MIMO OFDM SYSTEM USING QOSTBC CODE STRUCTURE FOR 16 QAM
DESIGN DETAILS
As the demand for high-data rate multimedia grows, several approaches such as increasing modulation order or employing multiple antennas at both transmitter and receiver to enhance the spectral efficiency. In today’s communication systems Orthogonal Frequency Division Multiplexing (OFDM) is a widespread modulation technique. Its benefits are high spectral efficiency, robustness against inter-symbol interference, ease of implementation using the fast Fourier transform (FFT) and simple equalization techniques. The combination of the OFDM systems with the multiple-input multiple-output (MIMO) technique is known as MIMO-OFDM systems.
MIMO-OFDM system has been currently recognized as one of the most competitive technology for 4G mobile wireless systems. MIMO-OFDM system can compensate for lack of MIMO systems and give play to the advantages of OFDM system. In this Matlab design, a general Quasi orthogonal space time block code (QOSTBC) structure is used for multiple-input multiple-output–orthogonal frequency-division multiplexing (MIMO-OFDM) systems for 1, 2,4,6, and 8X8 antenna configuration. The signal detection technology used for MIMO-OFDM system is Zero-Forcing Equalization (linear detection technique). Here AWGN, Rayleigh and Rician channels have been used for analysis purpose. Using Matlab 2015b simulation the result the high level of modulations (i.e., 16-QAM) on MIMO-OFDM system are analysed in terms of BER vs SNR.
REFERENCES
Reference Paper-1: Performance Analysis of MIMO-OFDM System Using QOSTBC Code Structure for M-QAM
Author’s Name: Lavish Kansal, Ankush Kansal and Kulbir Singh
Source: Canadian Journal on Signal Processing
Year: 2011
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