The Raptor™ is
a high-resolution PCS and Cellular CDMA channel sounder system sutiable for indoor propagation
studies as well as for outdoor RF sounding. The system consists of
two units: a portable, battery-powered correlating receiver Rx and
a 3-watt transmitter Tx. The transmitter outputs a BPSK modulated
signal that is a 4x over-sampled PN sequence of 255 chips in length.
The sampling frequency is up to 100 MHz. The correlating receiver
also samples the demodulated baseband signal at 100 MHz. This allows
the resolution of multiple RF paths down to 40-50 ns. The highest
delay spread that can be monitored at the same time without ambiguity
of reflections is up to 10.2 µs. RF sensitivity with this bandwidth
will be greater than 85 dBm. |
