Download - Supelec lte 4G - digital terrestrial tv (DTT) coexistence update - 2013

LTE / DVB Coexistencefinding compromise

towardsInternet of Everything

Regulatory & Industry AllianceState-of-Art (SoA) / Status

Update Q1’2013

Thierry Lestable (MS’97, Ph.D’03)Technology & Innovation Manager, Sagemcom

© Thierry Lestable, 20122

Disclaimer

• Besides Sagemcom SAS’, many 3rd party copyrighted material is reused within this brief tutorial under the ‘fair use’ approach, for sake of educational purpose only, and very limited edition.

• As a consequence, the current slide set presentation usage is restricted, and is falling under usual copyright usage.

• Thanks for your understanding!

LTE/DVB Coexistence Issues

Source: Bundesnetzagentur

3GPPUser Equipment (UE) / Mobile Terminal (MT) Requirements

3GPP Requirements: UE

Spectrum emission limit (dBm)/ Channel bandwidth

∆fOOB (MHz)

1.4 MHz

3.0 MHz

5 MHz

10 MHz

15 MHz

20 MHz

Measurement bandwidth

± 0-1 -10 -13 -15 -18 -20 -21 30 kHz ± 1-2.5 -10 -10 -10 -10 -10 -10 1 MHz

± 2.5-2.8 -25 -10 -10 -10 -10 -10 1 MHz ± 2.8-5 -10 -10 -10 -10 -10 1 MHz ± 5-6 -25 -13 -13 -13 -13 1 MHz

± 6-10 -25 -13 -13 -13 1 MHz ± 10-15 -25 -13 -13 1 MHz ± 15-20 -25 -13 1 MHz ± 20-25 -25 1 MHz

Spectrum Emission Mask (SEM)

Channel bandwidth

1.4MHz

3.0MHz

5MHz

10MHz

15MHz

20MHz

∆fOOB (MHz) 2.8 6 10 15 20 25

Source: 3GPP TS 36.101 V11.3.0 (2012-12)

3GPP Mobile (UE) Requirements - Example

(P=23dBm)

Thanks to Dr.M.Lalam for curves

3GPP SEM – Additional Requirements

NS_03 NS_04

Spectrum emission limit (dBm)/ Channel bandwidth ∆fOOB(MHz)

1.4MHz

3.0MHz

5MHz

10MHz

Measurement bandwidth

±±±± 0-0.1 -13 -13 -15 -18 30 kHz ±±±± 0.1-1 -13 -13 -13 -13 100 kHz±±±± 1-2.5 -13 -13 -13 -13 1 MHz

±±±± 2.5-2.8 -25 -13 -13 -13 1 MHz±±±± 2.8-5 -13 -13 -13 1 MHz±±±± 5-6 -25 -13 -13 1 MHz

±±±± 6-10 -25 -13 1 MHz±±±± 10-15 -25 1 MHz


1.4MHz

3.0MHz

5MHz

10MHz

15MHz

20MHz

Measurement

bandwidth±±±± 0-1 -10 -13 -15 -18 -20 -21 30 kHz

±±±± 1-2.5 -13 -13 -13 -13 -13 -13 1 MHz±±±± 2.5-

2.8-25 -13 -13 -13 -13 -13 1 MHz

±±±± 2.8-5 -13 -13 -13 -13 -13 1 MHz±±±± 5-6 -25 -25 -25 -25 -25 1 MHz

±±±± 6-10 -25 -25 -25 -25 1 MHz±±±± 10-15 -25 -25 -25 1 MHz±±±± 15-20 -25 -25 1 MHz±±±± 20-25 -25 1 MHz


1.4MHz

3.0MHz

5MHz

10MHz

15MHz

20MHz

Measurement

bandwidth±±±± 0-1 -10 -13 -15 -18 -20 -21 30 kHz

±±±± 1-2.5 -13 -13 -13 -13 -13 -13 1 MHz±±±± 2.5-2.8

-25 -13 -13 -13 -13 -13 1 MHz

±±±± 2.8-5 -13 -13 -13 -13 -13 1 MHz±±±± 5-6 -25 -13 -13 -13 -13 1 MHz

±±±± 6-10 -25 -13 -13 -13 1 MHz±±±± 10-15 -25 -13 -13 1 MHz±±±± 15-20 -25 -13 1 MHz±±±± 20-25 -25 1 MHz

NS_06/NS_07

Adjacent Channel Leakage Ratio (ACLR)

E-UTRAACLR1 UTRA ACLR2 UTRAACLR1

RB

E-UTRA channel

∆fOOB

Spurious EmissionsFrequency Range Maximum Level Measurement Bandwidth

9 kHz ≤≤≤≤ f < 150 kHz -36 dBm 1 kHz

150 kHz ≤≤≤≤ f < 30 MHz -36 dBm 10 kHz

30 MHz ≤≤≤≤ f < 1000 MHz -36 dBm 100 kHz

1 GHz ≤≤≤≤ f < 12.75 GHz -30 dBm 1 MHz

3GPP Mobile (UE) Requirements - Spurious

emission band UE co-existenceTable 6.6.3.2-1: Requirements

E-UTRA BandSpurious emission

Protected band Frequency range (MHz) Maximum Level (dBm)

MBW (MHz)

Note

20 E-UTRA Band 1, 3, 7, 8, 20, 22, 33, 34, 43

FDL_low - FDL_high -50 1

E-UTRA Band 20 FDL_low - FDL_high -50 1 15

E-UTRA Band 38, 42 FDL_low - FDL_high -50 1 2

NOTE 2: As exceptions, measurements with a level up to the applicable requirements defined in Table 6.6.3.1-2 are permitted for each assigned E-UTRA carrier used in the measurement due to 2nd, 3rd, 4th [or 5th] harmonic spurious emissions. An exception is allowed if there is at least one individual RB within the transmission bandwidth (see Figure 5.6-1) for which the 2nd, 3rd or 4th harmonic totally or partially overlaps the measurement bandwidth (MBW).

NOTE 15: These requirements also apply for the frequency ranges that are less than ∆fOOB (MHz) in Table 6.6.3.1-1 and Table 6.6.3.1A-1 from the edge of the channel bandwidth.

3GPP TS 36.101 V11.3.0 (2012-12)

LTE MS - Baseline Requirements – EIRP limits /

DTT

OOB limits

In-Band

23dBm

Source: CEPT report 30

3GPP Mobile (UE) Requirements - Band 20

Table 6.2.2-1: UE Power Class

3GPP TS 36.101 V11.3.0 (2012-12)

EUTRA band

Class 1 (dBm)

Tolerance (dB)

Class 2 (dBm)

Tolerance (dB)

Class 3 (dBm)

Tolerance (dB)

Class 4 (dBm)

Tolerance (dB)

20 23 ±22

NOTE 2: 2 refers to the transmission bandwidths (Figure 5.6-1) confined within FUL_low and FUL_low + 4 MHz or FUL_high –4 MHz and FUL_high, the maximum output power requirement is relaxed by reducing the lower tolerance limit by 1.5 dB

LTE BS (eNB) - Baseline Requirements – EIRP limits / DTT

Source: CEPT report 30

3GPP Base Station (eNB) Requirements - DTT Protection

Table G-1: EIRP limits for protection of broadcasting (DTT) service

Case Measurement filter centre frequency

Condition on BS maximum aggregate EIRP

/ 10 MHz, PEIRP_10MHz(Note)

Maximum LevelPEIRP,N,MAX

Measurement Bandwidth

A: for DTT frequencies where broadcasting is protected

N*8 + 306 MHz, 21 ≤ N ≤ 60

PEIRP_10MHz ≥ 59 dBm 0 dBm 8 MHz

N*8 + 306 MHz, 21 ≤ N ≤ 60

36 ≤ PEIRP_10MHz < 59 dBm PEIRP_10MHz – 59 dBm 8 MHz

N*8 + 306 MHz, 21 ≤ N ≤ 60

PEIRP_10MHz < 36 dBm -23 dBm 8 MHz

B: for DTT frequencies where broadcasting is subject to an intermediate level of protection

N*8 + 306 MHz, 21 ≤ N ≤ 60

PEIRP_10MHz ≥ 59 dBm 10 dBm 8 MHz

N*8 + 306 MHz, 21 ≤ N ≤ 60

36 ≤ PEIRP_10MHz < 59 dBm PEIRP_10MHz – 49 dBm 8 MHz

N*8 + 306 MHz, 21 ≤ N ≤ 60

PEIRP_10MHz < 36 dBm -13 dBm 8 MHz

C: for DTT frequencies where broadcasting is not protected

N*8 + 306 MHz, 21 ≤ N ≤ 60

N.A. 22 dBm 8 MHz

NOTE: PEIRP_10MHz (dBm) is defined by the expression PEIRP_10MHz = P10MHz + Gant + 10*log10(Nant )

3GPP TS 36.104 V11.3.1 (2013-01)

3GPP Base Station (eNB) Requirements

BS class PRATWide Area BS - (note)

Medium Range BS < + 38 dBm

Local Area BS < + 24 dBm

Home BS < + 20 dBm (for one transmit antenna port)< + 17 dBm (for two transmit antenna ports)< + 14dBm (for four transmit antenna ports) < + 11dBm (for eight transmit antenna ports)

NOTE: There is no upper limit for the rated output power of the Wide Area Base Station.

Table 6.2-1: Base Station rated output power

3GPP TS 36.104 V11.3.1 (2013-01)

3GPP Base Station (eNB) Requirements - Transmitter RF

Spectrum

Table 6.6.3.2.1-3: General operating band unwanted emission limits for 5, 10, 15 and 20 MHz channel bandwidth (E-UTRA bands <1GHz) for Category B

3GPP TS 36.104 V11.3.1 (2013-01)

Frequency offset of measurement

filter -3dB point, ∆∆∆∆f

Frequency offset of measurement filter centre

frequency, f_offset

Minimum requirement (Note 1) Measurement bandwidth (Note

4)

0 MHz ≤ ∆f < 5 MHz 0.05 MHz ≤ f_offset < 5.05 MHz 100 kHz

5 MHz ≤ ∆f < min(10 MHz, ∆fmax)

5.05 MHz ≤ f_offset < min(10.05 MHz, f_offsetmax)

-14 dBm 100 kHz

10 MHz ≤ ∆f ≤ ∆fmax 10.05 MHz ≤ f_offset < f_offsetmax

-16 dBm (Note 6) 100 kHz

NOTE 1:For a BS supporting non-contiguous spectrum operation the minimum requirement within sub-block gaps is calculated as a cumulative sum of adjacent sub blocks on each side of the sub block gap. Exception is Df ≥ 10MHz from both adjacent sub blocks on each side of the sub-block gap, where the minimum requirement within sub-block gaps shall be -16dBm/100kHz.

dBMHz

offsetfdBm

−⋅−− 05.0_

5

77

Wide Area BS - Category B (Option 1) - Band 20

3GPP Base Station (eNB) Requirements - Example

(P=43dBm)

Thanks to Dr.M.Lalam for curves

OFCOMDynamics / Influence of LTE UE’s Mode of operation

LTE Power Spectral Density variations

Source: Real Wireless for Ofcom (Feb.2012)

Measurement Example from LTE UE in Block

C(UK)/D(France) – 850MHz

Source: Ofcom (August 2012)

LTE UE – Measurements


Pmax: 23dBmBW: 10MHz50 RBsBlock C (UK)@857MHz16QAM

LTE UE - Differences between Block B & C


LTE UE – near / Far influence onto OOB


LTE UE – direct influence of Required Throughput (RB usage)

onto OOB


LTE UE – Influence of RB (Throughput) onto Emission mask


OFCOM

Estimation of Separation distance between LTE UE and DTT device

LTE Uplink interferencetowards DTT Rx – Use cases

Source:Ofcom (Feb.2012)

Set-Top DTT receptionFixed Roof-top DTT reception

Protection Ratio (PR) –Interference – Example/Link budget

ITU-R 419-3

Source:Ofcom / Real Wireless (Feb.2012)

Protection Ratio (PR) –Interference – Example/Link budget


Minium Separation distance (m): DTT @786MHz

100% LTE Interference Activity 10% LTE Interference Activity


Minium Separation distance (m): DTT @786MHz, 100% LTE


EN 55020

Estimation of Separation distance between LTE UE and DTT device

CENELEC - EN 55020/2007

Source: EN 55020 - 2007

CENELEC - EN 55020/A11

Source: Amendment A11, July 2012

ITU-RLTE Protection Ratios for DVB-T & DVB-T2

ITU-R – Protection Ratio for DVB-T2 / LTE UE (1/2)

Source: ITU-R (Nov.2012 )WP6A

Un-corrected

ITU-R – Protection Ratio & overload for DVB-T2 / LTE UE (2/2)


ITU-R – Correction Factors to be applied Vs DVB-T2 variants


ITU-R: RECOMMENDED Protection Ratio (PR) & Overload Threshold

(Oth)


To be used for sharing studies (Mix of different tuners categories)

ITU-R Tuners types / Categories

DIGITAL EUROPEIdentification of issues & solutions proposals

DTT – Categories of Radiated & conducted interferences (1/2)

Source: Digital Europe, Dec.2012

AGC

Low-Pass Filter

DTT – Categories of Radiated & conducted interferences (2/2)

ETSI/CENELECJoint Working Group (JWG) on Digital Dividend (DD) - Proposals

CENELEC – ETSI 2011: Joint Working Group (JWG) on Digital

Dividend

http://docbox.etsi.org/Etsi_Cenelec/PUBLIC%20FOLDER%20on%20DD/

Source: CENELEC/ETSI

NorDig v2.0 – immunity UHF


EN 55020 – Analog Immunity RF Voltage


EN 55020 – DVB-T immunity RF Voltage


D-Book – immunity UHF


DTG-UKD-Book 7, v1 – 2011 / v2 - 2012

D-Book 7 (DTG)(1/4)

•Digital Book 7, part A• Section 9.14.2.1

‘Interference from LTE Signals’

•“The exact mechanism for this is not yet understood, butit is thought that it may be caused by disturbances to thereceiver's automatic gain control (AGC) circuitryresulting from the time-varying LTE signal . Equally, ithas been seen that some well-designed receivers arevirtually immune to the differences between the constantpower signals and the time-varying signals.

•To minimise the risk of disturbance to televisionreception, it is very important therefore that receiverdesigners ensure that their implementations areunaffected by such time-varying LTE signals. The restof this section first describes the interferenceenvironment, and then some preliminary tests.

•Note that these tests are considered preliminary atthis stage, so it may be considered necessary to changethem in the near future. For the avoidance of doubt,these LTE protection ratios are the values that will beused for testing new receivers , but it should beremembered that some older receivers alreadydeployed may have significantly worse performance inthis respect .”

V1, March 2011 / V2, March 2012

D-Book 7 (DTG)(2/4)

•Worst cases for interferences:-Low activity (BS/UE)

- � Time-varying signal enveloppe

-DTT receiver architecture- CAN tuner (super-

heterodyne): band C worst

- Si Tuner: Band A worst

Preliminary LTE interference test tolerances

LTE interference test conditions

D-Book 7 (DTG): DVB-T/T2 Modulation Modes (3/4)

DVB-T

DVB-T2

D-Book 7 (DTG): LTE Tests arrangements (4/4)

BS (eNodeB) UE/Terminal

NORDIGUnified NorDig v2.4, 2013

NorDig v2.4

NorDigrequirementsare the mostdemanding!Even harder than DTG

(UK)

Table 3.17, p.51

Orange FR DD frequencies

January 2013

LTE AUCTIONSSpecial Focus in France

France

@800MHz@2,6GHz

Trials in 2012

Marseille Lyon

Mass Commercial Launch in 2013

N.B1: deployment @800MHz expected to be slow due to frequency plan from ANFR + potential issues with Digital TVN.B2: @2.6GHz, still issues with some geographical locationsN.B3: @1800 MHz, Waiting for Official Answer from ARCEP to allow Bouygues Telecom to refarm its 1800MHz with LTE

Lille

France – Digital Dividend LTE allocation

(Ofcom & DTG-UK)Mapping

Orange FR DD frequencies

CONCLUSIONS & WAY-FORWARD

NXP Tuners Released

TDA 18218

08/07/2009

TDA 18212*

26/08/2010 11/02/2013

TDA 18214

Strong Immunity to LTE & WLANSClaimed by NXP

Jan.2013

Feb.2011

Mar.2012

Jul.2012

EN 55020/A11

D-Book 7, v2

JWG DD

Dec.2012

Nov.2012

Jun.2010

Report 148

*SW upgrade feasible to reach DTG & NorDig Requirements

Mar.2011

D-Book 7, v1

Open Discussions w.r.t Standard & Certification

Strategy•EN 55020i)Amendment to cover all Types of DVB receivers, not only cable?ii)CISPR 35 proposal: prEN55035

i) 3V/m to be relaxed to 1V/m?ii) Whole band [470-862]

instead of [790-862]?

•Strategy/approachi)EMC Directivesii)Voluntary & applied Certification System (e.g. NorDig, D-Book, …)

Thanks for your attention…

Any Question, any interest in Internship and/or Job application:

[email protected]

Download - Supelec lte 4G - digital terrestrial tv (DTT) coexistence update - 2013

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