[Seerwan]

Dears,
I want to increase the number of antennas at the base station up to 8 in Vienna LTE-A Uplink Link Level Simulator. Any idea is beneficial for me.

Regards

Seerwan

[Stefan Pratschner]

Hi,

the number of receive antennas at the base station is adjusted via the parameter LTE_params.BS_config.nRX.

Please specify your question further, beneficial in what sense?

greetings
Stefan

[Seerwan]

Dear Stefan,

I am grateful for your reply. I have tried to increase LTE_params.BS_config.nRX, but I have found that the max no. of antennas is 4, after 4 the simulator does not work, is it possible to increase LTE_params.BS_config.nRX to be 8 antennas? and what is the modification in the code will be if it is possible ?

Regards

Seerwan

[Stefan Pratschner]

Hi,

which transmission mode do you want to use, single transmit antenna (mode 1) or closed loop spatial multiplexing (mode 4) ?

greetings
Stefan

[Seerwan]

Dear Stefan,

In fact, I want to use 8 antennas at the base station with any mode, for instance, 8 antennas with mode 1 or mode 4 or mode 9.

Thanks

Seerwan

[Seerwan]

Dear Stefan,

In fact, I want to use 8 antennas at the base station with any mode, for instance, 8 antennas with mode 1 or mode 4 or mode 9. is that possible just with changing the settings of parameters or it requires some code modification.Please, I am looking forward to your feedback.

Best Regards

Seerwan

[Stefan Pratschner]

Hi,

please be aware that there is no transmission mode 9 available in the LTE-A uplink LL simulator. There are mode 1, single transmit antenna, and mode 4, closed loop spatial multiplexing, currently available. In either of these modes, modifications in the code are necessary to enable for Nrx=8. I will have a look into that.

greetings
Stefan

[Stefan Pratschner]

Hi,

I had a look at modes 1 and 4.

For mode 4 a number of 8 transmit antennas is actually working without and modification. For mode 1 there is a very small modification necessary:
In LTE_UL_RX.m change line 144 from

 switch BS.nAtPort

to

switch ChanMod.nTX

greetings
Stefan

• This reply was modified 5 years, 4 months ago by Stefan Pratschner.

[Seerwan]

Dear Stefan,

Many thanks for your help and support. It works now.

Stefan, I wonder if it is possible to add RRH to the Uplink simulator?

Best regards,

Seerwan

[Stefan Pratschner]

Hi,

the investigation of RRH deployment aspects is more of an system level simulation task and therefore unfortunately not easy to include in our link level uplink simulator.

greetings
Stefan

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