The PC generates a baseband signal which is sent to a radio front end doing the digital to analog conversion. The reverse is done for the reception. Other distributions can be used provided the radio frontend drivers are available for them.
If you are not familiar with screen here is what you must know:. The other Ethernet port can be connected to the local network if necessary. We also assume that you have some Linux and LTE knownledge. In order to install them, do as root user:. Note that linux-image-extra package name may differ depending on your kernel version. To verify that SCTP kernel module is running, do as root user:. Then reboot the PC in case the Linux kernel was upgraded too. If your system does not have compatible version installed you may have this error message at startup:.
In order to get the lowest latency, it is recommended to set up the performance frequency governor for each CPU core. Some buggy drivers are known to block the CPU during a few tens of ms. Other drivers such as Wifi controllers can give the same problem.
In order to avoid such problems, remove all unnecessary peripherals from the PC. Please refer to sub section of your radio frontend to set it up. When configured, you will have to select it See RRH selection. Insert the test USIM card in the device. Enable data connection and roaming in the configuration of your device. If possible, limit the LTE frequency bands used by the device to the one you want to use in order to speed up the network search. The executable lteenb can be launched from this directory.
It uses a superset of the JSON syntax. The main parameter you need to change right now is the actual frequency you want to use. You need to be sure that no interference is present on the frequency you are using and that you have the legal right to use it in most countries it is illegal to transmit on LTE frequency bands without an explicit authorization. In order to reduce interferences, it is recommended to use a high frequency band such as the MHz band band 7 in Europe.
