28 GHz and 73 GHz millimeter-wave indoor propagation measurements and path loss models

Abstract

Abstract-This paper presents 28 GHz and 73 GHz millimeterwave propagation measurements performed in a typical office environment using a 400 Megachip-per-second broadband sliding correlator channel sounder and highly directional steerable 15 dBi (30• beamwidth) and 20 dBi (15 • beamwidth) horn antennas. Power delay profiles were acquired for 48 transmitter-receiver location combinations over distances ranging from 3.9 m to 45.9 m with maximum transmit powers of 24 dBm and 12.3 dBm at 28 GHz and 73 GHz, respectively. Directional and omnidirectional path loss models and RMS delay spread statistics are presented for line-of-sight and non-line-of-sight environments for both co-and cross-polarized antenna configurations. The LOS omnidirectional path loss exponents were 1.1 and 1.3 at 28 GHz and 73 GHz, and 2.7 and 3.2 in NLOS at 28 GHz and 73 GHz, respectively, for vertically-polarized antennas. The mean directional RMS delay spreads were 18.4 ns and 13.3 ns, with maximum values of 193 ns and 288 ns at 28 GHz and 73 GHz, respectively.Index Terms-Millimeter-wave; 28 GHz; 73 GHz; indoor propagation; indoor environment; path loss; RMS delay spread; close-in free space reference model; polarization.

E-band millimeter wave indoor channel characterization

“…Similarly to our scenarios, note that these values have been determined for measurements in LOS conditions. Measurements in NLOS scenarios show larger values of the path loss exponent [15], [19], [20].…”

“…Measurements in an office lead to a path loss exponent of 1.92 at 60 GHz [19]. [20] obtained a path loss exponent of 1.3 at 73 GHz. Similarly to our scenarios, note that these values have been determined for measurements in LOS conditions.…”

“…Rms delay spread values ranging from 3 to 15 ns, and 2 to 12 ns are obtained [21] at 70 GHz in an office room and shopping mall, respectively. An average rms delay spread of 3.30 is measured in a typical office at 73 GHz [20]. Measurements of rms delay spread reported values between 5 and 15 ns with a mean value of 8.80 ns at 58 GHz in an indoor environment [22].…”

Indoor Corridor Wideband Radio Propagation Measurements and Channel Models for 5G Millimeter Wave Wireless Communications at 19 GHz, 28 GHz, and 38 GHz Bands

“…The path loss, shadowing, polarization properties, and root mean square (RMS) delay spread were obtained. Some measurements have been conducted by New York University (NYU) in the 28 GHz and 73 GHz frequency bands in a typical indoor office environment [13][14][15][16]. Three large-scale propagation path loss models for use over the entire microwave and mmWave radio spectrum, namely, the alpha-beta-gamma (ABG) model, the close-in (CI) free space reference distance model, and the CI model with a frequency-weighted path loss exponent (CIF), were studied and compared for the bands from 2 to 73 GHz with different frequency bands [13].…”

“…Several channel measurements have been conducted at some mmWave bands such as 6,10,11,15,18,19,26,28,32, and 38 GHz bands. In [11], the propagation characteristics of mmWaves were investigated in an indoor corridor environment for the line of sight (LOS) scenario at 6.5, 10.5, 15, 19, 28, and 38 GHz bands.…”