USRP B210 for 2x2 MIMO support

I'm trying to transmit data from two TX ports on a B210 USRP to another B210 USRP device for reception. However, the TX/RX B port doesn't seem to be working. On the receiving device, I only receive the signal from the TX/RX A port. I've tried transmitting signals on each port, but I only receive the signal from the TX/RX A port. Please help me!

Below is my program.

txRadio = comm.SDRuTransmitter( ...
    'Platform',            'B210',         ...
    'SerialNum',           serialNum,      ...
    'ChannelMapping',      [1 2],          ...
    'CenterFrequency',     2450e6,    ...
    'Gain',                60,        ...
    'MasterClockRate',     30.72e6,   ...
    'InterpolationFactor', 8);

comm.SDRuTransmitter requires one of the following:
Wireless Testbench Support Package for NI USRP Radios
Communications Toolbox Support Package for USRP Radio

[Karunya Choppara]

Hi,

The error message shows that the required support package is not installed. have you installed the Communications Toolbox Support Package for USRP Radio?

Also how did you check that port B doesnt work? have you observed the LED status while transmitting and receiving?

Is this a B210 radio or B200 radio? can you provide the output of findsdru

[Hua]

Hi,

I have already installed the Communications Toolbox Support Package for USRP Radio, so I am not quite sure why that error message appeared in my post.

Regarding the ports, I checked the TX/RX B port and the LED does light up during operation. However, when I use a separate USRP unit to receive the signal, I only get a response from Port A. Interestingly, when I test the hardware using Python, both ports work perfectly fine, which suggests the hardware itself is functional. I also tried the USRP B210 Ettus and got similar results.

Here is the output from the findsdru command:

>> findsdru
Checking radio connections...
    Win32; Microsoft Visual C++ version 1936; Boost_107800; UHD_4.2.0.0-vendor

---------- see libuhd version information above this line ----------

ans = 

struct with fields:

Platform: 'B210'
IPAddress: ''
SerialNum: '000000652'
Status: 'Success'