abstract: As a part of the Flexible Interoperable Transceiver (FIT) program, the
goal of this measurement series was to define communication
link characteristics at different frequencies over a representative cross section
of military installation. Basic transmission loss and delay statistics were used
as metrics for evaluation.
 
Carrier frequencies: 440 MHz, 1360 MHz, 1920 MHz
Quad channel: simultaneous acquisition of different frequencies
Mobile receiver, stationary transmitter
Tx power: 35 dBm EIRP for 440 MHz, 42 dBm EIRP for 1360 MHz and 1920 MHz
Antennas: Tx: vertical dipoles strategically located atop buildings or hills
    Rx: whip antennas mounted at the roof of the measurement van
Measurement environments: 1) desert, 2) medium vegetation on rolling hills and valleys
    3) dense vegetation
Data marked with GPS coordinates and speed
Linear Automatic Gain Control (AGC) amplifier (with 70-dB dynamic range) used to normalize signals 
PN code bit rate: 10 MBits/sec (20 MHz null-to-null bandwidth)
Resolution: 100 ns (100ft)
Maximum delay: 51.1 us (microseconds)
Number of acquisitions: 128 impulses (approximately 388 ms)
Absolute timing to give accurate time of travel