1. Beacon Detection with VHF Assumptions
Month Year
doc.: IEEE yy/xxxxr0
April 2008
Beacon Detection with VHF Assumptions
IEEE P Wireless RANs Date:
Authors:
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Stephen Kuffner, Motorola
John Doe, Some Company

2. Month Year
doc.: IEEE yy/xxxxr0
April 2008
Abstract
In [1], the beacon packet error rates for MSF1 and MSF2 in AWGN and WRAN-B were presented and related to link margin using UHF assumptions. One of the action items from the March 2008 Plenary Session was to present the results using VHF assumptions. This submission presents those VHF results.
Stephen Kuffner, Motorola
John Doe, Some Company

3. April 2008
Stephen Kuffner, Motorola

4. VHF Link Margin Considerations
April 2008
VHF Link Margin Considerations
Express required chip SNR in terms of interference link and sensing link parameters [2]
Assumptions for UHF case from [1]
Beacon power = 250 mW (UHF specific)
Beacon Tx antenna gain = 2 dBi (UHF or VHF)
Microphone Rx antenna gain = 2 dBi (UHF)
Interference upfade = 2.5 dB (UHF or VHF)
ΔNF = 0 dB (UHF and VHF)
I/Nmax = 0 dB (UHF and VHF)
Antenna height difference (UHF specific)
16.8 dB rural 10m – 1.5m, P.1546
2.7 dB Hata large city 3m to 1.5m
Stephen Kuffner, Motorola

5. Specific VHF Assumptions
April 2008
Specific VHF Assumptions
Beacon Tx power = 50 mW
Microphone Rx antenna gain = -6.5 dBi
This value was what we were advised to use at the March 2007 Plenary session and appears in [3]
Antenna height difference
14.4 dB rural 10m – 1.5m P.1546
2.5 dB Hata large city 3m – 1.5m
Stephen Kuffner, Motorola

6. April 2008
Link Margin Equation
Antenna-height related path loss clutter parameter Δ
P.1546 rural VHF
– 2.5 – = dB
Modulation & coding has to deliver acceptable PER performance for less than 20 dB Ec/No
WRAN-B: < 0.1% for MSF1 and about 0.5% for MSF2
Hata large city VHF
– 2.5 – = 8.1 dB
Have to deliver PER for Ec/No < 8.1 dB
WRAN-B: about 1.9% for MSF1 and 14% for MSF2
Corresponding UHF numbers from [1] were 3% and 18.8%
Stephen Kuffner, Motorola

7. Conclusions TG1 Packet UHF [1] VHF MSF1 3% 1.9% MSF2 18.8% 14%
April 2008
Conclusions
TG1 Packet
UHF [1]
VHF
MSF1 3%
1.9%
MSF2
18.8%
14%
Stephen Kuffner, Motorola

8. April 2008
References
[1] IEEE /0104r0, “IEEE Packet Error Rates for MSF1 and MSF2,” S. Kuffner, March 2008
[2] IEEE /0059r0, “Beacon Link Margin by Two Methods,” S. Kuffner, February 2008
[3] IEEE /0148r0, “TG1 Link Margin Calculator,” S. Kuffner, March 2007
Stephen Kuffner, Motorola