Abstract
The work presented considers a Physical Layer Network Coded (PNC) communication which is affected by Intersymbol Interference (ISI) due to Rayleigh fading channel. A pre-equalizer filter configured to combat the ISI is considered at the end nodes. The relay uses the Amplify and Forward (AF) strategy. The signal in the Multiple Access (MAC) phase is amplified at the relay and forwarded to the receiving nodes. The signal received by the end nodes in the broadcast (BC) phase is subjected to post-equalization by a receiver filter configured to overcome ISI. The performance of the PNC with only pre-equalizer applied, only post-equalization applied and the combined effect of pre-equalizer and post-equalizer is simulated .Simulation results indicate that the performance of PNC when only pre-equalizer applied , only post-equalization is applied are not much varying but better than the no equalization case. But the combined effect of pre-and post-equalization is much improved.
Highlights
With an aim of increasing the spatial diversity by cooperation of nodes and extending the coverage area without increasing the transmitted power there has been an intense research in the field of relay networks [1]
The relay can be a most simple AF relay to the most complex Decode and Forward (DF).AF is preferred when simplicity is of prime importance but it has an inherent drawback of noise amplification which makes DF more appealing when the noise power at the relay is high as the received signal is decoded and re-encoded before forwarding it to the destination which results in removing the effect of noise [3]
This protocol of bidirectional relaying is called as physical-layer network coding (PNC) and the two phases of communication are known as multiple access (MAC) phase and the broadcast (BC) phase
Summary
With an aim of increasing the spatial diversity by cooperation of nodes and extending the coverage area without increasing the transmitted power there has been an intense research in the field of relay networks [1]. Digital pulse shaping filter which operates at a sampling rate of fs , the highest input bandwidth must be limited to fs /2.The conventional wireless communication process the equalization is performed at the receiving end i.e. at the mobile station rather than doing it at the base station transmitter which complicates the receiver design and increases the power utilization [9]. To overcome this some of the previous works have used pre-equalization at the transmitter. The performance of transmitter based preequalization , post-equalization, the combined effect of pre-and post-equalization and the performance without any equalization are compared in the work presented
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
