Performance Analysis Of Cyclic Prefix OFDM Using Adaptive Modulation Techniques
Authors/Creators
- 1. Assistant Professor, Bengal Institute of Technology, Kolkata
- 2. Assistant Professor, Dr B C Roy Engineering College, Durgapur
- 3. Assistant Professor, National Institute of Technology, Silchar
- 4. Assistant Professor, B.P.Poddar Institute of Management and Technology
Description
A Orthogonal Frequency Division Multiplexing (OFDM) scheme provides high spectral efficiency and
better resistance to fading environments. In OFDM the data is modulated using multiple number of sub-carriers that are
orthogonal to each other. The Inter Symbol Interference (ISI) and Inter Channel/Carrier Interference (ICI) are reduced
to a great extent with use of OFDM. A guard time, in the form of Cyclic Prefix (CP) is inserted between OFDM symbols
to eliminate both the lSI and ICI. In this article, OFDM based BPSK, QPSK and QAM modulation systems are
demonstrated incorporating AWGN channels using MATLAB Simulink model. The performance of the system is
evaluated in terms of BER. The effect of the CP on the BER is also evaluated for BPSK, 4-QAM, 16-QAM, and 64-QAM
modulation schemes.
Files
J1_2017_IJEECS.pdf
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