# Block Diagram of Transmitter and Receiver with Channel [duplicate]

I am trying to create a dia gram like that.

I am here till now, can someone help?

\documentclass[12pt,a4paper]{article}
\usepackage{circuitikz}
\usetikzlibrary{positioning}
\usetikzlibrary{shapes,arrows}
\tikzset{block/.style = {draw, fill=white, rectangle,
minimum height=3em, minimum width=2cm},
input/.style = {coordinate},
output/.style = {coordinate},
pinstyle/.style = {pin edge={to-,t,black}}
}
\begin{document}
\begin{tikzpicture}[auto, node distance=2cm,>=latex']