1. May 2008
Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs)
Submission Title: [Resolutions for SC-PHY Modulation and Spreading Comments ]
Date Submitted: [May, 2008]
Source: [Tuncer Baykas] Company [NICT]
Address [Yokosuka,Japan]
Voice:[], FAX: [],
Re: []
Abstract: [Resolutions for SC-PHY Modulation and Spreading Comments ]
Purpose: [Resolutions for SC-PHY Modulation and Spreading Comments ]
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
Tuncer Baykas,NICT

2. Comment 23 12.2.2.3 Code Spreading
May 2008
Comment 23
Code Spreading
To increase robustness in header and payload, Golay and pseudo random binary sequence (PRBS) codes by linear feedback shift register (LFSR) may be applied for code spreading. Three categories of spreading are defined:
1) for spreading factor of 32, Golay codes shall be used,
2) for Class 1 MCSs with spreading factors of 2 and 4, LFSR shall be used
3) for Class 4 MCS with spreading factor of 2, code repetition shall be used.
Code Repetition
For a spreading factor of 2 at code repetition, each data bit shall be repeated twice as spreading.
Tuncer Baykas,NICT

3. Comment 47 Normalization factors of SC modulation schemes
May 2008
Comment 47 Normalization factors of SC modulation schemes
Modulation
Normalization factor
Pi/2 BPSK 1
Pi/2 QPSK
Pi/2Star-8QAM
1/{3+sqrt(3)} where inner circle has radius 1 and outer circle radius has radius 1+sqrt(3)
Pi/2 16QAM
1/sqrt(10)
OOK
sqrt(2)
DAMI
Tuncer Baykas,NICT

4. May 2008
Comment 64
The relative amplitude and phase offset of different SC modulation with relation to pi/2-BPSK/(G)MSK need to be clarified to assure interoperability
Resolution: (We suggest that ) Relative phase offsets are shown clearly in Figure 118 and with the previous resolution for normalization values, amplitudes are clear, we also propose to modify Section to describe the procedure of counter-clockwise pi/2 chip-level rotation for pi/2 BPSK, pi/2 QPSK, pi/2 star-8QAM, and pi/2 16QAM.
Tuncer Baykas,NICT

5. Suggestion of modification
May 2008
Suggestion of modification
pi/2 BPSK in P48
The pi/2 rotation is symbol-level (chip-level in case of spreading) and counter-clockwise, and this rotation shall be processed after preamble data addition and PCES insertion, and starts from the head of preamble with the initial constellation on x-axis.
pi/2 QPSK in P48, pi/2 star 8-QAM in P49, and pi/2 16-QAM in P49
The pi/2 rotation is symbol-level and counter-clockwise rotation, and the rotation process is same as in described in
Tuncer Baykas,NICT