A binary ASK transmitter and receiver is designed to transmit digital information over a "speaker-air-microphone" (SAM) channel. Listening to the channel while making parameter adjustments and viewing plots builds additional insights into the ASK modulation scheme. This project describes the various tradeoffs affecting bandwidth and information rate and provides an application for the pulse shapping transmit filter.
Communication Systems Projects with LabVIEW features ten project activities in digital communication systems based on the LabVIEW graphical dataflow programming platform. Each project includes introductory material in the form of text and narrated screencast videos, specifications for low-level subVI building blocks, and step-by-step instructions to assemble application VIs to implement a variety of simulations, visualizations, and working transmitters and receivers. This textbook organizes the projects into related topics, including: (1) Simulation and Visualization of Fundamental Concepts, (2) Channel Coding and Error Control, (3) FSK Demodulation (Caller ID), and (4) Bandpass Communications over the Speaker-Air-Microphone Channel.
lets students correspond with government historians via email. Historians' names and addresses are listed by expertise with an emphasis towards those researching the national parks, the National Park Service, and American history.
Texting and instant messaging are familiar and popular communication techniques. Text messages composed of ASCII characters, with each character composed of eight bits, ultimately form a stream of bits transmitted from the source to the receiver. Normally the text message moves through a complex data network, and the user only sees the endpoints of the system. In this project, however, you will be able to follow the text message on its complete journey through a binary ASK transmitter, a speaker-air-microphone (SAM) channel, and a binary ASK receiver.
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