[Hackrf-dev] Tx data rate

[Dominic Spill]

On 20 November 2015 at 04:26, 김상혁 <tkdgur7896 at gmail.com> wrote:
> Hi. I tried to measure throughput of HackRF One
>
> My .grc flow like below:
> Tx)
>         file source(.txt) -> packet encoder -> GMSK MOD -> osmocom sink
> Rx)
>         osmocom source -> GMSK DEMOD -> packet decoder -> file sink
>
> And I could get receiving data rate as bandwidth & Tx power.
> I expected higher throughput as higher bandwidth(1.75MHz to 20MHz) & Tx
> power(10db to -10db), but it didn’t.

Was your signal using more bandwidth?  Or did you increase the Tx/Rx
bandwidth/sample rate settings?  How wide is your data signal?

If you change the bandwidth that the HackRF One hardware is using, you
are no changing the bandwidth of your signal.  If you have maxed out
the data rate of the signal that you are producing, you can look at
other methods of modulation and transmission that can make use of the
increased bandwidth available.  This could include multiple GMSK
channels or using something like OFDM with multiple sub-carriers.

> Also, maximum throughput is limited in my case about 4Mbps.
> I think it because of poor sending data rate.

What do you mean by "poor sending data rate"?  The bit rate of your
GMSK modulation?