On 08/16/2011 11:32 PM, Page Jack wrote: > my USRP N200 sometimes receive data wrong, I don't know where is the > problem in my application or > in hardware? So I wonder what ethernet protocol does usrp use and is > it reliable to transmit data? > > Regards! > > > Do you mean samples are received incorrectly, or your high-level data packets are received incorrectly.
The transport protocol used is based on UDP, which has no inherent error-recovery mechanism, but when carried over a local ethernet connection, should have a vanishingly-tiny error rate. Vastly more likely that UHD-level UDP packets will get dropped due to buffer resource issues than actual data errors on the packets. Keep in mind that what UHD "carries" is just samples of an analog phenomenon. While it carries those samples quite faithfully, the samples themselves may be distorted in many different ways that affect their "fidelity". -- Principal Investigator Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org
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