Hi,
we had this in the past with DW1000. But with DW3000 the LO leakage is even more pronounced, see here:
The leakage is higher if the Tx power is lower. With maximum power there is no leakage at all. Does anyone have a remendy or the same experience?
Thanks
Georg
Hi @gmichel ,
Yes, it is a known problem for both DW3000 and DW1000 chipsets.
We have a solution to mitigate this problem and will be released in the next SDK. For now, you can try to choose the TX power settings which have no LO leakage visible. Because most of the applications require a high TX power setting to satisfy the -41.3 dBm / MHz limit.
Moreover, this leakage has no impact on the receiver side but may cause some issues when you calibrate the TX power level.
Let us know if you have any issues or progress on this topic.
Kind regards,
Emre
Hello @Emre_Ozbas_Qorvo,
I hope you are having a nice day.
I was wondering if the latest SDK release has indeed mitigated this issue, particularly for the DW3000. If so, do you have any idea how much the leakage has been reduced? Additionally, is it possible to identify which SDK version was used to calibrate a particular pre-certified module (like the DWM3001C)?
Thank you kindly for your time!
Hi @zordon,
Yes, the latest SDK release for DW3000 and QM33 mitigates the LO leakage problem. We implemented a new way of configuring the TX power, called the TX power index. This new way not only provides a leakage-free spectral shape but also a linear TX power dynamic range with 0.25 dB with each step.
DWM3001C modules are calibrated using an internal FW, so I can’t give you this information.
Kind regards,
Emre
