Re: [Discuss-gnuradio] Channel estimation in OFDM examples

On 01/18/2016 10:58 AM, Jurgis Aleksandravičius wrote: > I am using the OFDM tx/rx example flowgraphs on USRP N210 radios to get > complex channel coefficients from tags produced by OFDM Channel > Estimation block. I assume you're using the ofdm_tx and ofdm_rx examples. > When I record and plot t

[Discuss-gnuradio] Channel estimation in OFDM examples

Hi, I am using the OFDM tx/rx example flowgraphs on USRP N210 radios to get complex channel coefficients from tags produced by OFDM Channel Estimation block. When I record and plot the channel coefficient in time, I can see that its magnitude is constant, but phase is 'rolling' at a freq

[Discuss-gnuradio] channel estimation project? (LS, dictionary based compressed sensing, matching pursuit, etc.)

Dear All, Do you know any project related to channel estimation e.g., dictionary based compressed sensing, matching pursuit? Thanks in advance! -- NE___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/di

Re: [Discuss-gnuradio] Channel estimation/equalization in OFDM

Martin, Thank you for your reply. Please, check my replies below. >> Mohammed, >> >> you should also check the new OFDM implementation (see >> examples/ofdm/rx_ofdm.grc and python/digital/ofdm_txrx.py). Much more >> modular. >> >> On Wed, Aug 21, 2013 at 11:33:26AM +0200, Mohammed Karmoose wrote:

Re: [Discuss-gnuradio] Channel estimation/equalization in OFDM

Mohammed, you should also check the new OFDM implementation (see examples/ofdm/rx_ofdm.grc and python/digital/ofdm_txrx.py). Much more modular. On Wed, Aug 21, 2013 at 11:33:26AM +0200, Mohammed Karmoose wrote: > However, there are two differences in the implementation in relation to this > equat

[Discuss-gnuradio] Channel estimation/equalization in OFDM

Dear All, I've been trying to investigate how channel estimation works in OFDM based on the implementation provided in Gnuradio for OFDM transmission. I found that it was done in the block digital_ofdm_frame_acquisition.cc/h. As I understand, the digital_ofdm_frame_acquisition::calculate_equalizer

[Discuss-gnuradio] channel estimation

Dear All, I am trying to implement channel estimation in ofdm. I made the attached flow graph and also python file is attached. I used ofdm_mod and demod. blocks, and I edited the "ofdm frame acquistion.cc" to print channel coff. but the displayed taps is incorrect. Regards, Eslam ahmed trial

Re: [Discuss-gnuradio] channel estimation

Hi Eslam, On Fri, Aug 02, 2013 at 04:55:04PM +0200, Eslam Ahmed wrote: > I have been working on channel estimation in ofdm. I used the ofdm mod and > ofdm > demod blocks in gnuradio. I edited the ofdm frame acquistion block to print > the I'm assuming you're using the old blocks? Have you tried

[Discuss-gnuradio] channel estimation

I have been working on channel estimation in ofdm. I used the ofdm mod and ofdm demod blocks in gnuradio. I edited the ofdm frame acquistion block to print the equalizer taps. but the problem is that i only connected ofdm mod and demod together without channel model, and equalizer give me incorrect

Re: [Discuss-gnuradio] channel estimation in gnuradio narrowband

Hi yeran, I am wondering if you have solved this problem? Best Regards, On Wed, May 29, 2013 at 9:43 PM, yeran wrote: > Hi everyone, > > > I’m doing channel estimation in gnu radio narrowband. But the result is > different than I expect. > > > I’m using the example in grc, uhd_tx_dpsk

Re: [Discuss-gnuradio] channel estimation in gnuradio narrowband

Hi Alex, yes, I'm using the original generic_mod_demod.py, and just adding a file_sink after the time_recov block, so there is a freq_recov before. But thanks all the same! :) Ada Date: Thu, 30 May 2013 00:28:45 -0500 Subject: Re: [Discuss-gnuradio] channel estimation in gnuradio narro

Re: [Discuss-gnuradio] channel estimation in gnuradio narrowband

till seems to be with carrier frequency. > > Please correct me if there is a misunderstanding in my thought! > > Thanks! Look forward to your reply!! > > Best, > Ada > > -- > Date: Wed, 29 May 2013 22:27:14 -0500 > > Subject: Re: [D

Re: [Discuss-gnuradio] channel estimation in gnuradio narrowband

t: Re: [Discuss-gnuradio] channel estimation in gnuradio narrowband From: cingular.a...@gmail.com To: yeran0...@hotmail.com; discuss-gnuradio@gnu.org FLL = Frequency lock looping. The corresponding C++ block is digital_fll_band_edge_cc. and you can find the usage example in generic_mod_demod.py in /gnurad

Re: [Discuss-gnuradio] channel estimation in gnuradio narrowband

orward to your reply! > > Ada > > -- > Date: Wed, 29 May 2013 21:55:29 -0500 > Subject: Re: [Discuss-gnuradio] channel estimation in gnuradio narrowband > From: cingular.a...@gmail.com > To: yeran0...@hotmail.com > CC: discuss-gnuradio@gnu.org > > > I don&#x

Re: [Discuss-gnuradio] channel estimation in gnuradio narrowband

I don't think the RRC filter is used for carrier frequency correction. In gnuradio, the FLL filter can be used for CFO correction. Please correct me if I am wrong. On Wed, May 29, 2013 at 9:43 PM, yeran wrote: > Hi everyone, > > > I’m doing channel estimation in gnu radio narrowband. But th

Re: [Discuss-gnuradio] Channel Estimation in benchmark OFDM Code

ially interested in the role of cp_len in this. Thanks, Bogdan   From: Yahya Ezzeldin To: discuss-gnuradio Sent: Tuesday, April 16, 2013 9:21 AM Subject: [Discuss-gnuradio] Channel Estimation in benchmark OFDM Code Dear All, Does the benchmark OFDM

Re: [Discuss-gnuradio] Channel Estimation in benchmark OFDM Code

On Tue, Apr 16, 2013 at 08:21:54AM +0200, Yahya Ezzeldin wrote: > Does the benchmark OFDM Code perform Channel synchronization ? > I am moving through the code however I can't seem to get the part where this > is > done ? > > Can anyone give any pointers regarding this ? > The number of pilots ?

[Discuss-gnuradio] Channel Estimation in benchmark OFDM Code

Dear All, Does the benchmark OFDM Code perform Channel synchronization ? I am moving through the code however I can't seem to get the part where this is done ? Can anyone give any pointers regarding this ? The number of pilots ? Estimation technique used ? Best Regards, -- Yahya Ezzeldin

[Discuss-gnuradio] Channel estimation GSM (GMSK modulation)

Hi Guys, I am interested in real-time channel estimation of a GSM signal. Since GSMK is a non-coherent modulation, performing channel estimation is not easy, at least to me. I have found a paper in which they correct for the 90 degree phase shift in every symbol (multiply by i^k, k'th symbol) befo