In an effort to achieve bandwidth efficient but reliable communications at lower signal-to-noise ratios, NASA is evaluating its presently developed coding techniques by conducting simulations and tests. These tests will form a basis for comparison of these systems and some newly proposed systems for NASA's coding standards. NASA's present coding standards support convolutional inner codes and Reed-Solomon outer codes. Simulations of coding techniques under development indicate that some variation of convolutional codes with sequential decoding achieve a performance close to that of turbo codes. Compared to the turbo codes these convolutional codes advantages in computational complexity and aspects such as free and open architectures.
A comparison of modified convolutional codes with sequential decoding and turbo codes
1998 IEEE Aerospace Conference Proceedings (Cat. No.98TH8339) ; 4 ; 435-439 vol.4
01.01.1998
413602 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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