Design and Implementation of a Truly-Wireless Real-Time Sensor/Actuator Interface for Discrete Manufacturing Automation - Networked Embedded Systems - page 732

WISA-WISA interference

1.E+00

Normalized
number of
transmissions

1.E-01

1.E-02

1.E-03

1.E-04

1.E-05

1.E-06

1 2 3

Number of transmission attempts

4 5 6

Reference 1 interfering BS 2 interfering BS

3 interfering BS

(a)

WISA-WLAN interference

1E+00

Normalized
number of
transmissions

1E-01

1E-02

1E-03

1E-04

1E-05

1E-06

1 2 3

Number of transmission attempts

4 5 6

d = 7.5 m d = 4 m d = 1 m

Reference

(b)

WISA-BT interference

1E+00

Normalized
number of
transmissions

1E-01

1E-02

1E-03

1E-04

1E-05

1E-06

1 2 3

Number of transmission attempts

4 5 6

1 m BT

Reference

(c)

FIGURE . =

 µs). (a) WISA-WISA ( m distance), (b) WISA-WLAN, (c) WISA-Bluetooth. (From Schieble, G., Dzung, D.,
Endresen, J., and Frey, J.-E., IEEE Ind. Electron. Mag ., , , . With permission.)

Measured retransmission statistics for WISA uplink messages due to interference ( retransmit