I have recently learned about arithmetic multiplication and the various types of multipliers used in digital circuit design. Now, having an interest in cellular technology, I am curious about the applications of these multipliers in 5G circuits. For example, I have done some research and found that they can be used in the minimum-mean-squared-error minimization in MIMO receivers. Where else would I find arithmetic multiplication being performed in cellular technology?
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2 Answers
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Multiply-accumulate is a basic operation of most signal processing algorithms. It's found pretty much any place signal processing is performed - filtering, correlation, normalization, Discrete Fourier Transform, etc.
answered Mar 30, 2020 at 23:01
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Some older (GSM) receivers would perform a gradual phase-de_rotation along the 500 bit packet.
This would use I+Q products in the Intermediate Frequency channels, once digitized.
This would have eased the system-level spec on close-in phase noise.
answered Mar 30, 2020 at 23:04