Slide 1Rick Roberts, Harris Corporation

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Project IEEE P802.15 Working Group for Wireless
Personal Area Networks (WPANs) Submission Title
802.15.4SGa Call for Application Response Date
Submitted November, 2003 Source Rick
Roberts, Harris Corporation Address P.O. Box
37, Melbourne, Fl. 3290X Voice1 (321)
729-3018, FAX [phone],
E-Mailrrober14_at_harris.com Re This
submission is in response to the committees
request to identify applications enabled by an
alternate 802.15.4 PHY Abstract Low
Probability of Detection Purpose For
discussion by IEEE 802.15.SG4a Notice This
document has been prepared to assist the IEEE
P802.15. It is offered as a basis for discussion
and is not binding on the contributing
individual(s) or organization(s). The material in
this document is subject to change in form and
content after further study. The contributor(s)
reserve(s) the right to add, amend or withdraw
material contained herein. Release The
contributor acknowledges and accepts that this
contribution becomes the property of IEEE and may
be made publicly available by P802.15.
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LPD (Low Probability of Detection)
Requirement Review of Two Applications of
Interest Extracted from 03/266r0
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Situational Awareness for Soldiers

• No Effective Means of Indoor Location
• Confusion and lack of Communication and Control
• Sounds are confusing and difficult to localize
• Seconds count...
• Localizers provide ID and location
• Avoid Fratricide
• Positive IFF

Source Patrick HoughtonAetherwire Location
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Security Applications

• Enhancing CCTV coverage
• Activity-based video stream selection
• Daytime intruder detection
• Correlate data from active tracking and passive
  (IR, weight, radar) sensors
• Visitor management
• Enforcing restricted zones and escort policies
• Asset tracking
• Automatic man-down detection

• Demand now Defense contractors, gemstone
  processing facilities

Source Peter BattyUbisense Limited
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• Both these applications one have element in
  common they are covert.
• A soldier or a police officer in a hostile
  situation does not want their location revealed
  even their approximate location!
• A security sensor deployment situation may not
  want to have the location of sensors revealed
  or even that there are sensors deployed.
• Some modulation formats inherently lack LPD
  properties when subjected to higher order
  spectral processing techniques an example is
  BPSK used in conjunction with a squaring
  non-linearity.

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dB
Hz
TX
data

• Angle of Arrival Estimation
• Range Estimate based on r2 loss
• Estimation of Location

LO
RX
BPSK, a noise like waveform, collapses to an AM
modulated carrier when processed through a
squaring non-linearity.
dB
Hz
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Additional PHY Requirement The alternate PHY
must have at least one LPD modulation mode that
takes into consideration protection against
higher order spectral processing techniques.