Add week3 notes

week3/27-01-2022/27-01-2022.tex

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+%        File: 27-01-2022.tex
+%     Created: 08:09:38 Thu, 27 Jan 2022 EST
+% Last Change: 08:09:38 Thu, 27 Jan 2022 EST
+%
+\documentclass[letterpaper]{article}
+\usepackage{amsmath}
+\usepackage{graphicx}
+\usepackage{cancel}
+\usepackage{amssymb}
+\usepackage{listings}
+\usepackage[shortlabels]{enumitem}
+\usepackage{lipsum}
+\usepackage{soul}
+\usepackage{geometry}
+
+\geometry{portrait, margin=1in}
+
+\date{01/27/2022}
+\title{%
+        Dithering and Signal Reconstruction\\
+    \large EEET--425--01: Digital Signal Processing}
+\author{Blizzard MacDougall}
+\begin{document}
+\maketitle
+\pagenumbering{arabic}
+
+\section{Review from Last Class}
+Quantization adds noise. This noise std.dev is $0.29$ times the value of the LSB.
+This noise can be reduced by increasing the number of bits in the ADC ($\approx 6dB$ per bit)
+
+\section{Overview for Today}
+Averaging can improve SNR by reducing noise. It doesn't always work though, particularly
+in cases where the signals are small compared to the quantization steps.
+Adding noise through dithering (over-sampling followed by averaging) can improve
+the situation.
+
+
+\end{document}