Hi Super_voip:
Yes, I am planning to build a fixed transmitter for the positioning purpose. After searching on the net for days, I have had some ideas of the functional blocks of the NFR system.
The system build is almost similar to the common RF communication system: Where the system consists of a transmitter and a receiver. The transmitter transmit the unmodulated sin wave to be received by the receiver. Its ok for me to build the transmitter, but its quite hard for me to build a receiver as I am not a RF guy ^^. The receiver shall consist of a pre-select filter, RF amplifier, IF filter, and eventually the phase detector (used to determine the relative phase difference of the E-field wave and H-field wave by determining the difference of zero-crossing time for both the wave). Any suggestions on the RF chip that i can use for the RF amplifier, IF filter, and zero-crossing time detection? Thank you!!!
P/S: All recommendations from any other members are appreciated!!!