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Doc.: IEEE 802. 15-10-0240-00-004g Submission Sept 2009 Slide 1Q. Wang [USTB], B. Rofe [BCA] Project: IEEE P802.15 Working Group for Wireless Personal.

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Presentation on theme: "Doc.: IEEE 802. 15-10-0240-00-004g Submission Sept 2009 Slide 1Q. Wang [USTB], B. Rofe [BCA] Project: IEEE P802.15 Working Group for Wireless Personal."— Presentation transcript:

1 doc.: IEEE g Submission Sept 2009 Slide 1Q. Wang [USTB], B. Rofe [BCA] Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [Modifications to CPP, WIA-PA Proposal] Date Submitted: [01 Sept 2009] Source: [Qin Wang ] Company [University of Science & Technology Beijing] [Ben Rolfe] Company [BCA] Address [30 Xueyuan Road, Beijing , China] Voice:[[ ], FAX: [], Re: Merged proposal for TG4g PHY Abstract:Contribution for PHY parameters for the MHz band in China, to harmonize TG4g with WIA-PA. Purpose:Merging PHY proposals for TG4g 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

2 doc.: IEEE g Submission Modifications to CPP WIA-PA Proposal Sept 2009 Q. Wang [USTB], B. Rolfe [BCA]2

3 doc.: IEEE g Submission3 Summary FSK, 2-GFSK, 4-GFSK Modulation –Mod index 1.0/BT=0.5 for GFSK –Mod index 0.5 for FSK (MSK) 200kHz channel spacing –Same as 400MHz/950MHz proposed –Optional 400kHz channel for higher data rate (channel bonding) –Configurable boundary for channel hopping Base symbol rate 100kbps FEC (optional) –Include LDPC –Discussion is ongoing in CPP on best FEC options. Low power features –Transmit power control mechanism in CPP –Modulation agility to be added Use PPDU as per CPP –Not decided on header check field (FEC for PHR) Sept 2009 Q. Wang [USTB], B. Rolfe [BCA]

4 doc.: IEEE g Submission 4 Modulation Parameters Possibly add a lower data rate option of 50kbps for situations where improved range can be achieved with narrower BW filters at the receiver. Alternatively, using R-1/2 FEC on the payload would potentially provide better link margin improvement, and maintain the lower interference vulnerability characteristics of the 100ksps symbol rate. For FSK, use mod index = 0.5 (same as 902MHz band in CPP) Questions/Discussion: 1.Validation of Mod index and BT 2.Usefulness of lower data rate like 50kbps in 200kHz channel Frequency band (MHz) Parameter100 kbps200 kbps400 kbps Channel spacing (kHz) Modulation2-FSK, 2-GFSK4GFSK Mod. Index, BT1.0, , 0.5 Sept 2009 Q. Wang [USTB], B. Rolfe [BCA]

5 doc.: IEEE g Submission5 Channel Spacing ` Low boundary of Channel High boundary of Channel Note. Considering the possibility of overlap partially with broadcast TV in MHz, the “low boundary of channel” and “high boundary” are used to mark the boundary for channel hopping Channel bonding Sept 2009 Q. Wang [USTB], B. Rolfe [BCA]

6 doc.: IEEE g Submission6 FEC—LDPC as a option –The LDPC Code proposal is mainly based on the LDPC Code scheme in IEEE n standard. –The Code Rate, Code Length and Parity Check Matrices in this proposal are same as those used in the IEEE n standard. –According to the modulation scheme by FSK-CPP subgroup in the IEEE g, the encoding process is modified based on LDPC Code encoding process in n standard. Reference. LDPC_Code_Proposal_for 15.4g.doc Sept 2009 Q. Wang [USTB], B. Rolfe [BCA]

7 doc.: IEEE g Submission7 Energy Efficiency---Modulation Agility PHY provides flexibility via simple modulation option System will use modulation that is best suited for the target environment and link. Enables variable bit rates. Higher bit rates can mean lower energy (shorter transmission time) Switch modulation formats between FSK, 2- GFSK and 4GFSK. Sept 2009 Q. Wang [USTB], B. Rolfe [BCA]


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