July 2008 doc: IEEE 802.15-0550-00-003c Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [Responses to comments in document 08-0432-05] 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:[1-413-313-4172; 1-617-283-1363], FAX: [1-978-849-8005], E-Mail:[zlai@newlans.com; amathew@newlans.com] Re: [] Abstract: [] Purpose: [Responses to questions brought up during April conference calls.] 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. Zhiguo Lai, NewLANS

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> July 2008 doc: IEEE 802.15-0550-00-003c Objective Comments to following CID numbers in [15-08- 0432-05-003c-lb43-comments] 407, 437, 455, 595 and 600 Zhiguo Lai, NewLANS <author>, <company>

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> July 2008 doc: IEEE 802.15-0550-00-003c Comment to CID # 407 CID# 407 Clause 12.2.2.1.6 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 [08-0311-02]). 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>

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> July 2008 doc: IEEE 802.15-0550-00-003c Comment to CID # 437 CID# 437  Clause 12.2.2.1.6   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 [07-0685-01] for details. Zhiguo Lai, NewLANS <author>, <company>

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> July 2008 doc: IEEE 802.15-0550-00-003c Comment to CID # 455 CID# 455 Clause 12.2.1.1 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>

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> July 2008 doc: IEEE 802.15-0550-00-003c 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>

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> July 2008 doc: IEEE 802.15-0550-00-003c Comment to CID # 600 CID# 600 12.1.1.1 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 [15-08-0278-00] for more information OOK Signal can fit inside the HSI mask – refer to document [15-08-0588-00-003c] Zhiguo Lai, NewLANS <author>, <company>