Manual
RaDeKL Radar ICD
107-201-001 ISSUE 2.10
MULTISPECTRAL SOLUTIONS, INC. PROPRIETARY AND CONFIDENTIAL
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peak power tag has an average transmit power level of only 0.2 nanowatts making it
equivalent to about one ten millionth (1/10,000,000) of a typical cell phone. Of
particular importance is the fact that MSSI’s WBT signal generation can be achieved
through the use of readily available low-cost components.
These short, multiple nanosecond pulses generate a correspondingly wide frequency
domain response, in many ways similar to the spreading observed with conventional
direct sequence spread spectrum (DSSS). With WBT, however, the spread bandwidth is
generated directly and not by modulation with a spreading sequence such as pseudo-noise
(PN) code. Thus, WBT is essentially a time-domain concept in which an extremely short
pulse generates an extremely wide bandwidth signal expressed by the direct Fourier
transform relationship between time and frequency. The resulting very low energy
densities result in a waveform which is exceedingly difficult to intercept and, as a
consequence, very unlikely to cause interference to other wireless systems.
There are two primary reasons for non-interference. First, MSSI’s transmitter operates at
a higher frequency range than 802.11. Second, as stated previously, the energy
transmitted on a per unit Hz basis is so low that it is undetectable by other receivers.
1.2 System Description
A block diagram of the radar is shown below in Figure 2.
Figure 2: WBT Radar System Block Diagram
The radar system is composed of three major components. The first is the return signal
processing and user data interface card. This card controls the radar WBT pulse
Processing Circuit Card
Impuls
Sourc
Puls
Shapin
Bandpass
Filte
Bandpass
Filte
LN
Diod
Detector
Vide
Conditioning
FPG
Detector
Bia
ST
Antenna
C-Band UWB Transmitter
USB -
C-Band UWB Receiver
RF Circuit Card
Powe
Conditioning
7 - 33 V
Communications
Powe
A
djustable
A
ttenuato
r
Detector
Bia
ST
C-Band UWB Transmitter
USB -
7 - 33 V
Powe