The verification of a deterministic spatio-temporal channel modeling approach by applying a deconvolution technique in the measurement

MIMO Wireless Channel Modeling and Experimental Characterization

“…However, preliminary comparisons of ray-tracing predictions with measurements indicate that the simulations tend to underestimate MIMO channel capacity [67], likely due more to oversimplification of the geometrical scenario representation than failure of the electromagnetic simulation approach. Other recent work [68] shows promising agreement in AOAs of measured and simulated microcells. In this case, the results can be combined with a random distribution for phase [68][69][70][71] to create a complete model.…”

“…Other recent work [68] shows promising agreement in AOAs of measured and simulated microcells. In this case, the results can be combined with a random distribution for phase [68][69][70][71] to create a complete model. Further work is needed to identify how much model detail is required to correctly represent the channel.…”

Impact of bandwidth, center frequency and spatial position on the results of ultra- wideband power delay profile measurements and accuracy of predictions

“…In the two latter works, frequency variability of environment model dielectric characteristics was considered in calculations, for which the delay profiles were obtained as an inverse Fourier transform of predicted channel frequency response. Finally, in [3], delay-angular spectrums were measured and predicted with ray tracing in small outdoor environment, demonstrating good matching for major clusters. Measurement bandwidth was 100 MHz, while angular resolution was about 4 degrees.…”

“…These integral metrics are not acceptable for validation of physical propagation mechanisms based models, as different delay and angular profiles (which provide detailed insight into propagation) may lead to identical metric values [2]. Besides, the accuracy of spatiotemporal parameters prediction should be validated for modern MIMO and wideband systems [3]. Concerning ray models validation with delay (delay-angular) profile measurements, the most relevant works known to authors are the following.…”

“…Thus, we found only a small number of works that demonstrate high accuracy in individual multipath components predictions, allowing in-depth propagation mechanisms investigation and validation, like [2] with 1 GHz bandwidth and MPM enhancement (indoors), [6] with 400 MHz bandwidth (outdoors), [3] with 100 MHz bandwidth (outdoors). Numerous other contributions exist for which the bandwidth is small enough (8 -100 MHz), however, they are used for rms delay spread and even delay profile prediction validations, like in [9], often leading to unacceptable results.…”