March 2007

Kyutae Lim, GEDC

Slide 1

doc.: IEEE 802.22-07-0143-00-0000

Submission

Simulation on Performance of Multi Resolution Spectrum Sensing (MRSS)

Section 11.3.2.2 in IEEE P802.22/D0.2 Draft Standard for WRAN

Authors:

Notice: This document has been prepared to assist IEEE 802.22. 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 grants a free, irrevocable license to the IEEE to incorporate material contained in this contribution, and any modifications thereof, in the creation of an IEEE Standards publication; to copyright in the IEEE’s name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEE’s sole discretion to permit others to reproduce in whole or in part the resulting IEEE Standards publication. The contributor also acknowledges and accepts that this contribution may be made public by IEEE 802.22.

Patent Policy and Procedures: The contributor is familiar with the IEEE 802 Patent Policy and Procedures http://standards.ieee.org/guides/bylaws/sb-bylaws.pdf including the statement "IEEE standards may include the known use of patent(s), including patent applications, provided the IEEE receives assurance from the patent holder or applicant with respect to patents essential for compliance with both mandatory and optional portions of the standard." Early disclosure to the Working Group of patent information that might be relevant to the standard is essential to reduce the possibility for delays in the development process and increase the likelihood that the draft publication will be approved for publication. Please notify the Chair Carl R. Stevenson as early as possible, in written or electronic form, if patented technology (or technology under patent application) might be incorporated into a draft standard being developed within the IEEE 802.22 Working Group. If you have questions, contact the IEEE Patent Committee Administrator at patcom@iee.org.

This document provides simulation results for the proposed spectrum sensing scheme in Section 11.3.2.2. This document provides recommended remedy for comment CID #164.

Name Company Address Phone email

Kyutae Lim Georgia Institute of Technology USA +1-404-385-6008 ktlim @ece.gatech.edu

Joy Laskar Georgia Institute of Technology USA 404-385-6008 joy.laksar@ece.gatech.edu

Jongmin Park Georgia Institute of Technology USA +1-404-385-6008 jmpark @ece.gatech.edu

Jeong Suk Lee Samsung Electro-Mechanics Korea +82-31-210-3217 js0305.lee@samsung.com

Chang Ho Lee Samsung Electro-Mechanics Korea +82-31-210-3217 changholee@samsung.com

Haksun Kim Samsung Electro-Mechanics Korea +82-31-210-3217 hskim@samsung.com

Seongsoo Lee Samsung Electro-Mechanics Korea +82-31-210-3217 sslee.rf@samsung.com

Kihong Kim Samsung Electro-Mechanics Korea +82-31-210-3217 kh607.kim@samsung.com

doc.: IEEE 802.22-07-0143-00-0000

Submission

MRSS System Architecture

doc.: IEEE 802.22-07-0143-00-0000

Submission

MRSS Performance : Scalable Resolution

Input Signals

Modul-ation Bandwidth

CarrierFreq. Power Remark

FM 200 KHz 170 MHz - 65 dBmWireless

Mic.

OFDM 7 MHz 333 MHz - 37 dBm DVB-T

8-VSB 6 MHz 600 MHz - 58 dBm ATSC

Simulation Parameters

Sparse MRSS Precise MRSS

VCO Span 50 ~ 850 MHz 50 ~ 850 MHz

fsweep 20 MHz 2 MHz

Bw 20 MHz 2 MHz

Ttotal 2.05 μsec 200.5 μsec

RF Signal Spectrum Sparse MRSS Precise MRSS

March 2007

Kyutae Lim, GEDC

Slide 4

doc.: IEEE 802.22-07-0143-00-0000

Submission

Noise Distribution (1)

• The envelope voltage of white Gaussian Noise– Linear-domain processing: Rayleigh Distribution

– Log-domain processing: Log-compressed Rayleigh Distribution

2

2 2exp , if 0( ) 2

0 , if 0v

v v vf v

v

2 21( ) exp ln(2 ) exp ln(2 )10log( ) 10 log( ) 10log( )X

x xf xe e e

210log ( ), 0.5772 : Euler-Mascheroni constantexp( )x dBV

10 log( ) 5.57( )6x

e dB

March 2007

Kyutae Lim, GEDC

Slide 5

doc.: IEEE 802.22-07-0143-00-0000

Submission

Noise Distribution (2)

• Averaging of log-domain processing by NAVG

2 2, ( ) exp ln(2 ) exp ln(2 )

10 log( ) 10log( ) 10log( )AVG AVG AVG

X AVG

N N Nf x x x

e e e

10 2log ( ), 0.5772 : Euler-Mascheroni constantexp( )AVG

AVG

dBVN

10 log( ) 5.57 ( ).6AVG

AVG AVG

e dBN N

March 2007

Kyutae Lim, GEDC

Slide 6

doc.: IEEE 802.22-07-0143-00-0000

Submission

cos Hann Window

WindowHighest Sidelobe

(dBc )Equiv. Noise

BW (*fw)3-dB BW

(*fw)6-dB BW

(*fw)

-23 1.23 1.20 1.65

-32 1.50 1.44 2.00

-39 1.73 1.66 2.32

-47 1.94 1.86 2.59

cos 22wf t

2cos 22wf t

3cos 22wf t

4cos 22wf t

March 2007

Kyutae Lim, GEDC

Slide 7

doc.: IEEE 802.22-07-0143-00-0000

Submission

Noise Distribution (3)• Detected Noise with window

Case 1: fw = 100 kHz, NAVG = 1

Case 2: fw = 100 kHz, NAVG = 10

Case 3: fw = 1 MHz, NAVG = 10

4cos ( )wf t

March 2007

Kyutae Lim, GEDC

Slide 8

doc.: IEEE 802.22-07-0143-00-0000

Submission

Sensing Threshold Level• With the noise PDF, find the point when CDF = 1 – PFA

– With PFA = 0.1,

AVGN

N

N

THP

Theoretical Value

from (20)Simulation Error (dB)

(dBm) All -113.63 -113.62 -0.01

(dB)

110

1001000

5.571.760.570.18

5.551.740.540.17

-0.02-0.02-0.03-0.01

(dBm)

110

1001000

-107.50-111.69-113.02-113.44

-107.40-111.40-112.80-113.40

0.100.290.220.04

window, fw = 100 kHz, PFA = 0.14cos ( )wf t

174 10log 2.51 ( ).N NBWNF f dBm

6.1265 ( )TH NAVG

p dBmN

March 2007

Kyutae Lim, GEDC

Slide 9

doc.: IEEE 802.22-07-0143-00-0000

Submission

Probability of Misdetection, PMD

Continuous Wave ATSC (8-VSB)

March 2007

Kyutae Lim, GEDC

Slide 10

doc.: IEEE 802.22-07-0143-00-0000

Submission

Phase Noise Effect on the Threshold Level

window of fw = 100 kHz with 600-MHz modulation

Case 1: No Phase noiseCase 2: Phase noise of -80 dBc/Hz at 20 kHz, -150 dBc/Hz at 6 MHz and -170 dBc/Hz at 60 MHz Case 3: Phase noise of -80 dBc/Hz at 20 kHz, -140 dBc/Hz at 6 MHz and -160 dBc/Hz at 60 MHz

4cos ( )wf t

March 2007

Kyutae Lim, GEDC

Slide 11

doc.: IEEE 802.22-07-0143-00-0000

Submission

References

1. http://www.ieee802.org/22/Meeting_documents/2006_Sept/22-06-0028-10-0000-Spectrum-Sensing-Simulation-Model.doc

2. F. J. Harris, “On the Use of Windows for Harmonic Analysis with the Discrete Fourier Transform,” Proceedings of the IEEE, vol. 66, No. 1, Jan 1978

3. Agilent Application Note (AN) 1303, “Spectrum Analyzer Measurements and Noise”

4. D. Kaplan and Q Ma, “On the statistical characteristics of log-compressed Rayleigh signals: Theoretical formulation and experimental results,” Journal of the Acoustical Society of America, Vol. 95, Iss. 3, pp. 1396-1400, Mar 1994