This paper presents results of wide band path loss and delay spread measurements for two representative microcellular environments in the San Francisco Bay area in the 1900 MHz band. The results presented in this paper provide insight into the statistical distributions of measured path loss by showing the validity of a double regression model with a break point at a distance that has first Fres...

The effects of different combinations of antenna patterns and polarizations on path loss and rms delay spread in indoor obstructed channels at 2.45 G Hz are treated in this paper. Based on measurement results, and assuming the main beams of the antennas are lined up on boresight, it appears that using vertically polanzed (VPJ antennas at both the transmitter and the receiver can provide smaller...

Time delay spread and path loss measurements were performed in a large, active train yard to support development of intra-yard wireless communication systems, such as those intended to communicate with individual railcars and for track-to-terminal communications. Propagation measurements focused on three sites within the train yard: a close-in site, a paralleltrack site, and a cross-track site....

The results of wide band delay spread and time delay jitter measurements collected from five factory buildings are presented here. Carrier frequency was 1282 MHz. The data show that excess mean delay, r.m.s. delay spread, and time delay jitter values in single-story factory buildings are similar to values observed in and around multi-story office buildings. Differential time delay jitter measur...

This paper deals with the capacity behavior of wireless orthogonal frequency-division multiplexing (OFDM)-based spatial multiplexing systems in broad-band fading environments for the case where the channel is unknown at the transmitter and perfectly known at the receiver. Introducing a physically motivated multiple-input multiple-output (MIMO) broad-band fading channel model, we study the influ...

This paper reports the measurement and analysis of wideband radio channel at 1900 MHz within a special propagation environment as the Olympic Stadium of Athens. RMS delay spread values are evaluated as well as the coherence bandwidth of the channel is derived by the frequency correlation function. Mean delay spread was found 0.314 μs and 0.731 μs for LoS and NLoS conditions respectively. The me...