How to simulate multiple LTE user equipments (UE) in uplink with fading channel
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Hi all,
I am trying to simulate LTE uplink with the following configuration: 2 UEs transmit to a single eNB. An UE is close to eNB and the other one is far.
I would like to know if there is some example in LTE system toolbox that shows how to build two uplink signals that use distinct resource blocks at the same time (FDD duplexing). Such that I can simulate one signal through an uplink channel, and simulate the other one in another uplink channel.
The main issue here is how to build an LTE signal composed of these two signals and then decode PUSCH bits from each UE from a single signal RX at eNB (this signal RX is the sum of the two uplink signals received over distinct channels).
Any comments or suggestions are welcome.
Thank you
2 个评论
John BG
2016-4-17
There is an LTE toolbox, would you consider trying it you can install the 30 day trial, you may have to splash some cash but not much if you are student.
回答(2 个)
Kevin
2016-4-27
Hi Leonardo,
On the tx side of the uplink, I am assuming that you are able to create one resource grid for one UE for one subframe. In the context of the LTE toolbox, a resource grid is just a MATLAB matrix and let just call it G1 (for UE1). Most of the elements in this matrix G1 are zero except the elements used for the transmission of PUSCH and PUSCH demodulation reference signal. Then call the function lteSCFDMAModulate() to generate the complex baseband IQ samples from G1. Apply channel fading to this IQ samples.
Now do the same thing for UE2 (of course using different transport block) and you should have another resource grid for UE2. Let call this resource grid G2.
Now you can simply add these 2 IQ samples (going through its own channel fading) and this is your received signal.
Does this make sense? Am I on the right track?
Let try to do the tx and channel first. After that, we can do the rx side.
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ima ne
2017-9-18
Hi Leonardo Ramalho ,i'd like to know if u have realized this type of communication between two UEs and one eNB. I want to simulate minimum two UE ,but don't find any examples.Could u help me! Thank u
1 个评论
giancarlo maldonado cardenas
2021-4-15
HI ima ne.
did you manage to solve any of this problem?
I managed to solve in part, we can get together to develop it.
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