WCDMA GSM SECOND PART

8/16/2019 WCDMA GSM SECOND PART

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Spectrum Test andInstructions for

YBT250

ISSUE1.0


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Preface• The WCDMA system is a restricted

communication system y the inter!erence.

The net"or# $ua%ity& ca'acity and co(erage

are a%% re%ated to the ac#ground noise.• When design the radio net"or#& "e must

otain the strength o! the ac#ground

noise in the co(erage area.

• I! strong inter!erence e)ists "ithin the

and& s'ectrum test need to e 'er!ormed&or the o'erator ha(e to a''%y !or ne"

!re$uency s'ectrum.


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• A!ter studying this course&you shou%d e a%e to+ – ,no" the sources o! e%ectromagnetic ac#groundinter!erence.

– Master the methods !or e%ectromagneticac#ground test.

– ,no" ho" to use -T/0 !or s'ectrum test.

Objectives


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Page

ContentsChapter 1 Impact of Electromagnetic

Interference on the System

Chapter 2 Sources of Electromagnetic

Background Interference

Chapter Introduction to

Interference Test Tools

Chapter ! "ethods for

Electromagnetic Background

TestChapter 5 Instructions for YBT250


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Page

Chapter 1 Impact of Electromagnetic Interference on the

System

1#1 Bands $sed in the %C&"' System

1#2 Interference (e)uirements for $E(eception

1# Interference (e)uirements for *odeB(eception

Contents


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Bands used in the %C&"' system

OperatingBand

UpLink Band

UE transmit, Node Breceive

DownLink Band

UE receive, Node Btransmit

I 1920 - 1980 MHz 2110 -2170 MHz

II 1850 -1910 MHz 1930 -1990 MHz

III 1710-1785 MHz 1805-1880 MHz

IV 1710-1755 MHz 2110-2155 MHz

V 824 - 849MHz 869-894MHz

VI 830-840 MHz 875-885 MHz

VII 2500 - 2570 MHz 2620 - 2690 MHz

VIII 880 - 915 MHz 925 - 960 MHz

IX 1749.9 - 1784.9 MHz 1844.9 - 1879.9 MHz

and I& II& and II are most 'o'u%ar used in the

"or%d.

and I is used in China.


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Impact of Electromagnetic Interference on the System

• Determine the im'act o! inter!erence on the system according toe)'erience& as sho"n in the !o%%o"ing ta%e 5!or UE6.

Interference Band

Interference Leve

Not !ffecting"eceiver #ensitivit$%&it' t'e #ensitivit$&orsened b$ ()* dB+

!cceptabe

Interference Leve%&it' t'e #ensitivit$&orsened b$ dB+

!cceptabe

Interference Leve%&it' t'e #ensitivit$&orsened b$ - dB+

Interference .'at #erio/s$Effects E0/ipment Inde1es

Instead of E0/ipment "/nning,Lower .'an t'e 2a1im/m #igna#trengt' %345 dBm+ t'e UE Can

"eceive b$ *( dB

Protoco"e0/irement

2110-2170 MHz (co-frequency n!erference"

-117 #$%& 3.84 MHz-101 #$%& 3.84MHz

-96 #$%& 3.84 MHz -35 #$%& 3.84 MHz'e requre#)en)!*!y ) -107#$%& 3.84 MHz.

2095-2185 MHz (+#,+cen!c+nne n!erference#e*+!e# fro% !e c+rrer

/y ±5 MHz"

-82 #$%& 3.84 MHz -66 #$%& 3.84 MHz -61 #$%& 3.84 MHz -16 #$%& 3.84 MHz

-66 #$%& 3.84MHz (! !e)en)!*!y

or)ene# /y 3 #$"

2095-2185 MHz (n-/+n#/ocn #e*+!e# fro%

!e c+rrer /y ±10 MHz"-72 #$%& 3.84 MHz -56 #$%& 3.84 MHz -51 #$%& 3.84 MHz -6 #$%& 3.84 MHz

-56 #$%& 3.84MHz (! !e)en)!*!yor)ene# /y 3 #$"

2095-2185 MHz (n-/+n#/ocn #e*+!e# fro%

!e c+rrer /y ±15 MHz"-60 #$%& 3.84 MHz -44 #$%& 3.84 MHz -39 #$%& 3.84 MHz 6 #$%& 3.84 MHz

-44 #$%& 3.84MHz (! !e)en)!*!yor)ene# /y 3 #$"

!er /+n#) (ou!-of-/+n#/ocn +n# )urou)re)on)e"

-60 #$%& 3.84 MHz -44 #$%& 3.84 MHz -39 #$%& 3.84 MHz 6 #$%& 3.84 MHz

-44 #$%& 3.84MHz (! !e)en)!*!yor)ene# /y 3 #$"

o!e #$%&Hz refer) !o !e e*e un! of )ne-!one )n+). 'e reference or! for %e+)ure%en! ) !e rece!on or! of !e +n!enn+. 'e reference requre%en!) +re /+)e# on !e ro!oco ':25.101.


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• Determine the im'act o! inter!erence on the system accordingto e)'erience& as sho"n in the !o%%o"ing ta%e 5!or 8ode6.

Interference Band

Interference Leve

Not !ffecting"eceiver #ensitivit$%&it' t'e #ensitivit$&orsened b$ ()* dB+

!cceptabe

Interference Leve%&it' t'e

#ensitivit$&orsened b$ dB+

!cceptabe

Interference Leve%&it' t'e

#ensitivit$&orsened b$ - dB+

Interference .'at #erio/s$

Effects E0/ipment Inde1esInstead of E0/ipment "/nning,Lower .'an t'e 2a1im/m

#igna #trengt' %36( dBm+ t'eUE Can "eceive b$ *( dB

#pecification for NodeBInde1es

1920-1980 MHz (co-frequency n!erference"

-121 #$%& 3.84 MHz -105 #$%& 3.84 MHz-100 #$%& 3.84MHz

-80 #$%& 3.8 4MHz'e )en)!*!y )ecfc+!on) -123 #$%&3.84MHz.

1900-2000 MHz(+#,+cen! c+nnen!erference #e*+!e#

fro% !e c+rrer /y ±5

MHz"

-63 #$%& 3.84 MHz -47 #$%& 3.84 MHz -42 #$%& 3.84 MHz -22 #$%& 3.84 MHz-42 #$%& 3.84 MHz (! !e)en)!*!y or)ene# /y 6#$"

1900-2000 MHz (n-/+n# /ocn"


1900-2000 MHz (ou!-of-/+n# /ocn"


935-960 MHz1805-1880 MHz (ou!-of-/+n# /ocn"

-5 #$%&Hz 11 #$%&Hz 16 #$%&Hz 36 #$%&Hz16 #$%&Hz (! !e)en)!*!y or)ene# /y 6#$"

!er /+n#) (ou!-of-/+n# /ocn" -26 #$%&Hz -10 #$%&Hz -5 #$%&Hz 15 #$%&Hz

-5 #$%&Hz (! !e

)en)!*!y or)ene# /y 6#$"

o!e #$%&Hz refer) !o !e e*e un! of )ne-!one )n+). 'e reference or! for %e+)ure%en! ) !e rece!on or! of !e o#e$ +n!enn+. 'e reference requre%en!) +re /+)e# on !e ro!oco ':25.101. ;urn +n+y)) !e n#e< for +#,+cen! c+nne n!erference +n# n-/+n# /ocn ) 10 #$ /e!!er !+n !+! )ecfe# n !e ro!oco. ') ) !e => n#e< !e o#e$

c+n en)ure.


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• Interference re)uirements for $E

reception 5ta#ing the and /110 9 /120

M:; as an e)am'%e6 – Inter!erence and+ /110 9 /120 M:;

– Inter!erence %e(e% not a


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• Interference re)uirements for *odeB

reception 5ta#ing the and 17/0 91740

M:; as e)am'%e6 – Inter!erence and+ 17/0 9 1740 M:;

– Inter!erence %e(e% not a


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Chapter 1 Impact ofElectromagneticInterference on theSystem

Chapter 2 Sources ofElectromagneticBackground Interference

Chapter Introduction toInterference Test Tools

Chapter ! "ethods forElectromagneticBackground Test

Chapter 5 Instructions for YBT250

Contents


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2+ Band 'llocation

• In china& /> ands are a%%ocated as !o%%o"s+

Band %278+ Occ/pation

1710?1720&1805?1815 :M1800 for @n+ Mo/e

1745?1755&1840?1850 :M1800 for @n+ nco%

1800?1805 @;MA ($e,n Xne"

1850?1865&1920?1945 =e)er*e#

1865?1880&1954?1960 B@1900 (no! occue#"

1880?1900&1960?1980 >;; CID (u)e# /y @n+ 'eeco% +n# @n+nco% n )o%e c!e) /y !e en# of 2002"

1900?1920 ';; CDD (BH&;@'"

P%anning o! ands 1.4 >:; and 1.7 >:; in China


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Chapter 2 Sources of

Electromagnetic


2#1 2+ Band'llocation

2#2 'nalysis onInterferenceSources• TDD W??

• @DD W??

• Micro"a(e transmission

•

Contents


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'nalysis of Interference Sources

• TDD W?? 5P:S=DECT6 – The system occu'ies the 1700 917/0 M:; and. – @or the P:S system& the and"idth occu'ied y the

channe% is sma%%er than or e$ua% to /44 ,:;.

– @or the DECT system& the and"idth occu'ied y thechanne% is sma%%er than or e$ua% to 133 ,:;.

• @DD W?? – U'%in# and+ 1440 91700 M:;

– Do"n%in# and+ 170 91740 M:;

– The and"idth occu'ied y the system is 1./ M:;.

– The EiP o! a ty'ica% 8ode is aout / dm.


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'nalysis of Interference Sources

• Micro"a(e transmission – Bccu'ied and"idth+ usua%%y o(er se(era% M:;. – 8orma% rece'tion %e(e% o! micro"a(e is aout 90 dm& im'osing a

great im'act on the WCDMA system.

• e'eater – 8onstandard insta%%ation resu%ts in insucient antenna iso%ation& thus

se%!9e)citation. This a


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• Antenna – Bmnidirectiona% antenna+ It !aci%itates inter!erence

measurement instead o! inter!erence %ocation.

– Directiona% antenna+ It is used to search inter!erencesources. The more distinct the directi(ity is and thehigher the gain is& the stronger the searching ca'ai%ityis.

– Common directiona% antennas+• Pane% antenna

• -agi antenna

• ?og 'eriodic antenna


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•?o" noise am'%ier 5?8A6 – Used to im'ro(e the recei(er sensiti(ity o! the testing

instrument.

– During a test& "e can se%ect the ?8A "ith 30 d gain and d noise coecient.

– Additiona% 'o"er su''%y needs to e considered !or the

?8A. Some testing instruments 5%i#e -T/0 6 arecongured a ui%t9in ?8A.

– @or a cascade net"or#& the noise coecient o! the systemde'ends on %e(e%91 noise coecient "hen a high gainam'%ier is congured at the !ront end o! the system.


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Chapter 1 Impact of

Electromagnetic

Interference on the

System


Electromagnetic


Chapter Introduction toInterference Test Tools


Electromagnetic

Background Test

Chapter 5 Instructions for

Contents


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Chapter ! "ethods for Electromagnetic

Background Test

!#1 reparations!#2 Setting Basic arameters

!# "easurement rocedure

!#! &ata rocessing

Contents


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reparations

•Master %oca% radio and'%anning and the usage o! radioe$ui'ment y enter'rises – @or 'i%ot net"or#s

• 8o a(ai%a%e !re$uency is determined and the testing !re$uency isa%%ocated tem'orari%y. During a s'ectrum test& you need to scanthe entire and or se%ect se(era% M:; ands !or test accordingto the %oca% !re$uency resources !or use at the %ater 'hase.

– @or commercia% net"or#s

• @re$uency resources are determined. The test !ocuses on theands used y the o'erator and is intended to e%iminate

inter!erence at the ands in use.


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reparations

• Determine the test time and '%ace – U'%in# e%ectromagnetic inter!erence test• Test '%ace+ the '%ace "here the 8ode antenna is insta%%ed.

• Conduct the test in three directions 50F& 1/0F and /*0F6.

• Use a 'orta%e antenna or the 8odeGs antenna.

– Do"n%in# e%ectromagnetic inter!erence test• Se%ect a certain $uantity o! ty'ica% 'oints "ithin the ce%% co(erage !or

test.

• Conduct the test in three directions 50F& 1/0F and /*0F6.

• Use a 'orta%e antenna.

• Per!orm a dri(e test& dri(e the (ehic%e s%o"%y a%ong the main streets

co(ered y a ce%% and then sto' the (ehic%e !or !urther test "hendetecting the inter!erence.


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reparations

• Pre'are too%sand ma#e surethat they are

a(ai%a%e+ – S'ectrum ana%y;er – >PS recei(er

– Com'ass

– Testing antenna

– ehic%e


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Setting Basic arameters

• Set the !o%%o"ing asic

'arametersParameter Parameter 9a/e "emarks

>on >oG1950 #onn >oG2140

(MHz"

@en!r+ frequency of !e

)ec!ru% un#er !e)!

BA >or e


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Background Test

!#1 reparations!#2 Setting Basic arameters


!#! &ata rocessing

Contents


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"easurement rocedure

• Determining the test a;imuth – Se%ect the 'osition "here the 8ode antenna is insta%%ed !or test.

Usua%%y& you need to conduct the test in three directions. I! thedirection o! the 8ode antenna is determined& ma#e the testingantenna e in the same direction as the 8ode antenna.

• Searching inter!erence – Search inter!erence "ithin the u'%in# and and then "ithin the

do"n%in# and.

– S'ecic o'erations+

• Enter the -T/0 s'ectrum test inter!ace and set 3o and Span.

• @i%% in the record ta%e& sa(e data %es& and chec# "hether there isinter!erence.

– Hudge ru%e+ "hether there is inter!erence "a(e!orm higher than the

noise oor.


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• Inter!erence conrmation – During inter!erence search& i! there is inter!erence& conduct a

inter!erence conrmation test. S'ecic ste's are as !o%%o"s+

• Enter the inter!ace !or measuring -T/0 8ode test in!ormation& and

set 3o to a centra% !re$uency 'oint near inter!erence& Span to 6

interference and.idth& and Channel Band.idth to ! ".

• ead the in9and inter!erence 'o"er& %% in the record ta%e& and sa(e

the data %e.

• In9and test – @or the customer 'i%ot& test the in9and 'o"er !or a%% the candidate

channe%s. @or commercia% oces& !ocus on testing the in9and

'o"er !or the a(ai%a%e channe%s. S'ecic ste's are as !o%%o"s+• Enter the inter!ace !or measuring -T/0 8ode test

in!ormation& and set 3o to a centra% !re$uency 'oint o! the

testing channe%& Channel Band.idth to 5 "& and Span to

6 interference and.idth.

• ead the in9and 'o"er& %% in the record ta%e& and sa(e thedata %e.


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• Do"n%in# dri(e testDo"n%in# dri(e test means dri(ing a (ehic%e s%o"%y a%ong themain streets co(ered y a ce%% and conducting a 'oint testa!ter disco(ering %arge inter!erence.

S'ecic o'erations+

• Enter the -T/0 s'ectrum test inter!ace.

• Set 3o to 21!0 "7, and Span to 80 "7,. Search inter!erence

"hen the (ehic%e mo(es at a s'eed %o"er than 1 #m=h.

Point test items inc%ude+

• Set 3o to a centra% !re$uency 'oint near the inter!erence& Channel

Band.idth to ! "7,& and Span to 6 interference

and.idth. ecord the in9and inter!erence 'o"er.

• Br set 3o to a centra% !re$uency 'oint o! the testing channe%&

Channel Band.idth to 5 "7,& and Span to 6 channel

and.idth. ecord the in9and 'o"er.


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Background Test

!#1 reparations

!#2 Setting Basic arameters


!#! &ata rocessing

Contents


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9uestion

• Is theinter!erence%e(e% otained

!rom thee%ectromagneticinter!erence

test e$ua% to the%e(e% o! theinter!erence

signa%s at the


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'ns.er

• Testing system – Antenna gain+ 3 di

– @eeder %oss+ 1 d

– Measured inter!erence %e(e%+ 970 dm

• WCDMA system – >ain o! the 8ode antenna+ 10 di

– @eeder %oss+ / d

– Inter!erence %e(e% at the 8ode+ 70 9 53 916 K 510 9 /6＝ 9

4* dm


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9uestion

• :o" to estimatethe 'o"er o! theinter!erence%e(e% "ithin thechanne%and"idth

according to theinter!erence%e(e% "ithin the

WJ


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'ns.er

• The WCDMA system isa roadand system.

There!ore& you need to

ca%cu%ate the integra%'o"er o! theinter!erence %e(e%"ithin the channe%and"idth. – W o! the testing system+ 10 ,:; – Inter!erence %e(e% "ithin the W+ 940

dm – Channe% and"idth+ 3.4* M:; – Integra% 'o"er "ithin the channe%+


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Chapter 1 Impact of

Electromagnetic

Interference on the

System


Electromagnetic


Chapter Introduction to



Electromagnetic

Background Test

Chapter 5 Instructions for YBT250

Contents


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Chapter 5 Instructions for

YBT250

System connection

o.er:on

"easurement

"easurement setting

"easurement result

Contents


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Instructions for YBT250

• e!ore site sur(ey& youneed to conduct as'ectrum test and nd

'ro'er !re$uency testinstruments.

• Te#troni) -T/0 is

recommended.• @eatures o! -T/0

– Porta%e& easy to carry

– System integration& "ith a ui%t9in ?8A


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• System connection – The matched antenna o! -T/0 is -agi directiona% antenna.

– A 'orta%e sma%% antenna can e used!or e%ectromagnetic ac#ground test.

– -T/0 can use the attery de%i(eredtogether or can e e)terna%%y

connected to the 'o"er su''%y.

• Po"er9on – Press o.er and enter the Windo"s

CE o'erating system.

– Enter the measurement inter!acethrough the touch screen o! -T/0.

-T/0s'ectrumana%y;er

-a$i antenna

@i%ter

?8A

Ca%e


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• Measurement – -T/0 su''orts the !o%%o"ing three

measurement !unctions+

• 8ode in!ormation measurement

• S'ectrum test

• Inter!erence source search

– S'ectrum test su''orts the!o%%o"ing t"o dis'%ay modes+

• S'ectrum mode

• S'ectrogrum mode


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• Measurement – The s'ectrum mode is used !or rea%9time measurement.

• Determine the and to e tested and set 3o.

• Modi!y the s'an.

• Bser(e the s'ectrum diagram& adust the @o and s'an& and (ie"

"hether there is inter!erence.• The Trace menu inc%udes the !o%%o"ing o'tions+

– 8orma%& Ma) :o%d& Min :o%d and Ma)=Min :o%d

• Sa(e the current s'ectrum diagram.

8ote+ -ou need to set (ef-4l correct%y to ma#e the measuredsigna% %e(e% range !rom e!?(% to 5e!?(%920d6. The di


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• Measurement The s'ectrogrum mode is used to chec#"hether there is inter!erence at a certainand in a s'ecied time. The hori;onta%a)is stands !or the and and the (ertica%a)is !or the time.

S'ecic o'erations+• Set the automatic storage o'tion and a %e

name.

• Set the and 5@o and s'an6.

• B'en the sa(ed %e and (ie" inter!erence.

To (ie" the e)act inter!erence& you can

e)'ort the %e as+• A 'icture

• Data 5.t)t&.cs(6

• E)'ort the data !rom -T/0 using the Udis# or net"or# ca%e.


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• Measurement setting• @o+ the centra% !re$uency o! the testing signa% 5unit+ M:;6• S'an+ It can e set to 100 M:;& 10 M:; or M:;.

• W+ It is automatica%%y set y the instrument according to thes'an.

• Ma):o%d=A(erage+ dis'%ay the ma)imum (a%ue and the a(erage(a%ue.

• e!?(%+ set according to the inter!erence %e(e%.

• Measurement resu%tWCDMA Electromagnetic Interference Test Form and Report onWCDMA Electromagnetic Interference Test


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! spectr/m trai in t'e interference windowInstance of dispa$ing signa strengt'


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Conclusion

• This course

descries'ossi%einter!erence

sources at theWCDMA and&methods !ore%ectromagneticac# round test


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WCDMA GSM SECOND PART

Documents

Transcript of WCDMA GSM SECOND PART