Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
Hello Montadar my friend, a post from you after a long time. You must be busy.
Here is what I know about the PAPR problem with DS-CDMA.
As you know we have quadrature modulation schemes such as QAM being used in most communication systems these days, so in those systems, it can happen that the I channel and the Q channel can combine constructively to produce a signal which is of a higher value of power as compared to average power of cdma symbols.
This, I think leads to a higher value of PAPR and in order to remove this, both channel are randomized using two different scrambling sequences (CDMA2000, I think)
I think you get the idea, but please verify this as I am kind of rusty on this matter.
Here's a couple of papers, I cannot remember where I retreived them, dealing with PAPR reduction in MC-CDMA, there is an indepth discussion and analysis of PAPR in MC-CDMA systems.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
