Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)
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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 ]

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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]

Voice:[+1 (321) 729-3018], FAX: [+1 (321) 727-5422], E-Mail:[[email protected]]

Re: [This submission is in response to the committee’s 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.

LPD (Low Probability of Detection) Requirement Area Networks (WPANs)

Review of Two Applications of Interest

Extracted from 03/266r0

Situational awareness for soldiers
Situational Awareness for Soldiers Area Networks (WPANs)

  • 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

Security applications
Security Applications Area Networks (WPANs)

  • 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

  • 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.

dB are covert




  • Angle of Arrival Estimation

  • +

  • Range Estimate based on r^2 loss

  • =

  • Estimation of Location



BPSK, a noise like waveform, collapses to an AM modulated carrier when processed through a squaring non-linearity.



Additional PHY Requirement are covert

The alternate PHY must have at least one LPD modulation mode that takes into consideration protection against higher order spectral processing techniques.