N. Arsalane.et al. Int. Journal of Engineering Research and Applications www.ijera.com ISSN: 2248-9622, Vol. 6, Issue 4, (Part - 5) April 2016, pp.49-52 www.ijera.com 49|Page Emulation OF 3gpp Scme CHANNEL MODELS USING A Reverberation Chamber MEASUREMENT TEST BED N. Arsalane 1 , C. Decroze 2 , D. Carsenat 3 , M. Mouhamadou 4 1 Institut De Génie Appliqué Casablanca, Maroc 2 Institut De Recherche XLIM, Limoges, France ABSTRACT The MIMO OTA way forward was approved at the 3GPP RAN4 #62bis meeting in Jeju (Korea) [1], and among the remaining works to be accomplished it was highlighted that the channel model had to be validated across methods in order to ensure that a minimal number of artifacts are inserted into the channel model by any given methodology and that the different methods reproduce, and the DUT experiences, the same radio conditions regardless of the methodology.The objective of this contribution is to validate the power delay profile (PDP) for the 3GPP SCME Urban macro (UMA) and Urban micro (UMI) channel models emulated in a mode-stirred reverberation chamber for the reverberation chamber. Index Terms: Reverberation chamber, Power Delay Profile, Over The Air I. EMULATION OF 3GPP SCME WITH THE USE OF REVERBERATION CHAMBER A test bed was prepared to validate 3GPP SCME PDP emulation in an RC (candidate methodology 1) using a Vector Signal Generator (VSG) and a Digitizer. On this platform, a multi- cluster emulation method which complies with channels defined by 3GPP SCME models was implemented using only one VSG in combination to a reverberation chamber. For the purpose of this contribution, the delay spread control was achieved through modifying the RC quality factor by loading it with absorbing materials, as described earlier. On this special test-bed, the measurements were not carried out in real time, and were not dedicated to performance evaluation in terms of throughput, but rather on the validation of SCME PDP channel model emulation using reverberation chambers. However, through the use of the RF digitizer and some baseband processing, the influence of several transmission chain and MIMO antenna, signal and reception aspects such as coupling, correlation coefficient, synchronization, equalization or MIMO coding are allowed. A detailed analysis of these aspects has been sent for publication at IEEE and can be found in [3] when published along 2012. The measurement test bed, illustrated in figure 1, was based on the Aeroflex PXI 3000 series architecture, with two PXI chassis integrating a control PC for generating frames on transmission and for processing received data. Figure 1. Test bed for 3GPP PDP validation using RC candidate methodology 1. The transmit part includes one RF wideband signal generator (76 MHz - 6 GHz), which can provide a level of RF power from -120 dBm to +5 dBm over a modulation bandwidth of 33 MHz. The receiver integrated two synchronized digitizers (SIMO configuration), which provided conversion of the RF signal to baseband digital IQ symbols [4]. Data processing was done with MATLAB ® . At the transmitter side, a frame based on LTE specifications was generated. The duplex mode used was TDD, with a bandwidth of 5 MHz and a 64QAM modulation scheme over a carrier frequency of 2.35 GHz. An LTE–OFDM frame using diversity at the receiver side was implemented in the test bed. The frame was generated based on the 3GPP standard, which specify a downlink (DL) transmission system using an orthogonal frequency division multiplexing access (OFDMA). The modulation schemes supported for payload in the uplink and downlink are QPSK, 16QAM and 64QAM. The duration of the LTE frames were 10 ms. The frames were divided into 10 subframes, being every subframe 1 ms long. Each subframe contained two slots of 0.5 ms of duration, which were composed of 6 or 7 OFDM symbols, RESEARCH ARTICLE OPEN ACCESS