1. March 2003
Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs)
Submission Title: [PHY Proposal for the IEEE a standard]
Date Submitted: [ “3 March, 2003”]
Source: [Do-Hoon Kwon] Company [Samsung Electronics Co., Ltd. (SAIT)]
Address [San14-1 Nongseo-Ri Kiheung-Eup, Yongin , Korea]
Voice:[ ], FAX: [ ],
Re: [IEEE a Call For Proposal]
Abstract: [This document proposes Samsung Electronics Co., Ltd.(SAIT)’s PHY proposal for the IEEE a high rate alternate PHY standard.]
Purpose: [PHY proposal for the IEEE a standard.]
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
Do-Hoon Kwon, Samsung Electronics Co., Ltd.(SAIT)

2. Samsung Electronics Co., Ltd.(SAIT)’s PHY Proposal for IEEE 802.15.3a
March 2003
Samsung Electronics Co., Ltd.(SAIT)’s PHY Proposal for IEEE a
Do-Hoon Kwon
Do-Hoon Kwon, Samsung Electronics Co., Ltd.(SAIT)

3. doc.: IEEE 802.15-<doc#>
<month year>
doc.: IEEE <doc#>
March 2003
Objective
Effective use of the UWB spectrum
Robust and scalable system design
Immunity to narrowband interference
Low-cost implementation
Do-Hoon Kwon, Samsung Electronics Co., Ltd.(SAIT)
<author>, <company>

4. Features The proposed system
March 2003
Features
The proposed system
meets all the system performance requirements
uses multi-band frequency plan
transmits and receives Gaussian wavelets
employs DPSK+PPM modulation
can reject narrowband interferers with ease
features low-complexity transceiver structures
does not consume excessive power
Do-Hoon Kwon, Samsung Electronics Co., Ltd.(SAIT)

5. Samsung Electronics Co., Ltd.(SAIT) will be cooperating with:
March 2003
a Early Merge Work
Samsung Electronics Co., Ltd.(SAIT) will be cooperating with:
Discrete Time Communications
FOCUS Enhancements
General Atomics
Intel
Philips
Time Domain
Wisair
Objectives:
“Best” Technical Solution
ONE Solution
Excellent Business Terms
Fast Time To Market
We encourage participation by any party who can help us reach our goals.
Do-Hoon Kwon, Samsung Electronics Co., Ltd.(SAIT)

6. Frequency plan Multi-band frequency plan: 10 sub-bands of 700MHz width
March 2003
Frequency plan
Multi-band frequency plan:
10 sub-bands of 700MHz width
The center frequencies are integer multiples of 700MHz
fL=3.15GHz and fH=10.15GHz
Spectrum reaches <-10dB at 3.1 & 10.6GHz
Do-Hoon Kwon, Samsung Electronics Co., Ltd.(SAIT)

7. Time domain waveform Pulse width in time
March 2003
Time domain waveform
0.3162
0.7071
2.1ns
1.15ns
Pulse width in time
1.15ns (-3dB), 2.1ns (-10dB)
Zero crossings are dictated by the sub-band center frequency
Do-Hoon Kwon, Samsung Electronics Co., Ltd.(SAIT)

8. Time frame structure Single time frame comprises
March 2003
Time frame structure
Two time slots of 2.5ns duration
66.4ns of guard time for multi-path immunity 5
71.4
t (ns)
Single time frame comprises
Two time slots of duration 2.5ns each
Each slot can hold a single Gaussian wavelet
Followed by 66.4ns of guard time
Significant multi-path components are expected to be contained in the guard time
The symbol period is 71.4ns (optional 35.7ns)
The symbol rate is 14Msps per band (optional 28Msps)
Do-Hoon Kwon, Samsung Electronics Co., Ltd.(SAIT)

9. Wavelet positions and corresponding bits
March 2003
Modulation
Wavelet positions and corresponding bits X0 X1
2-level PPM 5
t (ns)
X00
X01
X11
X10
4-level PPM(optional) 10
t (ns)
DPSK+PPM modulation
Pulse Position Modulation part
One Gaussian wavelet takes one of the two time slots  determines one bit
2-level PPM (optional 4-level PPM)
Do-Hoon Kwon, Samsung Electronics Co., Ltd.(SAIT)

10. Modulation (continued)
March 2003
Modulation (continued)
Wavelet polarity 00
No change in polarity t X0 t 11
Change in polarity t
DPSK+PPM modulation
Differential Bi-Phase Shift Keying part
The first bit is determined by polarity change of consecutive Gaussian wavelets
DPSK allows non-coherent detection
Do-Hoon Kwon, Samsung Electronics Co., Ltd.(SAIT)

11. Multi-band transmission
March 2003
Multi-band transmission
Pulse position
Band a
Band b
Band c
Band d
Band e 10 20 30 40 50 60 70 80 t
Multiple bands are simultaneously used for higher throughputs
Wavelet transmission in different bands are skewed in time
Time-skewing may reduce transmitter complexity
A minimum number of PLLs are required
Do-Hoon Kwon, Samsung Electronics Co., Ltd.(SAIT)

12. Data Throughput (PRF=14MHz)
March 2003
Data Throughput (PRF=14MHz)
Do-Hoon Kwon, Samsung Electronics Co., Ltd.(SAIT)

13. Data Throughput (PRF=28MHz)
March 2003
Data Throughput (PRF=28MHz)
Do-Hoon Kwon, Samsung Electronics Co., Ltd.(SAIT)

14. March 2003
Link Budget
Do-Hoon Kwon, Samsung Electronics Co., Ltd.(SAIT)

15. Coexistence with narrowband interferer
March 2003
Coexistence with narrowband interferer
IEEE a is the strongest narrowband interferer
Coexistence mode
Do not use band #3 and band #4 for coexistence with IEEE a WLAN devices
Channel allocation can be dynamically assigned depending on channel monitoring results
Do-Hoon Kwon, Samsung Electronics Co., Ltd.(SAIT)

16. Regulatory Impact Geopolitical scope
March 2003
Regulatory Impact
Geopolitical scope
Multi-band usage pattern can be dynamically configured depending on location of usage
Do-Hoon Kwon, Samsung Electronics Co., Ltd.(SAIT)

17. Scalability Data rates Frequencies of operation Power consumption
March 2003
Scalability
Data rates
110Mbps is supported by six-band transmission
Higher data rates are supported by multi-band parallel transmission
504Mbps: 4-level PPM+DPSK, 9 band transmission, PRF=28MHz
Lower data rates are supported by single-band transmission
19Mbps: 2-level PPM+DPSK, 1 band transmission, PRF=14MHz
Frequencies of operation
As the UWB frequency band expands, more sub-bands can be defined
Power consumption
For low data rates, single-band mode operation reduces power consumption
Do-Hoon Kwon, Samsung Electronics Co., Ltd.(SAIT)

18. Multi-Path Immunity Sufficient guard time
March 2003
Multi-Path Immunity
Received
signal
Desired signals
Multi-path interference 5
71.4
76.4
t (ns)
Sufficient guard time
ns provide immunity to multi-path interference components
Do-Hoon Kwon, Samsung Electronics Co., Ltd.(SAIT)

19. General Solution Criteria
March 2003
General Solution Criteria
Do-Hoon Kwon, Samsung Electronics Co., Ltd.(SAIT)

20. PHY Solution Criteria March 2003
Do-Hoon Kwon, Samsung Electronics Co., Ltd.(SAIT)

21. Conclusions The system uses The system features
March 2003
Conclusions
The system uses
10 sub-bands of 700MHz bandwidth
Gaussian wavelets
DPSK+PPM modulation
The system features
high scalability in data rates
coexistence with narrowband interference
non-coherent detection scheme (for receivers)
small number of frequency generators
immunity to multi-path interference
Do-Hoon Kwon, Samsung Electronics Co., Ltd.(SAIT)