What if digital

After the converters, in fact, after the quantizer portion of the converters, the signal becomes digital, and together with the subsequent FPGA or ASIC, we called this the digital IF stage.

The common term for individual digital signal processing blocks in this stage is the DUC digital upconverter for T x path and the DDC digital downconverter for R x path. An exception is in a direct RF architecture where data converters sample RF signals directly, so the analog IF stage will be omitted and the signal chain will consist of the RF stage and digital IF stage only.

A typical DDC module includes the carrier selection, frequency downconverter, filter, and decimator. These function blocks work in sequence or can be bypassed respectively and finally generate a complex signal at dc or a real signal based on the requirements of the following FPGA or ASIC with lower sampling rates. A typical DUC module includes interpolation, a filter, a frequency upconverter, and a carrier combiner. Independent DDCs and DUCs requires dealing with multiple carriers in parallel and combining them together before outputting the transmission signal or separating them in the received signal.

In the R x chain, higher sampling rates are necessary to avoid signal aliasing, easy analog filter design, and to provide wider signal band. To choose the desired carriers from interferences blockers and other carriers , the output frequency of an NCO is mixed with input IF signal to shift the desired carriers to dc.

An Interview With Robert Nelms. In this episode, Kim talks with Robert Nelms of Assurant about the importance of empathy when it comes to digital strategy and leadership. In this episode, they discuss how strategy and execution are often misunderstood in digital and explain how to bring them together to move faster.

An Interview with Arvind Murali. An Interview with Jeff Small. Kim interviews Jeff Small, Director of Mobile Product Strategy at Perficient about the evolution of digital product management and how organizations can think about digital products as a transformational strategy.

An Interview with Jon Bostock. In a world where retail has changed and consumers remain at home, how do brands reimagine the task of getting products to customers?

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Expand your mind, and expand your future. Dan Abelow is an American inventor, author, speaker and technology consultant. Skip Article Header. Skip to: Start of Article. One day greatness will be in our grasp. But rather than waiting, can we reach it now?

Clearly, there is room to dream about new technology.