Do TRF2443 support 1024QAM + 112MHz bandwidth ?

Roger:

No, the TRF2443 is not suited for 112MHz bandwidth because of the filter bandwidth limitation of the programmable BB RX low-pass filters.  It can support 56 MHz BW of 1024QAM well.  Check out the blog on that subject: https://e2e.ti.com/blogs_/b/analogwire/archive/2014/02/26/qam-modulation-levels-rising-1024-qam-and-beyond.  The BB filter bypass is not an external bypass; it is an internal bypass that still has some BW limitation (~30 MHz).  Hence, maximum signal BW support is limited to under 60 MHz.

For next generation systems I recommend a move to an RF sampling architecture.  This approach can support very wide signal bandwidths and high QAM rates.  The signals are directly converted to an RF band.  From there they can be mixed up to high-GHz range for uwave PP applications.  Check out the ADC32RF45 3-GSPS ADC on ti.com.  There will be a suitable RF DAC made public soon.

--Russell

Hi Russell,

Many thanks to you. Your answer is clear and helpful. Thanks again.

--Roger