This paper presents small-scale fading measurements for 28 GHz outdoor
millimeter-wave ultrawideband channels using directional horn antennas at the
transmitter and receiver. Power delay profiles were measured at half-wavelength
spatial increments over a local area (33 wavelengths) on a linear track in two
orthogonal receiver directions in a typical base-to-mobile scenario with fixed
transmitter and receiver antenna beam pointing directions. The voltage path
amplitudes are shown to follow a Rician distribution, with K-factor ranging
from 9 - 15 dB and 5 - 8 dB in line of sight (LOS) and non-line of sight (NLOS)
for a vertical-to-vertical co-polarized antenna scenario, respectively, and
from 3 - 7 dB in both LOS and NLOS vertical-to-horizontal cross-polarized
antenna scenario. The average spatial autocorrelation functions of individual
multipath components reveal that signal amplitudes reach a correlation of 0
after 2 and 5 wavelengths in LOS and NLOS co-polarized V-V antenna scenarios.
The models provided are useful for recreating path gain statistics of
millimeter-wave wideband channel impulse responses over local areas, for the
study of multi-element antenna simulations and channel estimation algorithms.

本文研究方向为毫米波超宽带通道的小尺度衰落情况，使用定向天线进行测量，得到了不同楷向下的电压路径幅度分布与经验自相关函数，并提供了在研究天线模拟和信道估计算法时有用的路径增益统计模型。