1. doc.: IEEE 802.15-<doc#>
<month year>
doc.: IEEE <doc#>
November, 2005
Project: IEEE Study Group for Wireless Personal Area Networks (WPANs)
Submission Title: [An Alternativetive Concatenated Code Option for TG4a]
Date Submitted: [November 2005]
Source: [Shahriar Emami and Celestino A. Corral]:
Company1 [Freescale Semiconductor]
Address [Freescale Semiconductor, Inc Broken Sound Pkwy., N.W. Suite 1
Boca Raton, FL  ]
Voice: [(561) ]
Re: [ a]
Abstract: [Captures the characteristics of TG4a coding schemes.]
Purpose: [To assist designers in coding selection]
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
Shahriar Emami, Freescale Semiconductor
<author>, <company>

2. Option I: Modulation [IEEE 15-05-617-01-004a]
November, 2005
Option I: Modulation [IEEE a]
2 PPM
Shahriar Emami, Freescale Semiconductor

3. Option II: Modulation [IEEE 15-05-617-01-004a]
November, 2005
Option II: Modulation [IEEE a]
4 PPM
Shahriar Emami, Freescale Semiconductor

4. Option III: Modulation [IEEE 15-05-617-01-004a]
November, 2005
Option III: Modulation [IEEE a]
8 PPM
Shahriar Emami, Freescale Semiconductor

5. Non-Coherent Receiver Performance in AWGN
November, 2005
Non-Coherent Receiver Performance in AWGN
Options I,II and III achieve EbNo of 12.5, 9.8 and 8 dB for 1% PER.
Option III is superior to others
Shahriar Emami, Freescale Semiconductor

6. Option III-b: Coding & Performance [IEEE 15-05-617-01-004a]
November, 2005
Option III-b: Coding & Performance [IEEE a]
Among all options, option III-b achieves the best performance
Non-coherent Rx. achieves 1% PER at EbNo = 5.75 dB
Shahriar Emami, Freescale Semiconductor

7. November, 2005
RS Code Block Size
In many sensor networks very few information bits are transmitted at a time.
Short packets need to be stuffed with zeros to reach minimum RS code block size.
RS code would be wasteful for these applications.
Shahriar Emami, Freescale Semiconductor

8. November, 2005
Option III-c
Replace RS (51,43) code with a rate 5/6 convolutional code
- Rs code rate 0.843
- Convolutional code rate 0.833
Rate 5/6 convolutional code can be obtained by puncturing rate ½ code with puncturing matrix P=[ 10100;11011 ].
Shahriar Emami, Freescale Semiconductor

9. Non-Coherent Receiver Performance of III-c in AWGN
November, 2005
Non-Coherent Receiver Performance of III-c in AWGN
Hard decision III-c performance is shown above
With soft Decision III-c performance will be as good as III-b
Shahriar Emami, Freescale Semiconductor