Survey of Wireless Networking
InfraRed - Ir
for more information see www.irda.org
Characteristics of IrDA Control Physical Signaling:
Distance and range
Direction
Data transmission Rate
Data Coding
Data packets protection
Notes:
Characteristics of IrDA Control Physical Signaling:
•Distance and range equivalent current uni-directional infrared remote control units (minimum 5 meter range).
•Bi-directional communication is the basis of all specs.
•Data transmission at 75 kb/s at the top end
•The data is coded using a 16-Pulse Sequence multiplied by a 1.5 MHz subcarrier which is allocated for high speed remote control in IEC 1603-1 although this base band scheme has harmonics which can intrude upon other IEC bands.
•Data packets are protected with a CRC (CRC-8 for short packets and CRC-16 for long packets). The physical layer is optimized for low power usage and can be implemented with low-cost hardware.