How to Evaluate Multiple Access Interference in Time-Hopping PPM Systems?

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T.Engineer
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in order to evaluate the Multiple Access interfernce should I find the mean and variance for the transmitted Signal?
Thanks a lot!
 

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At least those, though often it's necessary to look at
other aspects of things like the signal crosscorrelations,
the protocol retry algorithms / protocol timings / packet or
transmission burst lengths, FEC coding, probability of
simultaneous transmissions, etc. etc.

Basically it depends a lot upon the protocols, the
modulation schemes, and the configurations of the
transmitters/receivers what the actual interference
statistics will be.
 
xez said:
At least those, though often it's necessary to look at
other aspects of things like the signal crosscorrelations,
the protocol retry algorithms / protocol timings / packet or
transmission burst lengths, FEC coding, probability of
simultaneous transmissions, etc. etc.

Basically it depends a lot upon the protocols, the
modulation schemes, and the configurations of the
transmitters/receivers what the actual interference
statistics will be.

Please, what do you mean by Protocols?
I am going to use Pulse Position Amplitude Modulation and correlation receiver.
and if I will find the crosscorrelation for the transmitted signal, what it will be the point?
So, what I have to do?
Thanks a lot!
 
T.Engineer said:
Please, what do you mean by Protocols?
I am going to use Pulse Position Amplitude Modulation and correlation receiver.

You said "multiple access", so xez and I assume you mean multiple transmitters colliding a a receiver. There must be some protocol for multiple access (CSMA, TDMA, etc.), so you must factor the protocol into your calculations.
 
yes exactly.
I am going to use Time Hopping format for multiple access and multipath Fading Channel model.
if you want any other information, please tell me.
Thanks a lot!
 
In other word I'd like to evaluate the multiple access interference for a communication system using time hoping format and Bi- orthogonal pulse position modulation or pulse position modulation.
So, generally What I should do?