Re: how to generate a certain band width white noise

[Ron Economos]

Here's a flow graph that should get you started. The "width" parameter controls the bandwidth of the noise (but can't be greater than the sample rate).

It's using a UHD sink block for an Etttus B210. Use a sink block that's appropriate for your hardware. Also, be sure to disable the throttle and null sink when using hardware.

Ron

On 3/21/21 20:27, james jordan wrote:

Hi Kyeong,

thanks for your reply. what is the default bandwidth for noise source. from my understanding resampler did not modify bandwidth.

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From: Kyeong Su Shin <ksshin@postech.ac.kr>
Sent: Sunday, March 21, 2021 5:17 PM
To: james jordan <james.jordan.999@hotmail.com>; GNURadio Discussion List <discuss-gnuradio@gnu.org>
Subject: Re: how to generate a certain band width white noise

 

Hello Jordan:

Just use a "Noise Source" block and a resampler block (if needed; best be avoided) to adjust the bandwidth.  The quality of your "white noise" will depend on the resampler and the transmitter hardware, though.

Regards,

Kyeong Su Shin

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보낸 사람: james jordan <james.jordan.999@hotmail.com> 대신 Discuss-gnuradio <discuss-gnuradio-bounces+ksshin=postech.ac.kr@gnu.org>
보낸 날짜: 2021년 3월 21일 일요일 오후 12:40
받는 사람: GNURadio Discussion List <discuss-gnuradio@gnu.org>
제목: how to generate a certain band width white noise

 

Hi,

i want to use white noise to test a certain band. such as 2Mhz band width white noise. how to do this?

whitenoise.grc
Description: application/gnuradio-grc