# Question about Lte receiver in gnuradio‏

**URL:** <https://www.ruby-forum.com/t/question-about-lte-receiver-in-gnuradio/240467>\
**Category:** GNU Radio\
**Created:** [April 15, 2014, 4:34pm UTC](https://www.ruby-forum.com/t/question-about-lte-receiver-in-gnuradio/240467 "2014-04-15T16:34:15Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Detlef\_R](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/58f4c7/32.png) [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\
**Post date:** [April 15, 2014, 4:34pm UTC](https://www.ruby-forum.com/t/question-about-lte-receiver-in-gnuradio/240467/1 "2014-04-15T16:34:15Z")

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My names is Amado.  
I am student of master of science in the Mexico City. My investigation  
is  
about the physical layer of LTE. I revised the work of lte in gnuradio  
wich  
is excellent.

I have a question about IQ baseband samples of input.

¿What type of samples use?  
¿How obtain the samples of input used in the test of LTE?

I hope you can help me with these questions

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**Author:** ![mayo](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/ee59a6/32.png) [@mayo](https://www.ruby-forum.com/u/mayo)\
**Post date:** [April 15, 2014, 5:03pm UTC](https://www.ruby-forum.com/t/question-about-lte-receiver-in-gnuradio/240467/2 "2014-04-15T17:03:11Z")

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Hi Amado,

> ¿What type of samples use?  
> Mostly people use complex baseband samples. In C++ code in GR their  
> data type is gr\_complex which is a wrapper for std::complex.

> ¿How obtain the samples of input used in the test of LTE?  
> To get those samples you either generate them with a LTE transmitter  
> implementation or you record them. If you want to record them, there  
> are plenty of different options with different capabilites from USRPs  
> to Funcube Dongles to RTL-SDRs.

happy hacking  
Johannes  
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