Re: QPSK in forward link

"karthikbalaguru" <karthikbalaguru79@gmail.com> wrote in message
news:0c142441-9cd7-4c59-9e83-2fa859622020@s19g2000prg.googlegroups.com...

> Is there any reason using QPSK in the forward link transmission and
> OQPSK in the reverse link transmissions ?

OQPSK is more tolerant to the nonlinear power amplifiers then QPSK, hence it
allows for better efficiency. However the receiver for OQPSK is more complex
then the receiver for QPSK. So, it makes sense to use the QPSK in downlink
(where there are no limitations) and the OQPSK in uplink (where everything
is limited).

Vladimir Vassilevsky
DSP and Mixed Signal Consultant
www.abvolt.com