OFDM) are the main techniques in Long Term Evolution-Advanced (LTE-A). The Long Term Evolution-Advanced (LTE-A) is the standard for communication system. In this paper, we applied Space-time Block Coding (STBC) and Orthogonal Space-Time Block Coding (OSTBC) to MIMO OFDM, and used Binary Phase Shift Keying (BPSK), Quadrature Phase Shift Keying (QPSK) and Quadrature Amplitude Modulation (QAM) to compare bit error rate (BER) with two by one to two by two antennas. According MATLAB simulation results, it is observed that he curve of bit error rate (BER) is steepening when Signal-to-noise ration (SNR) is increasing. It is also found to increase the number of antennas can reduce the bit error rate (BER). Therefore, the combination of MIMO technology and space-time coding (STBC) technology can improve the reliability of the channel to reduce the bit error rate(BER).