Document Type : Primary Research paper


Assistant Professor, Department of Electronics and Communication Engineering, Nehru Institute of Technology, Coimbatore 641 105


Error free transmission is one of the prime
goals in wireless communications. With the
increase in multimedia applications, large
amount of data is being transmitted over
wireless communications. This requires
error free transmission more than ever and to
achieve error free transmission multiple
antennas can be implemented on both
stations i.e. base station and user terminal
with proper modulation scheme and coding
technique. The 4th generation of wireless
communications can be attained by
Multiple-Input Multiple-Output (MIMO) in
combination with Orthogonal Frequency
Division Multiplexing (OFDM). MIMO
multiplexing (spatial multiplexing) and
diversity (space time coding) having OFDM
modulation scheme are the major area to
focus. MIMO multiplexing increases a
network capacity by splitting a high signal
rate into multiple lower rate streams. MIMO
allows higher throughput, diversity gain and
interference reduction. It also fulfills the
requirement by offering high data rate
through spatial multiplexing gain and
improved link reliability due to antenna
diversity gain. The main drawbacks faced by
the users are power dissipation in data
reordering. In this paper by using VLSI
design technique and four different modules
for FFT and IFFT process based on Radix-2
and Radix-8 method power dissipation can
be minimized.

Volume 12, Issue 3 - Serial Number 3
ICMMNT-2021 International Virtual Conference on Materials, Manufacturing and Nanotechnology, 30th June, 2021.
June 2021
Pages 620-626