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LabVIEW Setup for "Communication Systems Projects with LabVIEW" (m17319)
Author: Ed Doering
Keywords: customize, LabVIEW, options, palettes
Summary: Adjust LabVIEW settings to match those used by the screencast videos in the "Communication Systems Projects with LabVIEW" series.
Subject: Science and Technology
Language: English
Popularity: 75.87%
Revised: 2008-08-13
Revisions: 2
Speaker-Air-Microphone (SAM) Channel Characterization (m18666)
Author: Ed Doering
Keywords: audio communications channel, band limited channel, channel characterization, LabVIEW, microphone, soundcard interface, speaker, speaker-air-microphone channel, wireless communications
Summary: A speaker and microphone connected to a computer serve as an excellent communications channel because the transmitted information is audible. Listening to the channel while making parameter adjustments and viewing plots builds additional insight into the specific modulation scheme under study. This project describes how to characterize a "speaker-air ... modulation techniques.
Subject: Science and Technology
Language: English
Popularity: 79.04%
Revised: 2008-12-10
Revisions: 2
Hamming Block Code Channel Decoder (m18665)
Author: Ed Doering
Keywords: binary symmetric channel, block coding, channel decoder, channel encoder, checkbits, correction power, error control coding, error correction, error detection, generator matrix, Hamming code, Hamming distance, LabVIEW, modulo-2 matrix multiplication, (n,k) block code, syndrome, syndrome table, table lookup decoder
Summary: Channel encoding inserts additional information into a transmitted bit stream to facilitate error detection and error correction at the receiver. Block coding breaks up a bit stream into words of length k bits and appends check bits to form a codeword of length n bits. A corresponding channel decoder examines ... encoder/decoder system.
Subject: Science and Technology
Language: English
Popularity: 79.16%
Revised: 2008-11-29
Revisions: New
Hamming Block Code Channel Encoder (m18663)
Author: Ed Doering
Keywords: binary symmetric channel, block coding, channel decoder, channel encoder, checkbits, correction power, error control coding, error correction, error detection, generator matrix, Hamming code, Hamming distance, LabVIEW, modulo-2 matrix multiplication, (n,k) block code
Summary: Channel encoding inserts additional information into a transmitted bitstream to facilitate error detection and error correction at the receiver. Block coding breaks up a bitstream into words of length k bits and appends check bits to form a codeword of length n bits. A corresponding channel decoder examines the complete ... encoder/decoder system.
Subject: Science and Technology
Language: English
Popularity: 85.55%
Revised: 2008-11-29
Revisions: New
Introduction to the LabVIEW Modulation Toolkit (m18715)
Author: Ed Doering
Keywords: LabVIEW, Modulation Toolkit
Summary: The LabVIEW Modulation Toolkit is an optional add-on to LabVIEW that offers a wide variety of subVIs to quickly and efficiently implement digital and analog communication systems. Many different modulation schemes are supported (PAM, ASK, PSK, FSK, QAM, CPM, and MSK), as are channel impairment models, channel coding, and ... the toolkit.
Subject: Science and Technology
Language: English
Popularity: 93.52%
Revised: 2008-12-03
Revisions: New
Texting Over the Speaker-Air-Microphone (SAM) Channel (m18670)
Author: Ed Doering
Keywords: amplitude shift keying, ASK, bitstream regeneration, bit synchronizer, envelope detector, frame synchronization, LabVIEW, preamble, receiver, receiver filter, speaker-air-microphone channel, text messaging, transmitter
Summary: 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 ... ASK receiver.
Subject: Science and Technology
Language: English
Popularity: 86.37%
Revised: 2008-11-29
Revisions: New
PAM Transmitter and Receiver Implementing Coherent Detection (m18652)
Author: Ed Doering
Keywords: additive white Gaussian noise, AWGN, BER, bit error rate, coherent detection, correlator, Eb/No, integrate-and-dump, LabVIEW, PAM, point-by-point processing, pulse amplitude modulation, signal point mapper, signal to noise ratio, stacked chart, transmit filter
Summary: The integrate-and-dump detector is fundamental to coherent detection, the optimal receiver technique that minimizes bit error rate (BER) for a given signal-to-noise ratio Eb/No. In this project develop a pulse amplitude (PAM) transmitter based on a transmit filter to map a bitstream onto a signaling waveform ... coherent detection.
Subject: Science and Technology
Language: English
Popularity: 93.95%
Revised: 2008-11-29
Revisions: 2
Intersymbol Interference (ISI) and the Eye Diagram (m18662)
Author: Ed Doering
Keywords: channel bandwidth, delay distortion, eye diagram, eye pattern, intersymbol interference, ISI, jitter, LabVIEW, noise margin, raised cosine pulse, rectangular pulse, sinc pulse, timing sensitivity
Summary: This project studies intersymbol interference (ISI) in an intuitive way by using a LabVIEW VI to simulate a pulse transmitter, finite bandwidth channel, and received signaling waveform. Rectangular pulses are considered first to demonstrate the ISI problem, and then two alternative pulse shapes are explored as a way to minimize ... ISI phenomenon.
Subject: Science and Technology
Language: English
Popularity: 92.38%
Revised: 2008-11-29
Revisions: New
Caller ID Decoder (m18708)
Author: Ed Doering
Keywords: bitstream regeneration, Caller ID, channel seizure, data block, demodulator, frames, frequency shift keying, FSK, LabVIEW, local oscillator, MDMF, Multiple Data Message Format, phase lock loop, PLL, steady mark
Summary: The telephone company's "Caller ID" service provides the calling party's directory information as well as the time and date of the call as an FSK (frequency shift keying) signal between the first and second rings of a telephone call. In this project, develop a complete Caller ID decoder ... for display.
Subject: Science and Technology
Language: English
Popularity: 89.15%
Revised: 2008-12-03
Revisions: New
Musical Signal Processing with LabVIEW -- Programming Techniques for Audio Signal Processing (col10440)
Author: Ed Doering
Keywords: arrays, audio files, audio input/output, editing tips, LabVIEW tutorial, programming structures
Summary: After completing this multi-media course you will be well-equipped to start creating your own audio and signal processing applications within the LabVIEW development environment. The modules in this course make extensive use of "screencasts" -- videos captured directly from the computer screen that show the LabVIEW tool in operation ... with LabVIEW".
Subject: Science and Technology
Language: English
Popularity: 93.86%
Revised: 2007-07-18
Revisions: New
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