LTE CQI Table Changes

LTE CQI Table Changes

 

The latest release for SignalPro available on May 6th, 2021, will contain several new enhancements and features (please refer to release notes for an extensive list).

One of the new enhancements is for the CQI tables within the 5G and LTE module.

This will affect any user with the LTE module, please read ahead to understand the changes and how to revert if needed. As the new CQI will affect all studies

 

CQI Tables

Signal Pro now supports up to 64 entries in the LTE CQI tables. In addition, the table includes the modulation efficiency metric* and MCS name which can now be edited as per user requirements.

*Note: Modulation efficiency is expressed in bps/Hz and not Mbps as it is in the WiMAX modulation tables.

Modulation region may be assigned QPSK, 16QAM, 64 QAM, and 256 QAM.

 

In the case where the user needs to revert to the CQI table and setting from the legacy table, the following steps should be taken.

The following table(s) need to be entered depending on the table selected in previous versions.

To edit the CQI table, simply navigate to Network Design/Analysis->LTE Networks->System details/Service area:

 

Then, select the CQI Parameters Button

 

 

Enter the values from the following tables.

Active

MCS Name

Modulation Region

Modulation Efficiency (bps/Hz)

SINR (dB)

PA Power Backoff (dB)

TRUE

QPSK

QPSK

0.152344

-6

0

TRUE

QPSK

QPSK

0.234375

-4.5

0

TRUE

QPSK

QPSK

0.376953

-3

0

TRUE

QPSK

QPSK

0.601563

-1

0

TRUE

QPSK

QPSK

0.876953

1

0

TRUE

QPSK

QPSK

1.175781

3

0

TRUE

16QAM

16QAM

1.476563

5

0

TRUE

16QAM

16QAM

1.914063

7.5

0

TRUE

16QAM

16QAM

2.40625

9

0

TRUE

64QAM

64QAM

2.730469

10.5

0

TRUE

64QAM

64QAM

3.322266

12

0

TRUE

64QAM

64QAM

3.902344

14

0

TRUE

64QAM

64QAM

4.523438

16

0

TRUE

64QAM

64QAM

5.115234

18

0

TRUE

64QAM

64QAM

5.554688

20

0

64 QAM Uplink and Downlink Table- Used for uplink when “Use 64 QAM checkbox” is checked and used for downlink when “Use 256 QAM” is unchecked.

Active

MCS Name

Modulation Region

Modulation Efficiency (bps/Hz)

SINR (dB)

PA Power Backoff (dB)

TRUE

QPSK

QPSK

0.152344

-6

0

TRUE

QPSK

QPSK

0.377

-3

0

TRUE

QPSK

QPSK

0.877

1

0

TRUE

16QAM

16QAM

1.4766

5

0

TRUE

16QAM

16QAM

1.9141

7.5

0

TRUE

16QAM

16QAM

2.4063

9

0

TRUE

64QAM

64QAM

2.7305

10.5

0

TRUE

64QAM

64QAM

3.3223

12

0

TRUE

64QAM

64QAM

3.9023

14

0

TRUE

64QAM

64QAM

4.5234

16

0

TRUE

64QAM

64QAM

5.1152

18

0

TRUE

256QAM

256QAM

5.5541

21

0

TRUE

256QAM

256QAM

6.2266

24

0

TRUE

256QAM

256QAM

6.9141

27

0

TRUE

256QAM

256QAM

7.4063

30

0

256 QAM Downlink Table-Used for downlink when “Use 256 QAM” is checked.

Active

MCS Name

Modulation Region

Modulation Efficiency (bps/Hz)

SINR (dB)

PA Power Backoff (dB)

TRUE

QPSK

QPSK

0.152344

-6

0

TRUE

QPSK

QPSK

0.234375

-4.5

0

TRUE

QPSK

QPSK

0.376953

-3

0

TRUE

QPSK

QPSK

0.601563

-1

0

TRUE

QPSK

QPSK

0.876953

1

0

TRUE

QPSK

QPSK

1.175781

3

0

TRUE

16QAM

16QAM

1.476563

5

0

TRUE

16QAM

16QAM

1.914063

7.5

0

TRUE

16QAM

16QAM

2.40625

9

0

TRUE

16QAM

16QAM

2.6015625

10.5

0

TRUE

16QAM

16QAM

3.015625

12

0

TRUE

16QAM

16QAM

3.41015625

14

0

TRUE

16QAM

16QAM

3.703125

16

0

TRUE

16QAM

16QAM

3.703125

16

0

TRUE

16QAM

16QAM

3.703125

16

0

QPSK and 16 QAM Uplink Table- Used for uplink when “Use 64 QAM checkbox” is unchecked.

 

Note; The column for "Modulation Efficiency (bps/Hz)" should only have two significant digits listed.

If the data is presented like below, then you can copy/paste the values directly into the dialog.

o    The user must first select all rows,

o    Then click the 'Delete' button the keyboard.

o    Then hit CTRL-V to paste the data in.

Here is an example of being able to copy/paste the CQI table data:

TRUE

QPSK

0.152344

-6

0

TRUE

QPSK

0.234375

-4.5

0

TRUE

QPSK

0.376953

-3

0

TRUE

QPSK

0.601563

-1

0

TRUE

QPSK

0.876953

1

0

TRUE

QPSK

1.175781

3

0

TRUE

16QAM

1.476563

5

0

TRUE

16QAM

1.914063

7.5

0

TRUE

16QAM

2.40625

9

0

TRUE

64QAM

2.730469

10.5

0

TRUE

64QAM

3.322266

12

0

TRUE

64QAM

3.902344

14

0

TRUE

64QAM

4.523438

16

0

TRUE

64QAM

5.115234

18

0

TRUE

64QAM

5.554688

20

0

 

Also Note; These are EDX Wireless defaults. If user had made changes, they will need to adjust the table and use appropriate values moving forward.

 

If you have any issues or questions, please contact EDX Support.