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SUMMARY A multiple-input multiple-output software defined radio (MIMO-SDR) platform was developed for implementation of MIMO transmission and propagation measurement systems. This platform consists of multiple functional boards for baseband (BB) digital signal processing and frequency conversion of 5 GHz-band radio frequency (RF) signals. The BB boards have(More)
A real-time multiple-input multiple-output (MIMO) channel measurement system was implemented by using a 4 x 4 MIMO software defined radio (SDR) testbed. A target application of this system is to evaluate realistic performance of closed-loop MIMO transmission in time-varying channels at 5GHz band. The results of indoor measurements showed that feedback delay(More)
We are developing a compact PCI (cPCI) based prototype of a 4 × 4 multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) system for the measurement and analysis of propagation and transmission characteristics in real environments. The target of this system is a MIMO extension of the IEEE802.11a standard, i.e. 5 GHz(More)
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