Measurement investigation of tap and cluster angular spreads at 5.2 GHz

• Published in: IEEE transactions on antennas and propagation Vol. 53; no. 7; pp. 2156 - 2160
• Main Authors: Kai Yu, Qinghua Li, Ho, M.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.07.2005; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Algorithms; angular spread; Antenna arrays; Antennas; Applied sciences; Bandwidth; channel modeling; Channels; Clustering algorithms; Clusters; Delay lines; Diffraction, scattering, reflection; Exact sciences and technology; Extraterrestrial measurements; Frequency domain analysis; Frequency estimation; Indoor; Mathematical analysis; Maximization; Measured channel; MIMO; multipath component; Radiocommunications; Radiowave propagation; Signal processing; Spreads; Telecommunications; Telecommunications and information theory; Wireless LAN; MIMO system; channel modeling; Wireless telecommunication; Measurement result; Transmission channel; Multipath propagation; Frequency domain method; Modeling; Measured channel; multipath component; antenna arrays; angular spread; EM algorithm; Antenna array
• ISSN: 0018-926X; 1558-2221; 1558-2221
• DOI: 10.1109/TAP.2005.850721

In this paper, we present indoor measurement results on the cluster angular spread (AS), the tap AS and its variation with different channel bandwidths. A frequency domain space alternating generalized expectation maximization (FD-SAGE) algorithm is employed to estimate the multipath components from the measured data. We then manually identify the clusters of the multipaths and calculate the tap and cluster ASs for each identified cluster. It is found that for the 100 MHz channels, the average tap AS is just few degrees less than the cluster AS and the difference diminishes for less channel bandwidth.