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Impulse response measurements for Personal Communication Services (PCS) were taken in the 1850-1990 MHz band in three outdoor macrocellular (cell radii of 5 km) environments: flat rural, hilly rural, and urban high-rise. The data were analyzed to provide information to assist in the development of radio propagation channel (especially tapped delay line) models for PCS applications. Analyses included number of paths, path arrival time, and path power statistics. Results of the analyses were found to be highly dependent on the threshold level used in processing. The urban high-rise cell showed a far greater number of paths than the rural cells for threshold levels 20 and 10 dB below the normalized peak of the power delay profiles.

Wideband propagation measurements for PersonalCommunication Services (PCS) were taken in the I8.50-I990 MHz band in three direrent outdoor macrocellular (cell radii of 5 kin) envir0nments:flat rural, hilly rural, and urban high-rise. n e data were analyzed to provide a description of the statistical behavior of the impulse responses in each cell. 7his analysis included RMS delay spread statistics, multipath power statistics, number of paths and path arrival time statistics, and effects of spatial diversity. l'he number of paths and path arrival time statistiu provide particularly usefil information in the design of tapped delay line models of the radio channel for PCS applications.Telecommunication Sciences and Telesis Technologies Laboratory.This system is comprised of a separate transmitter and receiver. For these measurements, the receiver was placed at the center of the cell in a fixed location and the transmitter was installed in a mini-van. A single, binary phase-shift keyed (BPSK), PN code sequence was transmitted at a lO-Mbit/s rate and a dualchannel receiver employing spatial diversity (with a 15 wavelength separation) was used to receive the transmitted signal. The transmitter power level was set to 50 W effective isotropically radiated power (EIRP). The receiver had a processing gain of 27 dB and a noise figure of approximately 7.5 dB. The maximum measurable delay was 51.1 p s .