Biomedical Engineering Reference
In-Depth Information
(a)
18
16
14
50 µs
12
10
UWB data
tr
a
nsmission slots
8
Start of
a
cknowledgment
reception and data process
i
ng
6
4
Start of bea
c
on reception and
d
ata processing
Narrow band-on
Start of sleep
m
ode operat
i
on
2
Micro-controlle
r
-on
0
0
500
1000
1500
2000
Time (
μ
s)
(b)
18
16
14
100 µs
12
U
W
B data
tra
n
smission slots
10
8
6
4
Start of beac
o
n reception and da
t
a processing
Narrow band-on
2
Micro-controller -on
0
0
500
1000
1500
2000
Time (
μ
s)
(c)
18
16
14
20 µs
12
U
W
B data
transmission
s
lots
10
8
6
4
Start of bea
c
on reception and d
a
ta processing
Narrow band-on
2
Micro-controller -on
0
0
500
1000
1500
2000
Time (
μ
s)
Fig. 6.20 a Current consumption of a periodic sensor node transmitting at 100 PPB, current
consumption of a continuous sensor node transmitting at b 100 PPB, c 20 PPB
