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AN OFDM Platform for Wireless Systems Testing: Alamouti 2x1 MIMO Example

Violas, M. ; Lourenço, J.L. ; Silva, A. ; Gameiro, A.

WSEAS Trans. on Communications Vol. 13, Nº 1, pp. 672 - 682, December, 2014.

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Abstract
In this paper, we present a real-time implementation of an OFDM hardware platform. The platform is based on HW blocks that can be put together to configure a wireless system based on OFDM modulation. The platform can be easily upgraded to test pre-coding cooperation algorithms. We evaluate the platform to implement a diversity Alamouti 2×1 MIMO scheme wireless system. The testbed is implemented using Field-Programmable Gate Array (FPGAs) through Xilinx System Generator for DSP. Blocks for time-domain synchronization and channel estimation are key components necessary in transmission system that require good time synchronization and channel estimation for efficient demodulation.