Ok.
The block diagram in most of the textbook says the modulated signal is
multiplied with the PN sequence.
1. If I decide to do the same then my setup will look like this
byte -> bytes_to_chunks -> chunks_to_symbols(BPSK) -> rrc_filter(X
samples per bit) -> DSSS
I am confused about the DS
On Wed, 2010-04-28 at 11:23 -0700, Johnathan Corgan wrote:
> On Tue, Apr 27, 2010 at 21:19, John Andrews wrote:
>
> > If I want to transmit a signal which is DSSS spread using BPSK. Is it
> > correct for me to first digitally spread the incoming data bits and then
> > apply BPSK before sending it
On Tue, Apr 27, 2010 at 21:19, John Andrews wrote:
> If I want to transmit a signal which is DSSS spread using BPSK. Is it
> correct for me to first digitally spread the incoming data bits and then
> apply BPSK before sending it to the USRP or should I first convert the
> signal to BPSK and then
this would be similar to 802.11b's PHY at 1Mbps, except it uses the barker
sequence as opposed to the sequence you mention. It spreads a BPSK signal
using the barker sequence.
You can take a look at the BBN 802.11b code in CGRAN to see how they
implement this:
https://www.cgran.org/browser/projec
