Selectivity and sensitivity in SDR Hardwares

Finally we worked on RTL-SDR and HackRF One and USRP in practical test and different moudlation like GFSK,DVB-T,ATSC,OFDM,DMR.With all of them we can see spectrum, it is not final purpose, we emphasize ,purpose is data in digital radio communication.So which SDR hardware can handle  data extracting with different moudation and protocols like GSM or even LTE and so on.

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DVB-T Gnuradio TX-RX, recording video receiver in bandwidth 1MB and frequency 461M

Today we share recorded video DVB-T receiver here, we use two Hackrf One with Gnuradio, we had 1MB bandwidth and 461M center frequency.In higher bandwidth we had not any ofdm symbol and we had error restart aquisition for more info please see former our blog post this and that link. So really HackRF One in Higher 1MB bandwidth is not good and it can not haldle high carrier modulation.

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Observing Random Jitter in HackRF One in High Bandwidth with High Carrier Modulation

Yet i work on DVB-T in HackRF one, in TX we can send DVB-T and we receive it with a hardware dongle DVB-T. but for receiving with SDR Based we had error: see this link for our older work or this link.

DVBT project receiver probelm OOrestart aquisition d_freq_offset: -5 Od_freq_offset: -5

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Implementation Advanced Encryption Standard (AES) in GFSK in Gnuradio

In this post we want to implent AES encryption in GFSK transmitter/receiver in GnuRadio.So it work i can transmit a mp3 format file with HackRF One.

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Synchronization two Hardware SDR

We now disscuss about synchronization, this subject is one of most important challeneg in multi hardware digital communication.We have two general mechanism for sychronization, hardware based we use external clokc, other way .i.e. software based is same clock recovery.So here we discuss about hardware synchronization implentation,

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Role of Clock Recovery in communication in SDR based application?

We in this blog post want to discuss about CDR. In Digital Communication Clock Role is very important in Receivers and Transmitters. we know that any element in Digital Communication has internal or external clock that work with it as a reference clock. So for overcome lost data as unsynchronization between TX and RX we sould have a solution. Even in same Conditon is hard find two clock has same freqency. Without synchronization we will garbage data in sampleing in Receivers.

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Two HackRF One Doesn’t work in GnuRadio Simultaneously

When we test two HackRFOne for connecting to laptop and running in gnuradio we have a strange observation, we can not see spectrum from two HackRF One  Simultaneously.

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Adapting FM Simulink Matlab for HackRF One

we want to adapt a FM example for  HackRF one,now we want to discuss about challenges and enovations.We use this link for start. So we first start with  a FM broadcast modulator,it can show wave file on spectrum you can see screent shot of it.

 

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