F. Granelli et al. (Eds.): MOBILIGHT 2009, LNICST 13, pp. 93–102, 2009. @ICST Institute for Computer Sciences, Social-Informatics and Telecommunication Engineering 2009 A Mobile Multi-hop Relay Base Station (MRBS) – Relay Station (RS) Link Level Performance of Coding/Modulation Schemes, on the Basis of the REWIND Research Program Ioannis P. Chochliouros 1 , Avishay Mor 2 , Konstantinos N. Voudouris 3 , O. Amrani 2 , and George Agapiou 1 1 Hellenic Telecommunications Organization (O.T.E.) S.A., Research Programs Section, 99, Kifissias Avenue, 15126 Maroussi, Athens, Greece ichochliouros@oteresearch.gr 2 DesignArt Networks Ltd., Ha’Haroshet Street, P.O. Box 2278, Ra’anana, Israel avishaym@designartnetworks.com 3 Technological Educational Institution (T.E.I.) of Athens, Dept. of Electronics Ag. Spyridonos & Milou 1 Street, 12210 Egaleo, Athens, Greece kvoud@ee.teiath.gr Abstract. Among the essential aims of the European REWIND Research Pro- gram is to proceed to the algorithmic research and technology development of appropriate Mobile Multi-hop Relay networks based on the WiMAX technol- ogy, so that to increase coverage and throughput issues. The present work pro- vides a description of the related link-level algorithms and simulations. The study performed evaluates the link-level performance of various coding and modulation schemes with different antenna configurations over several links. In particular, it studies the "backhaul channel" which is required to support the ag- gregate cell traffic. High-rate convolution turbo codes combined with high- order modulation schemes are employed. The performance and gains associated with multiple-antenna deployments such as MISO and MIMO techniques are evaluated. Keywords: CTC (Convolutional Turbo Coding), IEEE 802.16j standard, MIMO (Multiple-Input, Multiple-Output) techniques, MISO (Multiple-Input, Single-Output) techniques, Mobile Multi-hop Relay (MMR) specification, MMR Base Station (MRBS), Relay Station (RS), WiMAX. 1 Introduction There are various choices available for operators when deploying Base Stations (BSs) to improve indoor or outdoor coverage or to increase network capacity. These can include macro-cells, micro-cells, or pico-cells in an outdoor environment; pico-cells in public indoor locations (or within enterprise buildings), and; femto-cells for resi- dential use ([1], [2]). The primary difference between these cells (performance-wise)