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#### koxe

- Jan 1, 1970

- 0

I looked nearly one week to find this information, but I failed so I

want to ask this forum for help.

My problem is to calculate the phase noise of a satellite radio link.

The link consists of L-Band up-converter block up-converter, LNB and L-

band downconverter. All these components introduce phase noise, which

I have measured. My question is how can I calculate the resultant

phase noise if I concatinate all blocks.

First consideration:

All blocks are frequency converters based on mixing, hence a

multiplication in time domain will be represented by a convolution of

the frequency domain. So can I convolve all phase noise measuremenst

to obtain the eintire phase noise?

Second consideration:

Phase noise is per definition a phase modulation with noisy character.

represents the magnitude of a spectral line compared to the carrierFrom phase noise measurements I obtained the dBc values, which are

power. So if I simply convolve phase noise measurements I ignore the

character of the phase noise and would assume Gaussian behavior.

So I would be glad to read your oppinoins.