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CJK-IMT28-023 . Statistical Analysis for Out-Of-band Emission level of IMT UE. LIM, Euntaek ([email protected]) CJK IMT 28 Xi’an ( 西安 ), China June 2 ~ 3, 2011. Interference scenario. Interference from IMT UE to DTV Receiver 5MHz Guard band: between IMT UE and ATSC Receiver - PowerPoint PPT Presentation
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Realizing Green ICT Dream with TTA
Statistical Analysis for Out-Of-band Emission level of IMT UE
LIM, Euntaek([email protected])
CJK IMT 28Xi’an ( 西安 ), China
June 2 ~ 3, 2011
CJK-IMT28-023
22/14CJK IMT 28, Xi’an, China
Interference from IMT UE to DTV Receiver5MHz Guard band: between IMT UE and ATSC Receiver9MHz Guard band: between IMT UE and DVB-T Receiver
Interference scenario
※ FDD option of AWG harmonized frequency allocation
Interference
33/14CJK IMT 28, Xi’an, China
Simulation Parameters
• DTV and LTE UE systemParameters LTE Value CommentsCell layout Hexagonal gridScenario Urban Macro ITU-R M.2135
Number of UE per km2 20 UEsInter-site distance 500mDuplex method FDD
UE max transmit power 23dBmUplink scheduler PF PF factor = 1.2
Uplink power control Alpha = 0.8 3GPP TS 36.213Parameters DTV Value Comments
Transmitter power 92.16dBm FCC CFR 47. Part 75Transmitter antenna height 365m FCC CFR 47. Part 75
Separate distance between DTV receivers 50m
DTV receiver’s location Fixed grid with constant separation
DTV type ATSC 8-VSD
44/14CJK IMT 28, Xi’an, China
Simulation environment
• Configuration of LTE system
• Path loss model
Distance range Value Comments
IMT UE → DTV Rx Sub-urban Hata model ERC Report 68
DTV Tx → IMT BS P.1546 ITU-R Rec.
55/14CJK IMT 28, Xi’an, China
Simulation methodology
• Flowchart for calculating DTV outage
LTE UE
LTE Base Station
Power Control
Algorithm
Scheduling Algorithm
Determine scheduled UEs and
compute Tx power
DTV Rx
DTV Tx
Compute level of LTE UE’s
interference
Compute level of DTV received
signal
LTE UE’s interference> DTV received signal ?
OutageCompute
outage probability
true
LTE System
DTV System
Pathloss Model
(P.1546)
Pathloss Model (Suburban-
Hata)
66/14CJK IMT 28, Xi’an, China
Simulation result (1/5)• DTV outage probability according to ACIR and ATSC Coverage
77/14CJK IMT 28, Xi’an, China
Simulation result (2/5)
• DTV Outage according to ACIR of LTE UE
Increasing DTV Outage based on no interference from LTE UE
5MHz LTE UE ACIR 34.9dB (Mea-surement)
39dB(5MHz GB,
Spec.)42dB
(9MHz GB, Spec)
DTV outage increasing (68km) 1.8% (1.5↑) 1.2% (1.0↑) 1.0% (0.7↑)DTV outage increasing (96km) 45.8% (5.2↑) 43.8% (3.1↑) 42.9% (2.3↑)
88/14CJK IMT 28, Xi’an, China
Simulation result (3/5)
• DTV Outage according to DTV Coverage with given ACIR
Increasing DTV outage based on no interference
DTV Coverage(ATSC Rx Sensitivity level)
68Km(-69dBm)
85Km(-78dBm)
97km(-84dBm)
DTV outage increasing
ACIR: 39dB (5MHz GB) 1.1%(0.9↑) 17.1%(2.3↑) 25.7%(2.7↑)
ACIR: 42dB (9MHz GB) 1.0%(0.7↑) 16.1%(1.9↑) 45.2%(2.3↑)
99/14CJK IMT 28, Xi’an, China
Simulation result (4/5)• DTV Outage with Fixed power of LTE UE based on 3GPP Spec.
– LTE UE spectrum mask: -25dBm/MHz (ACLR: 41dB)– LTE UE Coexistence emission: -50dBm/MHz (ACLR: 66dB)
DTV Coverage(ATSC Rx signal level)
68Km(-69dBm)
85Km(-78dBm)
97km(-84dBm)
LTE UEEmission
level
-25dBm/MHz 5.9% (5.6) 30.8% (16.6) 60.6% (17.7)-50dBm/MHz 0.7% (0.5) 15.1% (0.9) 44.0% (1.1)
1010/14CJK IMT 28, Xi’an, China
Simulation result (5/5)
• DTV Outage for the density of LTE UE– DTV outage slightly increases when the density of LTE UE increases
5 Users/km2 to 20 User/Km2 ( DTV Coverage: 97km)
1111/14CJK IMT 28, Xi’an, China
Summary
• DTV Outage based on APT band plan– No power control
• All LTE UEs emit the same signal level in DTV in band based on 3GPP LTE UE Spectrum emission mask
– Power control• LTE UE emits the signal level in DTV in band based on 3GPP LTE UE ACLR
LTE UE emission levelATSC Coverage (km)
68Km(-69dBm)
85Km(-78dBm)
97km(-84dBm)
No power control
-25dBm/MHz 5.9% (5.6↑) 30.8% (16.6↑)
60.6% (17.7↑)
-50dBm/MHz 0.7% (0.5↑) 15.1% (0.9↑)
44.0% (1.1↑)
Power control
ACIR: 39 dB (5MHz GB, Spec) 1.2% (1.0↑) 14.7%
(2.3↑)43.5% (2.8↑)
ACIR: 42 dB (9MHz GB, Spec) 1.0% (0.7↑) 14.1%
(1.7↑)42.8% (2.0↑)
ACIR: 54 dB (6MHz GB, Measurement) 0.6% (0.3↑) 12.8%
(0.4↑)41.3% (0.6↑)
No interference 0.4% 14.2% 42.9%
1212/14CJK IMT 28, Xi’an, China
Annex
1313/14CJK IMT 28, Xi’an, China
Comparison with measurement and calculation
• DTV sensitivity level when LTE UE causes interference– Measurement result – Calculation result with LTE UE Tx ACLR (It assumes that ATSC ACS is much more than LTE UE ACLR)
※ Measured LTE UE ACLR LTE UE channel
Bandwidth ACLR 1 ACLR 2
3MHz 51 dB 69.3 dB5MHz 34.9dB 54.1 dB
1414/14CJK IMT 28, Xi’an, China
Simulation Parameters
• Measurement result of minimum sensitivity level of DTV due to interference from LTE UE in US band plan
※ Measured LTE UE ACLR LTE UE channel
Bandwidth ACLR 1 ACLR 2
3MHz 51 dB 69.3 dB5MHz 34.9dB 54.1 dB
