21 July, 2005

Kyung-Kuk Lee (Orthotron Co. Ltd.)Slide 1

doc.: IEEE 802.15-05-0458-00-004a

Submission

Project: IEEE P802.15 Working Group for Wireless Personal Area NProject: IEEE P802.15 Working Group for Wireless Personal Area Networks (etworks (WPANsWPANs))

Submission Title: [UWB-Chirp]Date Submitted: [21 July, 2005]Source: [Kyung-Kuk Lee] Company [Orthotron Co., Ltd.]Address [709 Kranz Techono, 5442-1 Sangdaewon-dong, Jungwon-gu, Sungnam-si, Kyungki-do, Korea 462-120]Voice:[82-31-777-8198], FAX: [82-31-777-8199], E-Mail:[kyunglee@orthotron.com]Re: []

Abstract: [Time-Frequency Distribution of UWB-Chirp]

Purpose: [Contribution]Notice: This document has been prepared to assist the IEEE P802.15. 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 P802.15.

21 July, 2005

Kyung-Kuk Lee (Orthotron Co. Ltd.)Slide 2

doc.: IEEE 802.15-05-0458-00-004a

Submission

TimeTime--Freq. DistributionFreq. Distributionofof

ChirpChirp--SignalSignal(for optional UWB Chirp-radio)

2005. 7. 21.

Kyung-Kuk Leekyunglee@orthotron.com

21 July, 2005

Kyung-Kuk Lee (Orthotron Co. Ltd.)Slide 3

doc.: IEEE 802.15-05-0458-00-004a

Submission

Chirp vs ImpulseChirp Signal Chirp

t

tCorrelation

Impulse Radio

t

t

Correlation

Properties of ChirpProperties of Chirp--SignalSignal

■ SimilaritiesSpread-Spectrum: BW >> Rb (De-spreading Gain)Impulsive Cross-correlation Pulse-width(Pulse-width of Impulse Train) = (Pulse-width of Cross-Correlation of Chirp) @ Same BWGreat Resolvability of Multi-path

21 July, 2005

Kyung-Kuk Lee (Orthotron Co. Ltd.)Slide 4

doc.: IEEE 802.15-05-0458-00-004a

Submission

■ Co-existence / Interference Mitigation Technique- Orthogonal / Quasi-Orthogonal Signal Set - Ultra-High Processing Gain: UWB-Chirp

■ Interference Susceptibility- Low Cross-Correlation property with Existing Signal

■ Robustness: - Heavy Multi-path Environment: Resolvable in Correlation Domain- SOP: 3 x 2 (Code Division) = 6

■ Low Sensitivity for Component Tolerance- Crystal : ± 40ppm

■ Mobility- Ultra-Wide-Band Chirp: Insensitive for Fading & Doppler Shift- Easy to Maintain of Timing Sync. at the Receiver

Properties of ChirpProperties of Chirp--SignalSignal

21 July, 2005

Kyung-Kuk Lee (Orthotron Co. Ltd.)Slide 5

doc.: IEEE 802.15-05-0458-00-004a

Submission

FCC 05-58 Released: March 11, 2005

Regulatory IssueRegulatory Issue

21 July, 2005

Kyung-Kuk Lee (Orthotron Co. Ltd.)Slide 6

doc.: IEEE 802.15-05-0458-00-004a

Submission

TimeTime--Freq. DistributionFreq. Distribution

F

F

F

Infinite Bandwidth

Wide Bandwidth

Narrow Bandwidth

Impulse

Narrow Pulse

Wide Pulse

21 July, 2005

Kyung-Kuk Lee (Orthotron Co. Ltd.)Slide 7

doc.: IEEE 802.15-05-0458-00-004a

Submission

TimeTime--Freq. DistributionFreq. Distribution

( ) *,2 2

jxW t f x t x t e dωττ τ τ

∞ −

−∞

⎛ ⎞ ⎛ ⎞= + −⎜ ⎟ ⎜ ⎟⎝ ⎠ ⎝ ⎠∫

Wigner – Ville Distribution

Special case of Cohen’s Class

( ) ( ) ( ) : j tGeneralized Chirp x t a t e ϕ=

( )22

2 : j t t

Linear Chirp x t eαπ β γ⎛ ⎞+ +⎜ ⎟⎝ ⎠=

( ) ( )22

2

:

j t t

Short Time Linear Chirp

x t e p tαπ β γ⎛ ⎞+ +⎜ ⎟⎝ ⎠

−

=

t

ω

t

ω

- Mono-component : both amplitude and frequency

- Wide-Bandwidth component

21 July, 2005

Kyung-Kuk Lee (Orthotron Co. Ltd.)Slide 8

doc.: IEEE 802.15-05-0458-00-004a

Submission

ω

t

ω

( ),W t f

Single-Chirp Multiple-ChirpTimeTime--Freq. DistributionFreq. Distribution

( ),W t f

Same Chirp Duration

t

21 July, 2005

Kyung-Kuk Lee (Orthotron Co. Ltd.)Slide 9

doc.: IEEE 802.15-05-0458-00-004a

Submission

Single-Chirp Multiple-Chirpω

tTS 2TS 3TS 4TSt

ω

TS 2TS 3TS 4TS

TimeTime--Freq. DistributionFreq. Distribution

21 July, 2005

Kyung-Kuk Lee (Orthotron Co. Ltd.)Slide 10

doc.: IEEE 802.15-05-0458-00-004a

Submission

TimeTime--Freq. DistributionFreq. DistributionMultiple-ChirpMultiple-Sine

t

ω

TS 2TS 3TS 4TSt

ω

TS 2TS 3TS 4TS

21 July, 2005

Kyung-Kuk Lee (Orthotron Co. Ltd.)Slide 11

doc.: IEEE 802.15-05-0458-00-004a

Submission

-4 -3 -2 -1 0 1 2 3 40

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1Auto-Correlation Power at Full-Chirp Scale for Full-Chirp

-4 -3 -2 -1 0 1 2 3 40

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1Auto-Correlation Power at Full-Chirp Scale for OCDM

Auto-Correlation Property

M=16M=1

Correlation PropertyCorrelation PropertySingle-Chirp Multiple-Chirp

21 July, 2005

Kyung-Kuk Lee (Orthotron Co. Ltd.)Slide 12

doc.: IEEE 802.15-05-0458-00-004a

Submission

- 0 . 2 5 - 0 . 2 - 0 . 1 5 - 0 . 1 - 0 . 0 5 0 0 . 0 5 0 . 1 0 . 1 5 0 . 2 0 . 2 50

0 . 1

0 . 2

0 . 3

0 . 4

0 . 5

0 . 6

0 . 7

0 . 8

0 . 9

1A u t o - C o r r e l a t i o n P o w e r a t S u b - C h i r p S c a l e f o r O C D M

- 6 - 4 - 2 0 2 4 6

x 1 0 - 3

0

0 . 1

0 . 2

0 . 3

0 . 4

0 . 5

0 . 6

0 . 7

0 . 8

0 . 9

1A u t o - C o r r e l a t i o n P o w e r a t S u b - C h i r p S c a l e f o r O C D M

M=16BW: 512MHzTchirp: 250nsec

M=16BW: 512MHzTchirp: 250nsec

Correlation PropertyCorrelation Property

21 July, 2005

Kyung-Kuk Lee (Orthotron Co. Ltd.)Slide 13

doc.: IEEE 802.15-05-0458-00-004a

Submission

- 2 - 1 . 9 5 - 1 . 9 - 1 . 8 5 - 1 . 8- 1

- 0 . 8

- 0 . 6

- 0 . 4

- 0 . 2

0

0 . 2

0 . 4

0 . 6

0 . 8

1

- 1 . 7 5 - 1 . 7 - 1 . 6 5 - 1 . 6 - 1 . 5 5- 1

- 0 . 8

- 0 . 6

- 0 . 4

- 0 . 2

0

0 . 2

0 . 4

0 . 6

0 . 8

1

- 1 . 5 - 1 . 4 5 - 1 . 4 - 1 . 3 5 - 1 . 3- 1

- 0 . 8

- 0 . 6

- 0 . 4

- 0 . 2

0

0 . 2

0 . 4

0 . 6

0 . 8

1

- 1 . 2 5 - 1 . 2 - 1 . 1 5 - 1 . 1 - 1 . 0 5 - 1- 1

- 0 . 8

- 0 . 6

- 0 . 4

- 0 . 2

0

0 . 2

0 . 4

0 . 6

0 . 8

1

- 1 - 0 . 9 5 - 0 . 9 - 0 . 8 5 - 0 . 8- 1

- 0 . 8

- 0 . 6

- 0 . 4

- 0 . 2

0

0 . 2

0 . 4

0 . 6

0 . 8

1

- 0 . 7 5 - 0 . 7 - 0 . 6 5 - 0 . 6 - 0 . 5 5 - 0 . 5- 1

- 0 . 8

- 0 . 6

- 0 . 4

- 0 . 2

0

0 . 2

0 . 4

0 . 6

0 . 8

1

- 0 . 2 5 - 0 . 2 - 0 . 1 5 - 0 . 1 - 0 . 0 5 0- 1

- 0 . 8

- 0 . 6

- 0 . 4

- 0 . 2

0

0 . 2

0 . 4

0 . 6

0 . 8

1

0 0 . 0 5 0 . 1 0 . 1 5 0 . 2 0 . 2 5- 1

- 0 . 8

- 0 . 6

- 0 . 4

- 0 . 2

0

0 . 2

0 . 4

0 . 6

0 . 8

1

0 . 2 5 0 . 3 0 . 3 5 0 . 4 0 . 4 5- 1

- 0 . 8

- 0 . 6

- 0 . 4

- 0 . 2

0

0 . 2

0 . 4

0 . 6

0 . 8

1

0 . 7 5 0 . 8 0 . 8 5 0 . 9 0 . 9 5 1- 1

- 0 . 8

- 0 . 6

- 0 . 4

- 0 . 2

0

0 . 2

0 . 4

0 . 6

0 . 8

1

0 . 5 0 . 5 5 0 . 6 0 . 6 5 0 . 7 0 . 7 5- 1

- 0 . 8

- 0 . 6

- 0 . 4

- 0 . 2

0

0 . 2

0 . 4

0 . 6

0 . 8

1

1 1 . 0 5 1 . 1 1 . 1 5 1 . 2 1 . 2 5- 1

- 0 . 8

- 0 . 6

- 0 . 4

- 0 . 2

0

0 . 2

0 . 4

0 . 6

0 . 8

1

1 . 2 5 1 . 3 1 . 3 5 1 . 4 1 . 4 5 1 . 5- 1

- 0 . 8

- 0 . 6

- 0 . 4

- 0 . 2

0

0 . 2

0 . 4

0 . 6

0 . 8

1

1 . 5 1 . 5 5 1 . 6 1 . 6 5 1 . 7 1 . 7 5- 1

- 0 . 8

- 0 . 6

- 0 . 4

- 0 . 2

0

0 . 2

0 . 4

0 . 6

0 . 8

1

1 . 7 5 1 . 8 1 . 8 5 1 . 9 1 . 9 5 2- 1

- 0 . 8

- 0 . 6

- 0 . 4

- 0 . 2

0

0 . 2

0 . 4

0 . 6

0 . 8

1

0 0.05 0.1 0.15 0.2 0.25-20

-15

-10

-5

0

5

10

15

20

∑

Temporal PAPR : 21.5• Tchirp = 250nsec• Roll-off factor = 0.25

M=16BW: 512MHz

Temporal PAPRTemporal PAPR

21 July, 2005

Kyung-Kuk Lee (Orthotron Co. Ltd.)Slide 14

doc.: IEEE 802.15-05-0458-00-004a

Submission

-5 -4 -3 -2 -1 0 1 2 3 4 5

x 108

-50

-45

-40

-35

-30

-25

-20

-15

-10

-5

0Frequency Response for OCDM

512MHz

Power Spectral DensityPower Spectral Density

21 July, 2005

Kyung-Kuk Lee (Orthotron Co. Ltd.)Slide 15

doc.: IEEE 802.15-05-0458-00-004a

Submission

-3 -2 -1 0 1 2 3

x 108

-10

-9

-8

-7

-6

-5

-4

-3

-2

-1

0Frequency Respons e for OCDM

Spectral PAPR < 1.5 dB

512MHz

Spectral PAPRSpectral PAPR

21 July, 2005

Kyung-Kuk Lee (Orthotron Co. Ltd.)Slide 16

doc.: IEEE 802.15-05-0458-00-004a

Submission

Parameter UWB UWB

peak payload bit rate(Rb) 1000 250 kbps

Signal Bandwidth 512 512 MHz

Average Tx Power(Pt) 0.038 0.038 mW

Average Tx Power(Pt) -14.2 -14.2 dBm

Tx antenna gain(Gt) 0 0 dBi

fc' = sqrt(fminfmax) -10dB 4.20 4.20 GHz

Path loss at 1meter(L1=10n*log10(4pifc'/c)) 44.9 44.9 dB

distance 50 50 m

Path loss Exponent (d<=1m) 2 2

Path loss Exponent (d>1m) 2 2

Path loss at d m(L2=10n*log10(d)) 34.0 34.0

Rx antenna gain (Gr) 0 0 dBi

Rx power(Pr = Pt+Gt+Gr-L1-L2(dB)) -93.1 -93.1 dBm

Average noise power per bit -114.0 -120.0 dBm

Rx Noise Figure(Nf) 7 7 dB

Average noise power per bit(Pn=N+Nf) -107.0 -113.0 dBm

Minimum Eb/No(S) 4.7 4.7 dB r=1/2, k=5

Implementation Loss(I) 3 3 dB

Link Margin (M=Pr-Pn-S-I) 6.2 12.2 dB

Proposed Min. Rx Sensitivity Level -99.3 -105.3

Link BudgetLink Budget

21 July, 2005

Kyung-Kuk Lee (Orthotron Co. Ltd.)Slide 17

doc.: IEEE 802.15-05-0458-00-004a

Submission

■ Temporal PAPR- Maximum Available Power @ 1VP-P:

- Maximum Achievable PAPR @ 1VP-P

■ Spectral PAPR < 1.5dB

■ Sub-Chirp Bandwidth: 32MHz (M=16)- (16MHz Base-Band) Low clock-rate DSP, ADC/DAC

■ Robustness- Multi-path- Doppler Shift

( )21 2 2

2.5 [ ]50MAXP mW= =

-41.3/10

2.5 2.5 65.8 > 21.510 512 0.038MAXPAPR = = ≈

×

SummarySummary