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March 2007
Kyutae Lim, GEDC
Slide 1
doc.: IEEE 0240r0
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 [email protected].
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 +1-404-385-6008 [email protected]
Jongmin Park Georgia Institute of Technology USA +1-404-385-6008 [email protected]
Jeong Suk Lee Samsung Electro-Mechanics Korea +82-31-210-3217 [email protected]
Chang Ho Lee Samsung Electro-Mechanics Korea +82-31-210-3217 [email protected]
Haksun Kim Samsung Electro-Mechanics Korea +82-31-210-3217 [email protected]
Kihong Kim Samsung Electro-Mechanics Korea +82-31-210-3217 [email protected]
doc.: IEEE 0240r0
Submission
MRSS System Architecture
doc.: IEEE 0240r0
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 0240r0
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 vv
f v
v
2 21( ) exp ln(2 ) exp ln(2 )
10log( ) 10log( ) 10log( )X
x xf x
e e e
210log ( ), 0.5772 : Euler-Mascheroni constant
exp( )x dBV
10 log( )5.57( )
6x
edB
March 2007
Kyutae Lim, GEDC
Slide 5
doc.: IEEE 0240r0
Submission
Noise Distribution (2)
• Averaging of log-domain processing by NAVG
2 2, ( ) exp ln(2 ) exp ln(2 )
10log( ) 10log( ) 10log( )AVG AVG AVG
X AVG
N N Nf x x x
e e e
10 log( ) 5.57( ).
6AVG
AVG AVG
edB
N N
AVG 10log2 2
exp()
(dBV ),0.5772 : Euler Mascheroni constant
March 2007
Kyutae Lim, GEDC
Slide 6
doc.: IEEE 0240r0
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 0240r0
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 0240r0
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 N
AVG
p dBmN
March 2007
Kyutae Lim, GEDC
Slide 9
doc.: IEEE 0240r0
Submission
Probability of Misdetection, PMD
Continuous Wave ATSC (8-VSB)
March 2007
Kyutae Lim, GEDC
Slide 10
doc.: IEEE 0240r0
Submission
Phase Noise Effect on the Threshold Level
window of fw = 100 kHz with 600-MHz modulation
Case 1: No Phase noise
Case 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 0240r0
Submission
Spectrum Sensing IC Development
• Proposed MRSS scheme is being implemented in CMOS process.
• First Sensing IC has been fabricated Nov 2006 and in the middle of measurement process.
• Second phase IC design is to be submitted by the end of May 2007.
• Any updated result on IC will be presented at upcoming meeting.
doc.: IEEE 0240r0
Submission
CMOS Implementation of MRSS
QuickTime™ and aTIFF (Uncompressed) decompressor
are needed to see this picture.
QuickTime™ and aTIFF (Uncompressed) decompressor
are needed to see this picture.
QuickTime™ and aTIFF (Uncompressed) decompressor
are needed to see this picture.
QuickTime™ and aTIFF (Uncompressed) decompressor
are needed to see this picture.
Pulse generator
DAC
Correlator : Multiplier + Integrator
March 2007
Kyutae Lim, GEDC
Slide 13
doc.: IEEE 0240r0
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
