Wireless Communication

Nikhil Marriwala ¹, O. P. Sahu ², Ritu Khullar ³, Anil Vohra ⁴

Affiliations
1 Communication Engineering Department,University Institute of Engineering and Technology, Kurukshetra University, Kurukshetra, IN
2 Communication Engineering Department, NIT, Kurukshetra, IN
3 Electronics and Communication Engineering Department, University Institute of Engineering and Technology, Kurukshetra University, Kurukshetra, IN
4 Electronics Science Department, Kurukshetra University, Kurukshetra, IN

Abstract

A Software Defined Radio (SDR) is a reconfigurable radio, in which channel modulation waveforms are defined in software. In this paper Software Defined Radio (SDR) 4-bit QAM Modem for Gaussian Channel is implemented using  abVIEW software. LabVIEW is a graphical development environment with built-in functionality for simulation, data acquisition, instrument control, measurement analysis, and data presentation. The aim of this paper is to simulate SDR for next generation wireless communication having Gaussian channel and Adaptive Filter is used to remove Gaussian noise present in received signal and minimize the effect of Intersymbol Interference. It is obvious from the Simulation results that SDR is suitable for Gaussian channel giving Optimum Performance.

Keywords

Software Defined Radio, QAM Modem, Gaussian Channel, Adaptive Filter, ISI, LabVIEW Graphical Programming.

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Nikhil Marriwala ¹, O. P. Sahu ², Sippy Kapoor ³, Anil Vohra ⁴

Affiliations
1 Electronics and Communication Engineering Department, University Institute of Engineering and Technology, Kurukshetra University, Kurukshetra, IN
2 Electronics and Communication Engineering Department, NIT, Kurukshetra, IN
3 Electronics and Communication Engineering Department, University Institute of Engineering and Technology, Kurukshetra University, Kurukshetra, IN
4 Electronics Science Department, Kurukshetra University, Kurukshetra, IN

Abstract

We provide a brief overview over the development of software-defined radio system and channel equalization techniques. Software Defined Radio (SDR) is an all new technology being developed in the 21st century. The primary goal of Software Defined Radio is to replace as many analog components and hardwired digital VLSI devices of the transceiver as possible with programmable devices. One of the major practical problems in digital communication systems is channel distortion which causes errors due to Intersymbol Interference (ISI). In order to restore the transmitted sequence and given the observed sequence at the channel output which is accomplished by equalizers. In this paper Nonlinear equalizers, Adaptive equalizers, Fuzzy equalizers, Neural equalizers are underlined. We discuss that which equalizer is best out of these and the reasons for this also proposed.

Keywords

Adaptive Equalizers, Fuzzy Equalizers, ISI, Neural Equalizers, Nonlinear Equalizers, SDR.

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