Implementation of Polar Codes in 5G Systems with Different Waveform Modulations by Using USRP

Year 2019, Volume: 23 Issue: 6, 1144 - 1153, 01.12.2019

Marwan Dhuheir Sıtkı Öztürk

https://doi.org/10.16984/saufenbilder.536540

Abstract

Long Term Evolution
(LTE) is an access technique that is used in radio networks. LTE provides high
data bandwidth in transmitting data by providing flexibility against noise and
interference. Orthogonal Frequency Division Multiplexing (OFDM) technique uses
the FDM (Frequency Division Multiplexer) modulation technique to increase the
amount of carried information over the wireless network. The OFDM signal is
transmitted to the receiver at different frequencies which they are orthogonal
to each other by dividing the bandwidth of a signal into smaller sub-carriers.
Recently, the use of polar codes as a coding scheme in the new generation 5G
systems has come to the communications markets. Polar codes as a channel coding
scheme are a promising technique for the future because it is the first codes
that reach Shannon capacity limit. The cyclical prefix – OFDM (CP-OFDM), which
is used in 4G systems, performs well in many aspects, however, it has much
weakness that make the researches look for a new modulation technique to be
used in 5G systems. Filtered–OFDM (F-OFDM) is considered one solution to the
problems appeared in CP–OFDM. In this paper, the differences between CP-OFDM
and F-OFDM regarding advantages and disadvantages of each type are studied in
details. The comparison between the two modulations waveforms are done by
studying their Error Vector Magnitude (EVM) that deals with measuring the
accuracy of the received signals. Furthermore, the comparison between the two
modulations waveforms with polar codes in the USRP B210 radio are applied to
make our work more practical. 

Keywords

Polar Codes, USRP, OFDM, F-OFDM

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