Presentation on theme: "March 2009 Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [Flexible DSSS Proposal] Date Submitted: [01."— Presentation transcript:
1 March 2009Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs)Submission Title: [Flexible DSSS Proposal]Date Submitted: [01 March 2009]Source: [Kuor Hsin Chang, Clint Powell, & Rick Enns] Company [Freescale & Consultant]Address [KC: 890 N. McCarthy Blvd, Suite 120, Milpitas, CA USA]Voice:[KC:+1 (408) , RE: ]Re: Abstract: Proposal for a radio based on a flexible DSSSPurpose: Presented to the g SUN Task Group for considerationNotice: 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 Flexible Direct Sequence Spread Spectrum (DSSS) Proposal March 2009Flexible Direct Sequence Spread Spectrum (DSSS) ProposalKuor Hsin Chang - FreescaleClinton Powell - FreescaleRick Enns - ConsultantMarch, 2009 at Vancouver BC.
3 Flexible DSSS Proposal March 2009Flexible DSSS ProposalProvide configuration options for the number of chips per symbol and bits per symbol while keeping the chip rate constant at 2 McpsOptimize performance for range and data rate – long range at reduced data rate and short range at high data rate
4 Flexible DSSS Examples for 2.4 GHz March 2009Flexible DSSS Examples for 2.4 GHzChip rate (cps)Chips per symbolBits per symbolBit rate (bps)Coding gain (dB)Range extension (freespace)Notes2 Mcps324250,0009.03-present48141,66716.81* 2.45rural application161,000,0003.01* ½urban applicationxy(y/x)*2*10^610*log(x/y)*10^(½*(log(x/y)-log(32/4)))other
5 Compliance to the PAR PA requirement Comments March 2009Compliance to the PARPA requirementCommentsOperation in license exempt bandsDSSS can be applied to the radios for the 868/915/2.4 GHz bandsData rate between 40 and 1,000 kbpsAdjustable data rates available in this rangeOptimal link margins for rural and urban environmentsCoding trades off data rate for rangePrincipally outdoorBasic radio proven1500 octet frame sizeAn extension to the radio synchronizationAt least 3 co-located networksSupportedAt least 1,000 neighbors
6 Advantages of Making DSSS Flexible March 2009Advantages of Making DSSS FlexibleEasy chip design – keeps the chip rate set at what uses. The design of the front end of the current chips can be used.Simple- we know the radio and this is well understood extension to only the digital side.Known coexistence properties – transmissions look the same to other radios.