[Discuss-gnuradio] root_raised_cosine principle

Hi, I get the source code of root_raised_cosine function in gr_firdes.cc, but I can't understand why it writes in that way, is there any paper can give me more details about the principle of root_raised_cosine Thank you this is the source code of root_raised_cosine vector gr_firdes::root_raised

Re: [Discuss-gnuradio] Looking for DSSS demodulator

Hi Martin: Where is the out-of-tree modules, can you give an exactly link? thank you 2013/11/19 Martin Braun (CEL) > On Tue, Nov 19, 2013 at 10:52:39PM +0800, adream wrote: > >Does gunradio provide modules for dealing with DSSS (direct sequence > spread > > spectrum

Re: [Discuss-gnuradio] Looking for DSSS demodulator

Thank you 2013/11/19 Martin Braun (CEL) > On Tue, Nov 19, 2013 at 10:52:39PM +0800, adream wrote: > >Does gunradio provide modules for dealing with DSSS (direct sequence > spread > > spectrum) signals directly? > > Thank you > > Hi adream, > > GNU Ra

[Discuss-gnuradio] Looking for DSSS demodulator

Hi: Does gunradio provide modules for dealing with DSSS (direct sequence spread spectrum) signals directly? Thank you ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

[Discuss-gnuradio] question about symbol synchronization for BPSK demodulation

Hi guys, I'm learning BPSK demodulation recently. I have learned how to do the carrier synchronization in the file of digital_costas_loop_cc.c. so my question is which classes do the symbol synchronization in the gnu radio. thank you very much. ___ Di

[Discuss-gnuradio] question about advance_loop function in gri_control_loop.cc

hello, the function of advance_loop and update_gain is defined as follow in gri_control_loop.cc void gri_control_loop::update_gains() { float denom = (1.0 + 2.0*d_damping*d_loop_bw + d_loop_bw*d_loop_bw); d_alpha = (4*d_damping*d_loop_bw) / denom; d_beta = (4*d_loop_bw*d_loop_bw) / denom; }

Re: [Discuss-gnuradio] can't find block "uhd_usrp_souce"

> > Did you install UHD at all? > > Yes, I have installed UHD, but it still has this problem! Thank you ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

[Discuss-gnuradio] looking for the c++ source for "WBFM Receive" Block

hello, Can anyone tell me the c++ source for "WBFM Receive" Block? Thanks ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

[Discuss-gnuradio] can't find block "uhd_usrp_souce"

hello, I build gnuradio by source, my gnuradio version is 3.6.3,and only one test faild The following tests FAILED: 120 - qa_ctcss_squelch (Failed) Errors while running CTest when I try to open the "uhd_wbfm_receive.grc", it print error: Loading: "uhd_wbfm_receive.grc" >>> Error: Block key "u

Re: [Discuss-gnuradio] Basic question about carrier synchronize in PM demodulation

May be I have not explain my question well, and make others feel confuse. The input signal can be expressed as Fc=cos(2*pi*fc*t+a(t)), where fc is the frequency the carrier, and a(t) is the information which modulated into carrier. But the SDR(software define radio) doesn't deal with the Fc directl

[Discuss-gnuradio] make test error

hello everyone, I try to install gnuradio by source code, the version is 3.6.3. my operation system is Ubuntu 12.04. and I get this error while running make test The following tests FAILED: 120 - qa_ctcss_squelch (Failed) Errors while running CTest thanks for any reply. __

[Discuss-gnuradio] Basic question about carrier synchronize in PM demodulation

Hello everyone, let me explain my question: Let the input signal,Fc=cos(2*pi*fc*t+a(t)),fc is the carrier's frequency,and a(t) is the information which modulated into the carrier. But the SDR(software define radio)doesn't processes the input signal Fc directly, it just deal with the I/Q signal. Mul

Re: [Discuss-gnuradio] How to get the carrier's frequency offset in PM demodulator?

I am feel sorry for no reply 2013/1/30 adream > Does gnuradio provide this function? > thank you > > > 2013/1/29 adream > >> Hello, >> I am learning PM Demodulation, and someones tell me that the FM >> Demodulator in gnuradio can demodulate the PM sig

Re: [Discuss-gnuradio] How to get the carrier's frequency offset in PM demodulator?

Does gnuradio provide this function? thank you 2013/1/29 adream > Hello, > I am learning PM Demodulation, and someones tell me that the FM > Demodulator in gnuradio can demodulate the PM signals. > I want to get the carrier's frequency offset in PM demodulating, does > g

[Discuss-gnuradio] How to get the carrier's frequency offset in PM demodulator?

Hello, I am learning PM Demodulation, and someones tell me that the FM Demodulator in gnuradio can demodulate the PM signals. I want to get the carrier's frequency offset in PM demodulating, does gnuradio provide this function? For example, in my project, I set the frequency of IF signal is 70MHz,

[Discuss-gnuradio] looking for PM demodulator

Hello, I am learning the technology of PM demodulation, so I want to read the PM demodulator's souce code, but I don't know how to find these file in the gunradio's source code. can anyone tell me which files do these work? thank you ___ Discuss-gnuradio