Indoor multipath propagation measurements at 1.3 GHz and 4.0 GHz

Dwayne A. Hawbaker, Theodore S. Rappaport

Research output: Chapter in Book/Report/Conference proceedingConference contribution


A measurement system for the dynamic channels of a portable and maintenance-free personal indoor communication system is presented. The measurement system is a time-domain dual-channel radar with a portable transmitter and receiver. The pulse receiver consists of a broadband discone antenna followed by a wideband RF bandpass filter/amplifier chain, variable attenuator, and square law video detector. An oscilloscope digitizes and records each received multipath power profile on a computer. A triggering cable is used to connect the transmitter and receiver for accurate time-delay measurements. A high-performance narrowband receiver, placed in parallel with the wideband receiver, permits simultaneous 1.3-GHz continuous wave (CW) signal strength measurements at the RF carrier. Propagation experiments are being performed in an office building, a sports arena, and two manufacturing facilities, at several locations within each building. Some measurements use a line-of-sight (LOS) path between the two terminals, and others have obstructions (OBS) between transmitter and receiver. For each location, the receiver remains stationary throughout the measurement, while the transmitter is moved 6 ft by an autonomous guided vehicle. Power impulse responses are recorded at λ/4 intervals for various antenna heights, and CW fading measurements are made continuously over each measurement.

Original languageEnglish (US)
Title of host publicationDigest - International Geoscience and Remote Sensing Symposium (IGARSS)
PublisherPubl by IEEE
Number of pages1
StatePublished - 1990
Event10th Annual International Geoscience and Remote Sensing Symposium - IGARSS '90 - College Park, MD, USA
Duration: May 20 1990May 20 1990


Other10th Annual International Geoscience and Remote Sensing Symposium - IGARSS '90
CityCollege Park, MD, USA

ASJC Scopus subject areas

  • General Engineering


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