A comparison of 24 GHz and 2.55 GHz MIMO measurements in two indoor scenarios

MIMO measurements at 24 GHz and 2.55 GHz are compared for two buildings consisting of classrooms and offices on two college campuses. The results indicate that mutual information for 4×4 MIMO with 15 dB SNR is very similar, suggesting similar multipath structure for the two different bands. Path loss is approximately 30 dB higher at 24 GHz, mainly due to the reduced receive aperture at the higher frequency. These results suggest that 24 GHz may be a suitable replacement for near and medium range indoor wireless applications currently using the 2.4 GHz ISM band.