Predictive dynamic channel allocation scheme for improving power saving and mobility in BWA networks
Mobile Networks and Applications
IEEE Transactions on Wireless Communications
Theoretical analysis of the orthogonality factor in WCDMA downlinks
IEEE Transactions on Wireless Communications
Throughput enhancement in multi-carrier systems employing overlapping Weyl-Heisenberg frames
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
Performance analysis of wireless hybrid-ARQ systems with delay-sensitive traffic
IEEE Transactions on Communications
EURASIP Journal on Advances in Signal Processing - Special issue on advances in single carrier block modulation with frequency domain processing
Uplink Channel Sounding in TDD-OFDM Cellular Systems
Wireless Personal Communications: An International Journal
Hi-index | 0.07 |
This paper deals with the measurement and modeling of multipath delay on fixed wireless paths at 1.9 GHz in suburban environments. The primary focus is on the delay profile, which is the normalized plot of received power versus delay in response to an RT “impulse.” We describe measurement campaigns in the western suburbs of Chicago, IL, and in suburban north-central New Jersey. Our analysis of the data suggests to us that, for directive terminal antennas, the delay profile can be modeled as having a “spike-plus-exponential” shape, i.e., a strong return (“spike”) at the lowest delay, plus a set of returns whose mean powers decay exponentially with delay. This delay profile can be characterized by just two parameters (both variable over the terrain), namely, the ratio (K0) of the average powers in the “spike” and “exponential” components and the decay time constant (τ0) of the “exponential” component. No such simple structure appears to apply for delay profiles using omnidirectional antennas. For a directive antenna with a 32° beamwidth, we find that: (1) the statistical correlation between the profile parameters K0 and τ0 is negligible; (2) these parameters are relatively insensitive to antenna height and path length; and (3) over each measured region (Illinois and New Jersey), K0 and τ0 have median values close to 8 dB and just below 0.2 μs, respectively. Moreover, we have found simple probability distributions that accurately portray the variability of K0 and τ0 over the terrain