Engineering topics
Publications and source records attributed to Massey, J. L..
Summary of the most important results so far obtained in the theory of coding for the correction and detection of errors in computer arithmetic. Attempts to satisfy the stringent reliability demands upon the arithmetic unit are considered, and special attention is given to attempts to incorporate redundancy into the numbers themselves which are being processed so that erroneous results can be detected and corrected.
Description of a class of rate 1/2 nonsystematic convolutional codes with the following desirable properties: (1) an undetected decoding error probability verified by simulation to be much smaller than for the best systematic codes of the same constraint length; (2) computation behavior with sequential decoding verified by simulation to be virtually identical to that of the best systematic codes; (3) a ?quick-look-in' feature that permits recovery of the information sequence from the hard-decisioned received data without decoding simply by modulo-two addition of the received sequences; and (4) suitability for encoding by simple circuitry requiring less hardware than encoders for the best systematic codes of the same constraint length. Theoretical analyses are given. These codes have been adopted for use in several forthcoming space missions.
Convolutional coding techniques for data protection
Sequential decoding algorithms and flow charts for convolutional coding techniques
Satellite communications performance improvement by use of multipath signal for channel models including noncoherent FSK
General inverses for linear sequential circuits and continuous dynamical systems
Convolutional coding techniques for data protection
Invertibility of linear time invariant dynamical control systems, discussing L-inverses, sequential circuits, inherent integration, reproducibility, pointwise and functional inverses
Convolutional coding techniques for data protection
Algorithms for convolutional codes and development of linear sequential machines
Linear shift register synthesis algorithm found to coincide with Berlekamp iterative algorithm for decoding BCH codes
Existence and construction of modified L lag inverses solution method for linear dynamical systems
Convolutional coding techniques for data protection
Catastrophic error propagation in convolutional codes
Trunk and tree searching properties of Fano sequential decoding algorithms
Upper and lower bounds for feedback decoding and definite decoding minimum distances of binary convolutional codes
Automata and continuous system theories and relationships between convolutional codes and zero state automata and cyclic codes and zero input automata
Automata and continuous system theories and relationships between convolutional codes and zero state automata and cyclic codes and zero input automata