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why increasing ADC resolution can beat intermodulatoin?

时间:04-11 整理:3721RD 点击:
read from a paper that in wireless communicaiton system, if there are strong interference such as an adjacent channel, increasing the front end ADC resolution bits can beat this problem? Why is it?

if you increase the resolution of a tv you get a better picture
starting from here
you soon get to increasing the gain of the front end make it more sensitive
so you also gain here an increase in redability

now imagine an adc output to an array for values across the picture
treat the tv as a grid and you have the usual x y coordinates
and imagine the w vecter streatches behind

each pixel is made say of an 8bit value stored in an 8 bit address 256 by 256 by 256 3d array
each 8 bit value for the block of pixels gives only a certain range
and clarity
so if you double the size to a 65535 by 65535dec array... 16bit
you get a substantial increase in the amount of variables you have at your disposal

and if you then also just use still your 8 bit data
youll get left over plenty of values blocks
for nice things like error correction and counter correction and streaming etc


so increasing the resolution of the front end adc etc will
give far better clarity of actual data transfer given these additions after a redesign

bigger samples are more accurate in terms of numerical size...

as you know most radio data is made up of or uses packets of data and checksums

the less packet loss the better

as for actual interfearance the size relationship in data decoding is choosen as a window
and the adc resolution increase allows you to narrow this window and apply better algrithms that clean up stuff like this using micros

most modern blackbox affairs use this dsp technique also

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