R110
Joined: 16 Oct 2001
Posts: 64
Location: Iran
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 09 Feb 2006 10:41 OFDM (signal whitening - phase noise generation) ? urgent!!! |
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Hi there
In OFDM transmitter (plz see the attachment file) there is a block with a function that creates a set of random phase vectors, which are used to whiten the transmitterd signal. each mapped data point is multipiled by a random phase to reduce peak to average power ratio of an OFDM data symbol.
the question is:
1. how this fuction can whiten the signal ?
2. how can we recover the signal after multipiling it by a random phase?
3. do you know any other usage for this function?
If you have a paper that explace the fuction of this block ( red part ) in detail. it would be appreciated if you let me know?
thanks in advance
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