Hi,
Thank you so much.
I have looked at one sentence "the noise floor is around *−*90dBm" in a
paper.So I want to know whether have some similar measure data about the
noise floor in the general environment indoor not just the noise figure.
Thanks.
2015-12-21 11:22 GMT+08:00 Marcus D. Leech <mle...@ripnet.com>:
> On 12/20/2015 10:16 PM, w xd wrote:
>
> Thanks so much.
>
> "The true noise power" I mean if I don't send anything just use the usrp
> to receive.Because don't have signal in the environment,the receive thing
> using the usrp is the noise.I want to know the power of the
> noise.Thanks.Hope to explain explicit.
>
> Thanks.
>
> That's a very very different question. Just because one side isn't
> sending anything, doesn't mean that your receiver sees *nothing*.
> There's RFI, and at higher frequencies, thermal noise from the
> environment, etc. Hard to come up with a single number for that.
>
>
>
> 2015-12-21 11:04 GMT+08:00 Marcus D. Leech <mle...@ripnet.com>:
>
>> On 12/20/2015 09:58 PM, w xd wrote:
>>
>>> Hi,
>>> I want to know the true noise power(in dbm) of the usrp n210.And
>>> i'm using the sbx and lp0964 antenna.
>>> Do someone have the data?
>>>
>>> Thanks.
>>>
>>> Best Regards,
>>> xs w
>>>
>>> Noise figure depends on frequency and gain setting:
>>
>> http://files.ettus.com/performance_data/sbx/
>>
>> Performance data includes noise figure.
>>
>> Not sure what you mean by "true noise power". But noise figure tells you
>> how much extra noise is added by the device itself.
>>
>> A 3dB noise figure is equivalent to a PSD of -174dBm/Hz.
>> A 5dB noise figure is equivalent to a PSD of -172dBm/Hz.
>>
>> And so on.
>>
>>
>>
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>
>
>
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