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Coordinated design of coding and modulation systems (Document No: 19760018226)
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Johannesson, R. Lee, L. Massey, J. L. Lauer, G. Ancheta, T. |
| Copyright Year | 1976 |
| Description | The joint optimization of the coding and modulation systems employed in telemetry systems was investigated. Emphasis was placed on formulating inner and outer coding standards used by the Goddard Spaceflight Center. Convolutional codes were found that are nearly optimum for use with Viterbi decoding in the inner coding of concatenated coding systems. A convolutional code, the unit-memory code, was discovered and is ideal for inner system usage because of its byte-oriented structure. Simulations of sequential decoding on the deep-space channel were carried out to compare directly various convolutional codes that are proposed for use in deep-space systems. |
| File Size | 3500872 |
| Page Count | 125 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19760018226 |
| Archival Resource Key | ark:/13960/t9g49gm7n |
| Language | English |
| Publisher Date | 1976-06-14 |
| Access Restriction | Open |
| Subject Keyword | Space Communications, Spacecraft Communications, Command And Tracking Viterbi Decoders Deep Space Network Coding Decoding Biternary Code Modulators Optimization Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
