Global ETD Search

1	Techniques for the synchronisation and demodulation of fast frequency hopped M-ary frequency shift keying Gibbs, Jonathan Alastair January 1991 (has links) No description available. 621.3822 Convolutional encoding
2	Implementation of a Forward Error Correction Technique using Convolutional Encoding with Viterbi Decoding Rawat, Sachin 30 June 2004 (has links) No description available. Convolutional Encoding Viterbi Decoding FEC Coding Technique
3	VITERBI DECODER FOR NASA’S SPACE SHUTTLE’S TELEMETRY DATA Mayer, Robert, McDaniels, James, Kalil, Lou F. 10 1900 (has links) International Telemetering Conference Proceedings / October 26-29, 1992 / Town and Country Hotel and Convention Center, San Diego, California / In the event of a NASA Space Shuttle mission landing at the While Sands Missile Range, White Sands, New Mexico, a data communications system for processing Shuttle’s telemetry data has been installed there in the Master Control Telemetry Station, JIG-56. This data system required a Viterbi decoder since the Shuttle’s data is convolutionally encoded. However, the Shuttle uses a nonstandard code, and the manufacturer which in the past has provided decoders for Shuttle support, no longer produces them. Since no other company produced a Viterbi decoder designed to decode the shuttle’s data, it was necessary to develop the required decoder. The purpose of this paper is to describe the functional performance requirements and design of this decoder. Viterbi decoder Convolutional Encoding Constraint Length Code Generating Polynomials
4	Inexpensive Rate-1/6 Convolutional Decoder for Integration and Test Purposes Mengel, Edwin E., Simpson, Mark E. 10 1900 (has links) International Telemetering Conference Proceedings / October 28-31, 1996 / Town and Country Hotel and Convention Center, San Diego, California / The Near Earth Asteroid Rendezvous (NEAR) satellite will travel to the asteroid 433 Eros, arriving there early in 1999, and orbit the asteroid for 1 year taking measurements that will map the surface features and determine its elemental composition. NEAR is the first satellite to use the rate-1/6 convolutional encoding on its telemetry downlink. Due to the scarcity and complexity of full decoders, APL designed and built a less capable but inexpensive version of the decoder for use in the integration, test, and prelaunch checkout of the rate-1/6 encoder. This paper describes the rationale for the design, how it works, and the features that are included. Rate 1/6 constraint length 15 convolutional encoding convolutional decoding satellite communication satellite telemetry Near Earth Asteroid Rendezvous NEAR
5	Analysis of the effects of phase noise and frequency offset in orthogonal frequency division multiplexing (OFDM) systems Erdogan, Ahmet Yasin 03 1900 (has links) Approved for public release, distribution is unlimited / Orthogonal frequency division multiplexing (OFDM) is being successfully used in numerous applications. It was chosen for IEEE 802.11a wireless local area network (WLAN) standard, and it is being considered for the fourthgeneration mobile communication systems. Along with its many attractive features, OFDM has some principal drawbacks. Sensitivity to frequency errors is the most dominant of these drawbacks. In this thesis, the frequency offset and phase noise effects on OFDM based communication systems are investigated under a variety of channel conditions covering both indoor and outdoor environments. The simulation performance results of the OFDM system for these channels are presented. / Lieutenant Junior Grade, Turkish Navy Multiplexing Brownian motion processes Electrical engineering Frequency offset Phase noise Differential decoding IFFT (Inverse fast Fourier transform) Guard interval FFT MATLAB Additive white Gaussian noise (AWGN) Interleaver Deinterleaver Mobile channels Convolutional encoding Viterbi decoder Probability of bit error Weiner process

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