Examination of Distortion Mechanisms in High Speed Digital Systems

The aim of this project is to explore system-induced distortion mechanisms and analyze their effects on binary and CW signals integrity.
Modern high-speed digital systems require data rates in excess of 1GHz
These rates, and the resulting system bandwidths, pose severe design challenges aimed to minimize the system-induced distortions that affect negatively the binary signal integrity and the ability of the decoding sytem to recover the digital data correctly. The effect on the BER of the system is thus destructive.

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High speed digital systems require data transfer rates equal to or higher than 1GHz.

These rates, and the resulting system bandwidths, pose severe design challenges aimed to minimize the system-induced distortions that affect negatively the binary signal integrity and the ability of the decoding sytem to recover the digital data correctly.

These distortions can originate from both stochastic processes, such as AWGN and phase jitter, or from deterministic, such as signal-shaping effects, multi-path reflections, CW leakage effects and in the case of 2D signals (e.g. QPSK) –  I/Q imbalance.

The aim of this project is to explore the various system-induced distortion mechanisms and analyze their effects on binary and CW signals integrity.

We will show how the signals’ characteristics are affected by those distortion mechanisms, and estimate the signals’ distortion-induced FOMs (Figure of Merits), such as: Frequency estimation errors, SNR (Signal to Noise Ratio), BER (Bit Error Rate), EVM (Error Vector Magnitude), etc., as well as provide various graphs aimed to illustrate those effects such as eye-diagrams, histograms, bathtub pictures and in the case of 2D-signals such as QPSK- constellation diagrams.

Also we will also review the lab experiments conducted to validate the analysys programs   we’ve developed using “real-life” signals.