Implementation of re-configurable Digital front end module of MIMO-OFDM module using NCO
This paper focuses on FPGA implementation of Reconfigurable Digital Front end MIMO-OFDM module. The modeling of the MIMO-OFDM system was carried out in MATLAB followed by Verilog HDL implementation. Unlike the conventional OFDM based systems, the Numerically Controlled Oscillators (NCO) is used for mapping modulated data onto the sub carriers. The use of NCO in the MIMO-OFDM system reduces the resource utilization of the design on FPGA along with reduced power consumption. The major modules that were designed, which constitute the digital front end module, are Quadrature Phase Shift Keying (QPSK) modulator/demodulator, 16-Quadrature Amplitude Modulation (QAM) modulator/demodulator and NCOs. Each of the modules was tested for their functionality by developing corresponding test benches. In order to achieve real time reconfigurability of the proposed architecture, the proposed approach is realized on FPGAs optimizing area, power and speed. Reconfigurability of the proposed approach is dependent upon user requirement. Hence the proposed approach can support future generation communication technologies that are based on MIMO-OFDM.
Keywords: OFDM, NCO, MIMO, QPSK, QAM, FPGA.
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ABOUT THE AUTHORS
Veena M.B.
received B.E.,degree from Mysore university and M.E.,degree from Bangalore university in Electronics & communication . Currently pursuing Ph.D from V.T.U., Belgaum, at research center SJCE,Mysore. India. Presently working as a Assistant professor, Dept. of Telecommunication Engineering, Vemana Institute of Technology, Bangalore, India.Her Research interest in the field of MIMO wireless communication, circuits & systems, DSP, VLSI design & VLSI architectures for wireless systems.
Dr. M.N. Shanmukha Swamy
received B.E. & M.E.,degree in Electronics & communication from Mysore university. Ph.D from IISC, Bangalore, India. Presently working as a professor, Dept of Electronics & communication Engineering, SJCE, Mysore, India. His research interest in the field of wireless communication system, circuits & systems, VLSI. Adhoc networks & Image processing. He is guiding many research student from different universities.
Veena M.B.
received B.E.,degree from Mysore university and M.E.,degree from Bangalore university in Electronics & communication . Currently pursuing Ph.D from V.T.U., Belgaum, at research center SJCE,Mysore. India. Presently working as a Assistant professor, Dept. of Telecommunication Engineering, Vemana Institute of Technology, Bangalore, India.Her Research interest in the field of MIMO wireless communication, circuits & systems, DSP, VLSI design & VLSI architectures for wireless systems.
Dr. M.N. Shanmukha Swamy
received B.E. & M.E.,degree in Electronics & communication from Mysore university. Ph.D from IISC, Bangalore, India. Presently working as a professor, Dept of Electronics & communication Engineering, SJCE, Mysore, India. His research interest in the field of wireless communication system, circuits & systems, VLSI. Adhoc networks & Image processing. He is guiding many research student from different universities.
