NDLI: Digital test signal generation: an accurate snr calibration approach for the dsn (Document No: 19940019439)

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Digital test signal generation: an accurate snr calibration approach for the dsn (Document No: 19940019439)

Content Provider	NASA Technical Reports Server (NTRS)
Author	Gutierrez-Luaces, Benito O.
Copyright Year	1993
Description	In support of the on-going automation of the Deep Space Network (DSN) a new method of generating analog test signals with accurate signal-to-noise ratio (SNR) is described. High accuracy is obtained by simultaneous generation of digital noise and signal spectra at the desired bandwidth (base-band or bandpass). The digital synthesis provides a test signal embedded in noise with the statistical properties of a stationary random process. Accuracy is dependent on test integration time and limited only by the system quantization noise (0.02 dB). The monitor and control as well as signal-processing programs reside in a personal computer (PC). Commands are transmitted to properly configure the specially designed high-speed digital hardware. The prototype can generate either two data channels modulated or not on a subcarrier, or one QPSK channel, or a residual carrier with one biphase data channel. The analog spectrum generated is on the DC to 10 MHz frequency range. These spectra may be up-converted to any desired frequency without loss on the characteristics of the SNR provided. Test results are presented.
File Size	512470
Page Count	6
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19940019439
Archival Resource Key	ark:/13960/t7dr7s05m
Language	English
Publisher Date	1993-03-01
Access Restriction	Open
Subject Keyword	Communications And Radar Phase Shift Keying Deep Space Network Signal To Noise Ratios Calibrating Prototypes Space Communication Signal Processing Signal Generators Channels Data Transmission Personal Computers Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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