MITIGATION OF INTERFERENCE IN COLOCATED WIRELESS SYSTEMS USING BASEBAND QPSK POST DISTORTION CANCELLATION

Okereke, J. O.; Nwabueze, C. A.; Akaneme, S. A.

Authors & affiliations

Okereke, J. O.

Department of Computer Engineering, Federal Polytechnic, Nekede, Imo State.

Nwabueze, C. A.

Department of Electrical/Electronic Engineering, Chukwuemeka Odumegwu Ojukwu University, Uli, Anambra State

Akaneme, S. A.

Department of Electrical/Electronic Engineering, Chukwuemeka Odumegwu Ojukwu University, Uli, Anambra State

Abstract

Summary

Intermodulation interference occurs when transmitters are co-located as well as in nonlinearity of the signal processing
during modulation. This distortion in nonlinear systems are not needed in radio signal processing because they generate
unwanted spurious emissions which occupy the spectrum of the desired signal frequency as sidebands thereby distorting
or masking the desired signal. A post distortion cancellation technique is proposed, using quadrature phase shift keying
(QPSK) baseband receiver that is capable of cancelling the intermodulation interference. In the proposed model, an
estimated copy of the distortion is coupled to a QPSK baseband receiver to be out of phase to each other to cancel out the
intermodulation interference using structured system analysis and design methodology. This proposed technique was
carried out using MATLAB/SIMULINK software where an intermodulation distortion is generated using two local colocated transmitters that have hit the desired signal and recover the transmitted message successfully. This technique is
capable of cancelling intermodulation interference that occurs in co-located setting and is able to recover the transmitted
signal that gets to the receiver, achieving a low bit error rate (BER) of 0.00064, high gain of 40dB in signal-to-noise ratio
(SNR) and

Keywords

Index Terms

Modulation Quadrature Phase Shift Keying Baseband Distortion Co-location.

Citation & details

How to cite this article

Authors: Okereke, J. O., Nwabueze, C. A., Akaneme, S. A.

Volume/Issue: Volume 3, Issue 1

Pages: 1-11

Published: April 30, 2020

Affiliations: Department of Computer Engineering, Federal Polytechnic, Nekede, Imo State., Department of Electrical/Electronic Engineering, Chukwuemeka Odumegwu Ojukwu University, Uli, Anambra State

Okereke, J. O., Nwabueze, C. A., Akaneme, S. A. (2020). MITIGATION OF INTERFERENCE IN COLOCATED WIRELESS SYSTEMS USING BASEBAND QPSK POST DISTORTION CANCELLATION. International Journal of Innovative Engineering, Technology & Science (IJIETS), Volume 3, Issue 1, 1-11.

Okereke, J. O., Nwabueze, C. A., Akaneme, S. A.. "MITIGATION OF INTERFERENCE IN COLOCATED WIRELESS SYSTEMS USING BASEBAND QPSK POST DISTORTION CANCELLATION." International Journal of Innovative Engineering, Technology & Science (IJIETS), vol. Volume 3, Issue 1, 2020, pp. 1-11.

Okereke, J. O., Nwabueze, C. A., Akaneme, S. A.. "MITIGATION OF INTERFERENCE IN COLOCATED WIRELESS SYSTEMS USING BASEBAND QPSK POST DISTORTION CANCELLATION." International Journal of Innovative Engineering, Technology & Science (IJIETS) Volume 3, Issue 1 (2020): 1-11.

@article{mitigationofinterferenceincolocatedwirelesssystemsusingbasebandqpskpostdistortioncancellation2020, author = {Okereke, J. O. and Nwabueze, C. A. and Akaneme, S. A.}, title = {MITIGATION OF INTERFERENCE IN COLOCATED WIRELESS SYSTEMS USING BASEBAND QPSK POST DISTORTION CANCELLATION}, journal = {International Journal of Innovative Engineering, Technology & Science (IJIETS)}, year = {2020}, volume = {Volume 3, Issue 1}, pages = {1-11} }

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