CDMA channel model in Matlab

cdma model

I'm trying to simulate a CDMA channel for single user in matlab. However, in the channelI want to add interference from other users as well so as to simulated the effect of interference from other users on the current user.
I need suggestion on how to proceed/ implement this model?
How do I model the interference from other users?

Regards
M

You can add multi-user interference effect in many ways.

One of them is to generate interference as the input signal. For example generate random signal for input and generate other random signals as interference in the same way you generate the input. Then you add them up. You can add awgn also. In the receiver part you focus on the first signal you generated. In this algorithm, receiver will accept other signals as interference.

The second way to implement multi-user effect is to use rayleigh or rician modelling.In these models interference and wgn is modelled as one random process.

You can find this implementations in the following books:
*Digital Communications over Fading Channels by M.Simon & M.Alouini
*Simulation of Communication Systems by M.Jeruchim & P.Balaban & K.Shanmugan
*Principles of Communication System Simulation with Wireless Aplications by Tranter