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Design >> Analog Design >> Data Whitening
https://designers-guide.org/forum/YaBB.pl?num=1173854964

Message started by qiushidaren on Mar 13^th, 2007, 11:49pm

Title: Data Whitening
Post by qiushidaren on Mar 13^th, 2007, 11:49pm

Hi dear all,

Let’s talk about Data Whitening, what does it really mean, what’s it used for…What are its disadvantages and advantages?

Regards,
Terry

Title: Re: Data Whitening
Post by hyy95 on Mar 14^th, 2007, 12:06am

let me try,
let's say u r doing wireless communication. u want to send out data thru dac and the other side receive the data thru adc.
here's the question, how do u send out the following data: 00 00 00 00 00 00 00 00 ?
if u don't whiten the data, u'll send out nothing thru the dac, and the other side don't know what u are doing.
by whitening and de-whitening, you can make sure u send out something and the other side can receive what u've sent

Title: Re: Data Whitening
Post by adesign on Mar 14^th, 2007, 2:36am

Data whitening is done in order to randomize the data from highly redundant patterns and to minimize DC bias in the packet. Linear Feedback Shift Registers are used for this purpose.

Title: Re: Data Whitening
Post by qiushidaren on Mar 22^nd, 2007, 8:54pm

Thanks for your guys' replies, could you recommend some good references regarding this issue to me? Your suggestions and recommendations will be appreciated.

-Terry