On 04/13/2021 10:17 AM, 王璀 WANG Cui wrote:
I am testing with software generated GPS L1 C/A signal and the
sampling rate is 1.023M sps, same as the C/A code rate 1.023M chips/s.
The result baseband signal file can be tracked and positioned by
gnss-sdr receiver.
So I am wondering: I am not us
I am testing with software generated GPS L1 C/A signal and the sampling rate is
1.023M sps, same as the C/A code rate 1.023M chips/s. The result baseband
signal file can be tracked and positioned by gnss-sdr receiver.
So I am wondering: I am not using 2B sampling rate (say 2.046 sps), but seems
On 04/13/2021 12:21 AM, 王璀 WANG Cui wrote:
I am not expert in this, do you mean if sample in real format, we must
double the sample rate, to contain both I phase and Q phase information?
In my application, I just sample at baseband digital code rate
(Nyquist Freq), and seems it works well wh
I am not expert in this, do you mean if sample in real format, we must double
the sample rate, to contain both I phase and Q phase information?
In my application, I just sample at baseband digital code rate (Nyquist Freq),
and seems it works well when transmit. And when I convert it into I/Q, it
No. A real-sampled signal would
Need to be sampled at twice the notional bandwidth. So the data rate is the
same.
Sent from my iPhone
> On Apr 12, 2021, at 11:59 PM, 王璀 WANG Cui wrote:
>
>
> That make sense, I guess I would modify it to accept more format.
> However, for the hardware side,
That make sense, I guess I would modify it to accept more format.
However, for the hardware side, it accept only Complex OTW format, which means
it need double bandwidth from host (I am using B210, USB3). When transmit high
sample rate signal, it is very easy to underflow. If we can upgrade firmw
The tx_samples_from_file application is just an example application. You are
free to modify it to meet your needs, including converting real-samples data to
complex baseband data
The hardware, however, supports complex baseband data, In either sc16 or sc8
format “over the wire”. The host so
Thanks for reply.
However for RF signal, IQ Complex signal double the file size, which is quite
inconvenient, it will be best that USRP can natively support such format. (Even
sometimes RF signal is in 4-bit, 1 bit format, and convert to I/Q will be more
than 10 times larger...)
From: Marcus D
Complex baseband is the natural format for this stuff. If you have real-sampled
data you’ll have to convert it into complex baseband first.
Sent from my iPhone
> On Apr 12, 2021, at 9:32 PM, ?? WANG Cui wrote:
>
>
> Hi,
> When I try tx_samples_from_file example, looks like it only take Comp
