On performance of cooperative network based on OFDM combined with TDM using MMSE-FDC in the presence of nonlinear HPA

Amir Ligata, Haris Gacanin, Fumiyuki Adachi

Research output: Contribution to journalArticlepeer-review

Abstract

In this paper, we analyze the impact of nonlinear high-power amplifier (HPA) on the performance of cooperative network based on orthogonal frequency division multiplexing combined with time-division multiplexing (OFDM/TDM) using minimum mean-square-error frequency-domain combining (MMSE-FDC) in a frequency-selective fading channel. We design a novel MMSE-FDC weights while taking into account the nonlinearity of HPA at source and relay. Closed-form symbol error rate and outage probability expressions are derived while approximating the residual inter-slot interference after the MMSE-FDC as a random Gaussian variable. We discuss and address the nonlinear OFDM/TDM system design issues in cooperative network using the obtained simulation and theoretical results. We show that the OFDM/TDM with MMSE-FDC can be used to reduce the impact of nonlinear HPA on overall performance of cooperative network in comparison to OFDM while providing the target quality-of-service for reduced required signal-to-noise ratio. This is because OFDM/TDM with MMSE-FDC achieves frequency diversity in addition to cooperative diversity, while reduced peak-to-average power ratio makes it more robust on nonlinear degradation due to HPA saturation in comparison to conventional OFDM.

Original languageEnglish
Article number185
JournalEurasip Journal on Wireless Communications and Networking
Volume2013
Issue number1
DOIs
Publication statusPublished - 2013 Dec

ASJC Scopus subject areas

  • Signal Processing
  • Computer Science Applications
  • Computer Networks and Communications

Fingerprint Dive into the research topics of 'On performance of cooperative network based on OFDM combined with TDM using MMSE-FDC in the presence of nonlinear HPA'. Together they form a unique fingerprint.

Cite this