Question on PR-ASK modulation

Hi All,

In UHF RFID new EPCglobal protocol, PR-ASK is added, but no more introduction .

What's the dedails on PR-ASK and how to realize the PR-ASK modulation in software or hardware, thanks!

ASK stands for Amplitude "shift" keying, in principle it means on/off type modulation like in a telegraph. You can use a TTL-driven transistor to key the transmitter power by interrupting the DC power line, you can key the RF power-amplifier DC bias. For low data rate, you can drive oscillator-transistor base directly by TTL data through a resistor, to achieve ON and OFF states.

Yes,i know what you said which is stand ASK or OOK principle.

I asked is about PR-ASK, Phase Reversed-ASK. thanks.