[SOLVED] who knows TDMA noise.

[nemoium]

tdd noise

i am an electric engineer,my work is to design mobile phone.
i meet the problem of TDMA noise ,who knows how to analysis this problem,
or how to measure it , or anything about it.
thanks


best regards.

 

[wangjianhui]

tdma noise

TDMA noise maybe always mentioned in audio loop.
when a mobilephone is worked ,transmitter enabled once every eight time interval,it's period is about 216.7Hz.so it can be interfere with the audio loop.
We can solve it with good layout in audio loop and in circuits we always shunt a capacitor of 39pf or 47pf iin the route of audio to decrease the noise.

 

[j_caesar]

tdma noise

TDD noise always coming from audio circuit ground ,you can have a try to change
ground point