1. July 2008
doc: IEEE c
Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs)
Submission Title: [Responses to comments in document ]
Date Submitted: [11 May, 2008]
Source: [Zhiguo Lai and Abbie Mathew] Company [NewLANS, Inc.]
Address [43 Nagog Park, Suite 200, Acton, MA 01720, USA]
Voice:[ ; ], FAX: [ ],
Re: []
Abstract: []
Purpose: [Responses to questions brought up during April conference calls.]
Notice: This document has been prepared to assist the IEEE P 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 P
Zhiguo Lai, NewLANS

2. doc.: IEEE 802.15-<doc#>
<month year>
doc.: IEEE <doc#>
July 2008
doc: IEEE c
Objective
Comments to following CID numbers in [ c-lb43-comments]
407, 437, 455, 595 and 600
Zhiguo Lai, NewLANS
<author>, <company>

3. doc.: IEEE 802.15-<doc#>
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doc.: IEEE <doc#>
July 2008
doc: IEEE c
Comment to CID # 407
CID#
407
Clause
Page 70
Line 48
I can't figure out what is in Figure 189g. I see three unlabeled dots and the value of Q appears to be always zero.
Please demonstrate how this mode is useful and provide a readable description of it. Otherwise, just remove it.
Response
A new figure along with a mapping table is provided (Also see document [ ]). All variables are defined in the text.
See next slide for the benefits of using DAMI. 00 01 1 10 -1 11
Zhiguo Lai, NewLANS
<author>, <company>

4. doc.: IEEE 802.15-<doc#>
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doc.: IEEE <doc#>
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doc: IEEE c
Comment to CID # 437
CID#
437
 Clause
Page 70
Line 36
DAMI PHY mode is not necessary as the other SC PHY modes cover its usage cases.
DAMI PHY Option should be removed from the specification.
Response
For high data rate applications, DAMI offers low complexity, low power consumption, low phase noise requirements and fast synchronization recovery.
Refer to document [ ] for details.
Zhiguo Lai, NewLANS
<author>, <company>

5. doc.: IEEE 802.15-<doc#>
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doc.: IEEE <doc#>
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doc: IEEE c
Comment to CID # 455
CID#
455
Clause
Page 65
Line 12
Link budget cannot be closed with DAMI.
Remove DAMI from the list of modes.
Response
Power in antenna
0.0
dBm
Tx antenna gain [HPBW 33º]
14.0
dBi
Radiated power
Free space loss at 3.0 m
77.8 dB
Gaseous attenuation
Rx antenna gain [HPBW 33º]
Effective power into receiver
-49.8
Average noise power per bit (N) [3036 Mbps PHY-SAP]
-79.2
Receiver noise figure (Nf)
8.0
Average noise power per bit (Pn=N+Nf)
-71.2
Eb/No [ AWGN BER 10-6, FEC(255, 239)]
11.0
Jitter
1.0
Implementation loss
3.0
Receiver sensitivity
-56.2
Margin
6.4
Zhiguo Lai, NewLANS
<author>, <company>

6. doc.: IEEE 802.15-<doc#>
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July 2008
doc: IEEE c
Comment to CID # 595
CID#
595
Clause
12.2
Page 63
Line
3-12
Why is DAMI encoding defined? The implementation benefits are not clear, and it just complicates the spec.
Please remove the DAMI option.
Response
DAMI encoding is defined because it is part of the constellation mapping. Benefits are explained in Slide 4.
Zhiguo Lai, NewLANS
<author>, <company>

7. doc.: IEEE 802.15-<doc#>
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doc.: IEEE <doc#>
July 2008
doc: IEEE c
Comment to CID # 600
CID#
600 65
9-12
Class 4 SC PHY rates provide few advantages over Class 1, and they have serious drawbacks (e.g., PSD mask, power lost in carrier).
Please remove class 4 devices from the draft.
Response
Class 4 is for simple portable devices. Its implementation is simple, and requires low phase noise, low back off and no DSPs.
DAMI
Signal can fit inside the HSI mask
Power of the DAMI pilots is 25 dB below the integrated signal power - power in pilots is negligible
Refer to document [ ] for more information
OOK
Signal can fit inside the HSI mask – refer to document [ c]
Zhiguo Lai, NewLANS
<author>, <company>