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Record Details

Record 20 of 14779
Pre-A/D filter and AGC requirements for multimegabit telemetry data detection
Offline Availability: Go to Request Form
Author and Affiliation:
Holmes, J. K.(Jet Propulsion Lab., California Inst. of Tech., Pasadena, CA, United States)
Abstract: A candidate pre-Analog to Digital filter bandwidth versus data rate design is presented for the multimegabit telemetry demodulator/detector. The design is based on considerations of Analog to Digital bias, quantization errors, and automatic gain control effects, as well as the deleterious effects of filtering. Two methods of gain control of the input level to the analog to Digital converter are considered. The first method uses a particular value of gain, according to which bandwidth is selected. The second method uses a second narrowband noncoherent Automatic Gain Controls (in the LPF bandwidth) to attempt to keep the Analog to Digital input level constant. This second method reduces the bit error rate degradation slightly but appears to be more difficult to implement.
Publication Date: Jun 15, 1979
Document ID:
19790016923
(Acquired Nov 15, 1995)
Accession Number: 79N25094
Subject Category: SPACE COMMUNICATIONS, SPACECRAFT COMMUNICATIONS, COMMAND AND TRACKING
Document Type: Technical Report
Publication Information: The Deep Space Network; p 39-46
Publisher Information: United States
Financial Sponsor: NASA; United States
Organization Source: Jet Propulsion Lab., California Inst. of Tech.; Pasadena, CA, United States
Description: 8p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: ANALOG TO DIGITAL CONVERTERS; DEMODULATORS; DIGITAL FILTERS; SIGNAL DETECTORS; TELEMETRY; AMPLIFICATION; BIAS; DEEP SPACE NETWORK; ERROR SIGNALS; SIGNAL TO NOISE RATIOS
Imprint And Other Notes: In its The Deep Space Network p 39-46 (SEE N79-25088 16-12)
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