Microsoft PowerPoint - LG U+ \307\342 LTE \301\337\260

LG U+ 향 LTE 중계기 검증 신호
한국애질런트 기술지원부
LG U+ LTE 중계기 성능 검증 신호
LTE FDD 10MHz signals (3gpp Std. 2009-12)
1. ETM 1.1
2. ETM 1.1(64QAM)
3. ETM 3.1
4. Stimulus Signal 1(FRC 4-6)
5. Stim Signal 1 + ETM 1.1 (45MHz 이격)
6. Stim Signal 1 + ETM 1.1(64QAM) (45MHz 이격)
7. Stim Signal 1 + ETM 3.1 (45MHz 이격)
위 신호는 중계기 제조사의 요청에 의해 한국애질런트 기술지원부에서 생성한 신호 입니다.
LTE 중계기용 Power Amp검증 신호
LTE FDD DL 10MHz, CCDF @ 0.01%
1. 7 dB
2. 7.5 dB
3. 8 dB
4. 8.5 dB
EVM 값은 고려하지 않은 신호입니다
위 신호는 중계기 제조사의 요청에 의해 한국애질런트 기술지원부에서 생성한 신호 입니다.
LTE Test signals
Downlink Test Models (E-TM: E-UTRA Test Models)
E-TM
Test case
Output power, occupied bandwidth, ACLR,
operating band unwanted emissions, transmitter
spurious emissions, transmitter intermodulation,
reference signal absolute accuracy
E-TM1.1
Maximum power tests
E-TM1.2
Includes power boosting and
ACLR, operating band unwanted emissions
de-boosting
E-TM2
E-TM3.1
Page 4
Notes
Minimum power tests
Total power dynamic range (lower OFDM symbol
power limit at min power, EVM of single 64QAM
PRB allocation (at min power), frequency error (at
min power)
Total power dynamic range (upper OFDM symbol
power limit at max power with all 64QAM PRBs
allocated), frequency error, EVM for 64QAM (at max
power)
E-TM3.2
Includes power boosting and
Frequency error, EVM for 16QAM
de- boosting
E-TM3.3
Includes power boosting and
Frequency error, EVM for QPSK
de-boosting
E-TM Aligned with Base Station Transmitter Tests
3GPP TS 36.141 e-NB Transmitter test case
6.2 Base Station Output Power
6.3 Output Power Dynamics
E-UTRA Test Models(E-TM)
E-TM1.1
6.3.1 Power Control Dynamic Range
E-TM 2; E-TM 3.1; E-TM 3.2; E-TM 3.3
6.3.2 Total Power Dynamic Range
E-TM 2; E-TM 3.1
6.4 Transmit ON/OFF Power
6.5 Transmitted Signal Quality
Note: this is for TDD only
6.5.1 Frequency Error
E-TM 2; E-TM 3.1; E-TM 3.2; E-TM3.3
6.5.2 Error Vector Magnitude
E-TM 2; E-TM 3.1; E-TM 3.2; E-TM3.3
6.5.3 Time alignment between transmitter branches
E-TM 1.1
6.5.4 DL RS Power
E-TM 1.1
6.6 Unwanted Emissions
6.6.1 Occupied Bandwidth
E-TM 1.1
6.6.2 Adjacent Channel Leakage Power Ratio
E-TM 1.1; E-TM 1.2
6.6.3 Operating Band Unwanted Emissions
E-TM 1.1; E-TM 1.2
6.6.4 Transmitter Spurious Emissions
E-TM 1.1
6.7 Transmitter Intermodulation
Page 5
E-TM 1.1
Backup slide - FRC
–
3GPP TS 36.141 V9.0.0 (2009-05)
A.1 Fixed Reference Channels for reference sensitivity and in--channel selectivity (QPSK,
R=1/3)
Table A.1-1 FRC parameters for reference sensitivity and in-channel selectivity
Reference channel
Allocated resource blocks
DFT-OFDM Symbols per subframe
Modulation
Code rate
Payload size (bits)
Transport block CRC (bits)
Code block CRC size (bits)
Number of code blocks - C
Coded block size including 12bits trellis termination (bits)
A1-1
6
12
QPSK
1/3
600
24
0
1
1884
A1-2
15
12
QPSK
1/3
1544
24
0
1
4716
A1-3
25
12
QPSK
1/3
2216
24
0
1
6732
A1-4
3
12
QPSK
1/3
256
24
0
1
852
A1-5
9
12
QPSK
1/3
936
24
0
1
2892
Total number of bits per sub-frame
Total symbols per sub-frame
1728
864
4320
2160
7200
3600
864
432
2592
1296
• A.2 Fixed Reference Channels for dynamic range (16QAM, R=2/3)
Table A.2-1 FRC parameters for dynamic range
Reference channel
Allocated resource blocks
DFT-OFDM Symbols per subframe
Modulation
Code rate
Payload size (bits)
Transport block CRC (bits)
Code block CRC size (bits)
Number of code blocks – C
Coded block size including 12bits trellis termination (bits)
Total number of bits per sub-frame
Total symbols per sub-frame
Page 6
A2-1
6
12
16QAM
2/3
2344
24
0
1
7116
A2-2
15
12
16QAM
2/3
5992
24
0
1
18060
A2-3
25
12
16QAM
2/3
9912
24
24
2
14988
3456
864
8640
2160
14400
3600
Backup slide - FRC
• A.3
3GPP TS 36.141 V9.0.0 (2009-05)
Fixed Reference Channels for performance requirements (QPSK 1/3)
Table A.3-1 FRC parameters for performance requirements (QPSK 1/3)
Reference channel
Allocated resource blocks
DFT-OFDM Symbols per subframe
Modulation
Code rate
Payload size (bits)
Transport block CRC (bits)
Code block CRC size (bits)
Number of code blocks - C
Coded block size including 12bits trellis termination (bits)
A3-1
1
12
QPSK
1/3
104
24
0
1
396
A3-2
6
12
QPSK
1/3
600
24
0
1
1844
A3-3
15
12
QPSK
1/3
1544
24
0
1
4716
A3-4
25
12
QPSK
1/3
2216
24
0
1
6732
A3-5
50
12
QPSK
1/3
5160
24
0
1
15564
A3-6
75
12
QPSK
1/3
6712
24
24
2
10188
A3-7
100
12
QPSK
1/3
10296
24
24
2
15564
288
144
1728
864
4320
2160
7200
3600
14400
7200
21600
10800
28800
14400
Total number of bits per sub-frame
Total symbols per sub-frame
• A.4 Fixed Reference Channels for performance requirements (16QAM 3/4)
Table A.4-1 FRC parameters for performance requirements (16QAM 3/4)
Reference channel
Allocated resource blocks
DFT-OFDM Symbols per subframe
Modulation
Code rate
Payload size (bits)
Transport block CRC (bits)
Code block CRC size (bits)
Number of code blocks - C
Coded block size including 12bits trellis
termination (bits)
Total number of bits per sub-frame
Total symbols per sub-frame
Page 7
A4-1
1
12
16QAM
3/4
408
24
0
1
1308
A4-2
1
10
16QAM
3/4
376
24
0
1
1212
A4-3
6
12
16QAM
3/4
2600
24
0
1
7884
A4-4
15
12
16QAM
3/4
6456
24
24
2
9804
A4-5
25
12
16QAM
3/4
10680
24
24
2
16140
A4-6
50
12
16QAM
3/4
21384
24
24
4
16140
A4-7
75
12
16QAM
3/4
32856
24
24
6
16524
A4-8
100
12
16QAM
3/4
43816
24
24
8
16524
576
144
480
120
3456
864
8640
2160
14400
3600
28800
7200
43200
10800
57600
14400
Backup slide - FRC
• A.5
3GPP TS 36.141 V9.0.0 (2009-05)
Fixed Reference Channels for performance requirements (64QAM 5/6)
Table A.5-1 FRC parameters for performance requirements (64QAM 5/6)
Reference channel
A5-1
A5-2
A5-3
A5-4
A5-5
A5-6
A5-7
Allocated resource blocks
1
6
15
25
50
75
100
DFT-OFDM Symbols per subframe
12
12
12
12
12
12
12
Modulation
64QAM
64QAM
64QAM
64QAM
64QAM
64QAM
64QAM
Code rate
5/6
5/6
5/6
5/6
5/6
5/6
5/6
Payload size (bits)
712
4392
11064
18336
36696
55056
75376
Transport block CRC (bits)
24
24
24
24
24
24
24
Code block CRC size (bits)
0
0
24
24
24
24
24
Number of code blocks - C
1
1
2
3
6
9
13
Coded block size including 12bits trellis termination (bits)
2220
13260
16716
18444
18444
18444
17484
Total number of bits per sub-frame
864
5184
12960
21600
43200
64800
86400
Total symbols per sub-frame
144
864
2160
3600
7200
10800
14400
Page 8
Backup slide – E-TM1.1
3GPP TS 36.141 V9.0.0 (2009-05)
6.1.1.1 E-UTRA Test Model 1.1 (E-TM1.1)
This model shall be used for tests on:
• BS output power
• Unwanted emissions
> Occupied bandwidth
> ACLR
> Operating band unwanted emissions
> Transmitter spurious emissions
• Transmitter intermodulation
• RS absolute accuracy
Table 6.1.1.1-1: Physical channel parameters of E-TM1.1
Parameter
1.4 MHz
Reference, Synchronisation Signals
RS boosting, PB = EB/EA
Synchronisation signal EPRE / ERS [dB]
Reserved EPRE / ERS [dB]
3 MHz
5 MHz
10 MHz 15 MHz 20 MHz
1
1
1
1
1
1
0.000
0.000
0.000
0.000
0.000
0.000
-inf
-inf
-inf
-inf
-inf
-inf
0.000
0.000
0.000
0.000
0.000
0.000
-inf
-inf
-inf
-inf
-inf
-inf
2
1
1
1
1
1
3.222
0
0
0
0
0
PBCH
PBCH EPRE / ERS [dB]
Reserved EPRE / ERS [dB]
PCFICH
# of symbols used for control channels
PCFICH EPRE / ERS [dB]
PHICH
# of PHICH groups
1
1
1
2
2
3
# of PHICH per group
2
2
2
2
2
2
-3.010
-3.010
-3.010
-3.010
-3.010
-3.010
0
0
0
0
0
0
# of available REGs
23
23
43
90
140
187
# of PDCCH
2
2
2
5
7
10
# of CCEs per PDCCH
1
1
2
2
2
2
PHICH BPSK symbol power / ERS [dB]
PHICH group EPRE / ERS [dB]
PDCCH
# of REGs per CCE
9
9
9
9
9
9
# of REGs allocated to PDCCH
18
18
36
90
126
180
# of <NIL> REGs added for padding
5
5
7
0
14
7
0.792
2.290
1.880
1.065
1.488
1.195
-inf
-inf
-inf
-inf
-inf
-inf
# of QPSK PDSCH PRBs which are boosted
6
15
25
50
75
100
PRB PA = EA/ERS [dB]
0
0
0
0
0
0
# of QPSK PDSCH PRBs which are deboosted
0
0
0
0
0
0
n.a.
n.a.
n.a.
n.a.
n.a.
n.a.
PDCCH REG EPRE / ERS [dB]
<NIL> REG EPRE / ERS [dB]
PDSCH
PRB PA = EA/ERS [dB]
Page 9
Backup slide – E-TM1.2
3GPP TS 36.141 V9.0.0 (2009-05)
6.1.1.2 E-UTRA Test Model 1.2 (E-TM1.2)
Table 6.1.1.2-1: Physical channel parameters of E-TM1.2
This model shall be used for tests on:
• Unwanted emissions
> ACLR
>Operating band unwanted emissions
Parameter
1.4 MHz
Reference, Synchronisation Signals
RS boosting, PB = EB/EA
Synchronisation signal EPRE / ERS [dB]
Reserved EPRE / ERS [dB]
3 MHz
5 MHz
10 MHz 15 MHz 20 MHz
1
1
1
1
1
1
0.000
-4.730
-4.730
-4.730
-4.730
-4.730
-inf
-inf
-inf
-inf
-inf
-inf
0.000
-4.730
-4.730
-4.730
-4.730
-4.730
-inf
-inf
-inf
-inf
-inf
-inf
PBCH
PBCH EPRE / ERS [dB]
Reserved EPRE / ERS [dB]
PCFICH
# of symbols used for control channels
2
1
1
1
1
1
3.222
0
0
0
0
0
# of PHICH groups
1
1
1
2
2
3
# of PHICH per group
2
2
2
2
2
2
-3.010
-3.010
-3.010
-3.010
-3.010
-3.010
0
0
0
0
0
0
# of available REGs
23
23
43
90
140
187
# of PDCCH
2
2
2
5
7
10
# of CCEs per PDCCH
1
1
2
2
2
2
# of REGs per CCE
9
9
9
9
9
9
# of REGs allocated to PDCCH
18
18
36
90
126
180
PCFICH EPRE / ERS [dB]
PHICH
PHICH BPSK symbol power / ERS [dB]
PHICH group EPRE / ERS [dB]
PDCCH
# of dummy REGs added for padding
PDCCH REG EPRE / ERS [dB]
<NIL> REG EPRE / ERS [dB]
5
5
7
0
14
7
0.792
2.290
1.880
1.065
1.488
1.195
-inf
-inf
-inf
-inf
-inf
-inf
40
PDSCH
# of QPSK PDSCH PRBs which are boosted
PRB PA = EA/ERS [dB]
# of QPSK PDSCH PRBs which are de-boosted
PRB PA = EA/ERS [dB]
2
6
10
20
30
3 (*)
3
3
3
3
3
4
9
15
30
45
60
-2.990 (*)
-4.730
-4.730
-4.730
-4.730
-4.730
Note (*): in subframes containing PBCH or synchronisation signal REs, no PRB boosting/deboosting shall be applied, i.e. PRB PA = EA/ERS = 0 [dB]
Page 10
Backup slide – E-TM2
3GPP TS 36.141 V9.0.0 (2009-05)
6.1.1.3 E-UTRA Test Model 2 (E-TM2)
Table 6.1.1.3-1: Physical channel parameters of E-TM2
This model shall be used for tests on:
• Total power dynamic range (lower OFDM
symbol power limit at min power),
> EVM of single 64QAM PRB allocation
(at min power)
> Frequency error (at min power)
Parameter
1.4 MHz 3 MHz
Reference, Synchronisation Signals
RS boosting, PB = EB/EA
5 MHz
10 MHz 15 MHz 20 MHz
1
1
1
1
1
1
0.000
0.000
0.000
0.000
0.000
0.000
-inf
-inf
-inf
-inf
-inf
-inf
0.000
0.000
0.000
0.000
0.000
0.000
-inf
-inf
-inf
-inf
-inf
-inf
# of symbols used for control channels
2
1
1
1
1
1
PCFICH EPRE / ERS [dB]
0
0
0
0
0
0
1
1
1
2
2
3
Synchronisation signal EPRE / ERS [dB]
Reserved EPRE / ERS [dB]
PBCH
PBCH EPRE / ERS [dB]
Reserved EPRE / ERS [dB]
PCFICH
PHICH
# of PHICH groups
# of PHICH per group
PHICH BPSK symbol power / ERS [dB]
PHICH group EPRE / ERS [dB]
2
2
2
2
2
2
-3.010
-3.010
-3.010
-3.010
-3.010
-3.010
0
0
0
0
0
0
23
23
43
90
140
187
PDCCH
# of available REGs
# of PDCCH
1
1
1
1
1
1
# of CCEs per PDCCH
1
1
2
2
2
2
# of REGs per CCE
9
9
9
9
9
9
# of REGs allocated to PDCCH
9
9
18
18
18
18
# of <NIL> REGs added for padding
14
14
25
72
122
169
PDCCH REG EPRE / ERS [dB]
0
0
0
0
0
0
-inf
-inf
-inf
-inf
-inf
-inf
# of 64QAM PDSCH PRBs within a slot for
which EVM is measured
1
1
1
1
1
1
PRB PA = EA/ERS [dB]
0
0
0
0
0
0
<NIL> REG EPRE / ERS [dB]
PDSCH
# of PDSCH PRBs which are not allocated
PRB PA = EA/ERS [dB]
Page 11
5
14
24
49
74
99
-inf
-inf
-inf
-inf
-inf
-inf
Backup slide – E-TM3.1
6.1.1.4 E-UTRA Test Model 3.1 (E-TM3.1)
This model shall be used for tests on:
• Output power dynamic
> Total power dynamic range (upper OFDM
symbol power limit at max power with all
64QAM PRBs allocated)
3GPP TS 36.141 V9.0.0 (2009-05)
Table 6.1.1.4-1: Physical channel parameters of E-TM3.1
Parameter
1.4 MHz 3 MHz
Reference, Synchronisation Signals
RS boosting, PB = EB/EA
Synchronisation signal EPRE / ERS [dB]
5 MHz 10 MHz 15 MHz 20 MHz
1
0.000
1
0.000
1
0.000
1
0.000
1
0.000
1
0.000
-inf
-inf
-inf
-inf
-inf
-inf
0.000
-inf
0.000
-inf
0.000
-inf
0.000
-inf
0.000
-inf
0.000
-inf
2
1
1
1
1
1
3.222
0
0
0
0
0
1
2
-3.010
0
1
2
-3.010
0
1
2
-3.010
0
2
2
-3.010
0
2
2
-3.010
0
3
2
-3.010
0
23
2
23
2
43
2
90
5
140
7
187
10
1
9
18
5
0.792
-inf
1
9
18
5
2.290
-inf
2
9
36
7
1.880
-inf
2
9
90
0
1.065
-inf
2
9
126
14
1.488
-inf
2
9
180
7
1.195
-inf
# of 64QAM PDSCH PRBs within a slot for
which EVM is measured
6
15
25
50
75
100
PRB PA = EA/ERS [dB]
# of PDSCH PRBs within a slot for which
EVM is not measured (used for power
balancing only)
PRB PA = EA/ERS [dB]
0
0
0
0
0
0
0
0
0
0
0
0
n.a.
n.a.
n.a.
n.a.
n.a.
n.a.
Reserved EPRE / ERS [dB]
PBCH
PBCH EPRE / ERS [dB]
Reserved EPRE / ERS [dB]
PCFICH
• Transmitted signal quality
> Frequency error
> EVM for 64QAM modulation (at max power)
# of symbols used for control channels
PCFICH EPRE / ERS [dB]
PHICH
# of PHICH groups
# of PHICH per group
PHICH BPSK symbol power / ERS [dB]
PHICH group EPRE / ERS [dB]
PDCCH
# of available REGs
# of PDCCH
# of CCEs per PDCCH
# of REGs per CCE
# of REGs allocated to PDCCH
# of <NIL> REGs added for padding
PDCCH REG EPRE / ERS [dB]
<NIL> REG EPRE / ERS [dB]
PDSCH
Page 12
Backup slide – E-TM3.2
6.1.1.5 E-UTRA Test Model 3.2 (E-TM3.2)
This model shall be used for tests on:
• Transmitted signal quality
> Frequency error
> EVM for 16QAM modulation
3GPP TS 36.141 V9.0.0 (2009-05)
Table 6.1.1.5-1: Physical channel parameters of E-TM3.2
Parameter
1.4 MHz
Reference, Synchronisation Signals
RS boosting, PB = EB/EA
Synchronisation signal EPRE / ERS [dB]
Reserved EPRE / ERS [dB]
3 MHz
5 MHz
10 MHz 15 MHz 20 MHz
1
1
1
1
1
1
0.000
1.573
2.426
2.426
3.005
2.426
-inf
-inf
-inf
-inf
-inf
-inf
0.000
1.573
2.426
2.426
3.005
2.426
-inf
-inf
-inf
-inf
-inf
-inf
PBCH
PBCH EPRE / ERS [dB]
Reserved EPRE / ERS [dB]
PCFICH
# of symbols used for control channels
PCFICH EPRE / ERS [dB]
2
1
1
1
1
1
3.222
0
0
0
0
0
1
1
1
2
2
3
PHICH
# of PHICH groups
# of PHICH per group
PHICH BPSK symbol power / ERS [dB]
PHICH group EPRE / ERS [dB]
2
2
2
2
2
2
-3.010
-3.010
-3.010
-3.010
-3.010
-3.010
0
0
0
0
0
0
23
23
43
90
140
187
PDCCH
# of available REGs
# of PDCCH
2
2
2
5
7
10
# of CCEs per PDCCH
1
1
2
2
2
2
# of REGs per CCE
9
9
9
9
9
9
# of REGs allocated to PDCCH
18
18
36
90
126
180
# of <NIL> REGs added for padding
5
5
7
0
14
7
0.792
2.290
1.880
1.065
1.488
1.195
-inf
-inf
-inf
-inf
-inf
-inf
4
7
15
30
50
60
-3 (*)
-3
-3
-3
-3
-3
2
8
10
20
25
40
3.005 (*)
1.573
2.426
2.426
3.005
2.426
PDCCH REG EPRE / ERS [dB]
<NIL> REG EPRE / ERS [dB]
PDSCH
# of 16QAM PDSCH PRBs within a slot for
which EVM is measured
PRB PA = EA/ERS [dB]
# of QPSK PDSCH PRBs within a slot for which
EVM is not measured (used for power
balancing only)
PRB PA = EA/ERS [dB]
Note (*): in subframes containing PBCH or synchronisation signal REs, no PRB boosting/deboosting shall be applied, i.e. PRB PA = EA/ERS = 0 [dB]
Page 13
Backup slide – E-TM3.3
3GPP TS 36.141 V9.0.0 (2009-05)
6.1.1.6 E-UTRA Test Model 3.3 (E-TM3.3)
This model shall be used for tests on:
• Transmitted signal quality
> Frequency error
> EVM for QPSK modulation
Table 6.1.1.6-1: Physical channel parameters of E-TM3.3
Parameter
1.4 MHz
Reference, Synchronisation Signals
RS boosting, PB = EB/EA
Synchronisation signal EPRE / ERS [dB]
Reserved EPRE / ERS [dB]
3 MHz
5 MHz
10 MHz 15 MHz 20 MHz
1
1
1
1
1
1
0.000
2.189
2.580
2.427
2.477
2.427
-inf
-inf
-inf
-inf
-inf
-inf
0.000
2.189
2.580
2.427
2.477
2.427
-inf
-inf
-inf
-inf
-inf
-inf
2
1
1
1
1
1
3.222
0
0
0
0
0
PBCH
PBCH EPRE / ERS [dB]
Reserved EPRE / ERS [dB]
PCFICH
# of symbols used for control channels
PCFICH EPRE / ERS [dB]
PHICH
# of PHICH groups
1
1
1
2
2
3
# of PHICH per group
2
2
2
2
2
2
-3.010
-3.010
-3.010
-3.010
-3.010
-3.010
0
0
0
0
0
0
# of available REGs
23
23
43
90
140
187
# of PDCCH
2
2
2
5
7
10
# of CCEs per PDCCH
1
1
2
2
2
2
# of REGs per CCE
9
9
9
9
9
9
# of REGs allocated to PDCCH
18
18
36
90
126
180
# of <NIL> REGs added for padding
5
5
7
0
14
7
0.792
2.290
1.880
1.065
1.488
1.195
-inf
-inf
-inf
-inf
-inf
-inf
3
7
13
25
38
50
-6 (*)
-6
-6
-6
-6
-6
3
8
12
25
37
50
2.427 (*)
2.189
2.580
2.427
2.477
2.427
PHICH BPSK symbol power / ERS [dB]
PHICH group EPRE / ERS [dB]
PDCCH
PDCCH REG EPRE / ERS [dB]
<NIL> REG EPRE / ERS [dB]
PDSCH
# of QPSK PDSCH PRBs within a slot for which
EVM is measured
PRB PA = EA/ERS [dB]
# of 16QAM PDSCH PRBs within a slot for which
EVM is not measured (used for power balancing
only)
PRB PA = EA/ERS [dB]
Note (*): in subframes containing PBCH or synchronisation signal REs, no PRB boosting/deboosting shall be applied, i.e. PRB PA = EA/ERS = 0 [dB]
Page 14
LTE 3GPP Specifications (Rel-8) 36.1XX Radio
Specification Title
TS 36.101
E-UTRA: UE radio transmission and reception
TS 36.104
E-UTRA: Base Station (BS) radio transmission and reception
TS 36.133
E-UTRA Requirements for support of radio resource management
TS 36.141
E-UTRA: Base Station (BS) conformance testing
TS 36.521-1
E-UTRA: UE conformance specification / conformance testing
* key DL and UL documents for PHY layer conformance testing
Introduction to LTE
Page 15
June 15-17, 2009
CCDF 변경 Parameter
1. Signalstudio를
이용하여 Waveform을
generate 함.
2. 화면 하단의 CCDF
값을 확인함.
3. Baseband Post-Filter
Clipping 값을 줄인 후
다시 Waveform을
generate 함.
4. 1~3을 반복하며
CCDF를 감소 시킴.
Post-Filter Clipping
값을 줄이게 되면
신호의 Peak 값이
제거되므로 CCDF 값이
감소 됩니다. 이로
인해 data가 손실되어
EVM 결과가 나빠지게
됩니다.
감사합니다.
관련 문의 : 080-769-0800
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