  An indoor layout sensing and localization system in 60GHz millimeter wave
(mmWave) band, named mmReality, is elaborated in this paper. The mmReality
system consists of one transmitter and one mobile receiver, each with a phased
array and a single radio frequency (RF) chain. To reconstruct the room layout,
the pilot signal is delivered from the transmitter to the receiver via
different pairs of transmission and receiving beams, so that the signals at all
antenna elements can be resolved. Then, the spatial smoothing and
two-dimensional multiple signal classification (MUSIC) algorithm is applied to
detect the angle-of-arrival (AoAs) and angle-of-departure (AoDs) of the rays
from the transmitter to the receiver. Moreover, the technique of multi-carrier
ranging is adopted to measure the distance of each propagation path.
Synthesizing the above geometrical parameters, the location of receiver
relative to the transmitter can be pinpointed, both line-of-sight (LoS) and
non-line-of-sight (NLoS) paths can also be determined. Therefore, the room
layout can be reconstructed by moving the receiver and repeating the above
measurement in different locations of the room. At the end, we show that the
reconstructed room layout can be utilized to locate a mobile device according
to its AoA spectrum, even with single access point.
