1. Submission Title: [Some Answers about MPSK PHY layer Proposal ]
Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs)
Submission Title: [Some Answers about MPSK PHY layer Proposal ]
Date Submitted: [Sept. 2007]
Source: [Liang Li, Chen Yang Yang , T.T. Liu, Pei Liu, Dixon Paul] Company: [Vinno Technologies Inc, BUAA, Hisilicon Inc. ]
Address: [Suite 402, Building D, No.2 Shangdi Xinxi Lu, Beijing , China]
Voice:[ ], FAX: [ ]
E−Mail:
Re: [ c]
Abstract: [ ]
Purpose: [To encourage discussion in c]
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
Submission
Liang Li (Vinno)

2. .4c Currently Discussed Proposals
Atmel, Freescale, Integration Associates
Joint proposal rebanding 900 MHz OQPSK PHY down to MHz band (4 channels) & change pulse shaping filter
Vinno, BUAA and Huawei :
New MPSK PHY,
Compatible to management and data structures, definitions of IEEE Phy layer
RC shaping filter.
The difference on
MPSK Modulation, not OQPSK
PN Code table
Pre-processing.
Submission
Liang Li (Vinno)

3. CWPAN Major PHY D’s On the PN code, the detail Difference are:
PN Codes are circular shifted by 1 instead of by 2
PN Codes 8-15 are not complex conjugates of PN Codes 0-7
PN Codes are floating-point numbers instead of binary numbers
PN Codes are not DC free
Based on technical input/guidance from IEEE c changes were made by the CWPAN to remove the DC offset, by addition of a DC removal block
Submission
Liang Li (Vinno)

4. CWPAN Major PHY D’s (cont’d.)
Mapping Data to PN Code
The sentence is misunderstanding: “The same mapping is not used for preamble, SFD and data payload”
The same mapping is used for Preamble, SFD and data Payload.
The SFD is the preamble through pre-processed after the same mapping.
Modulation
M-ary PSK, Non Constant Envelope, Crest fact is 2.89dB.
As the OQPSK + RC pulse filter, waveform is not Constant Envelope. Crest fact is about 1.0dB.
Submission
Liang Li (Vinno)