Collaborative MIMO Reception: Measurement Campaign and Mutual Information Rate Analysis

We are developing a collaborative multiple-input multiple-output reception system consisting of a base station (BS) with multiple antennas and surrounding multiple mobile stations (MSs) with a small number of antennas for future cellular systems. The MSs virtually increase the number of receiving antennas by forwarding the received waveform data using higher-frequency bands and decode the multiple received streams from the BS. The multiple received spatially multiplexed streams experience quantization errors, which are induced by digitized waveform forwarding. We obtain experimental results for the mutual information rate by conducting a measurement campaign around an urban area, in which channel state information is measured on a moving vehicle.