Dear all,
After finishing the circuit design for building blocks, how do I simulate  the overall performance of the whole IRUWB receiver (Noise Figure...)?  Can I simulate the whole receiver together, or first simulate the blocks before multiplier, and then the blocks after the multiplier?


My IR-UWB receiver obtains 1st order gaussian pulse (3-5GHz) from attenna, and the receiver contains a LNA, a multiplier, low pass filter, VGA and comparator. (The 2 inputs of multiplier are the same signal from LNA, since we use energy detection method. So there is no Local oscillator.) The recovered signal is around 100MHz.


I am wondering how to simulate this wideband pulse signal? since the carrier frequency contains very rich harmonic components (from 100MHz to 5GHz).  The pulse at the input of LNA can be considered as modulation of 5GHz sinus signal and 100MHz gaussian signal. (or high frequency signal with gaussian envelope). But after the multiplier and Low pass filter, I get a pulse with freq components below 100MHz( unfortunate it is not a single frequency signal)

PSS/Pnoise with single beat freq is not enough,  how do I simulate this pulse which contains wide frequency components?


Many thanks for any idea!

Yes, I created VerilogA models during system-level design.

I was told that transient noise analysis is suitable to analyze the noise of  this kind of wideband receiver. Does anyone know how to use it?

I followed the Cadence application note of transient noise analysis, but it tell only how to calculate the output spectrum, and no noise figure or output noise  result is given.

Kind regards
Bo