Title :
Conditions for 90° phase-invariant block-coded QAM
Author_Institution :
Res. Center, Deutsche Bundespost Telekom, Darmstadt, Germany
fDate :
4/1/1993 12:00:00 AM
Abstract :
Based on V.A. Zinoviev´s (1981) generalized concatenated codes, conditions for the construction of 90° phase-invariant QAM are derived. Furthermore, a proposal for the necessary differential encoding/decoding is made. The conditions for phase invariance are specialized for the case of Reed-Muller codes as outer codes of the generalized concatenation
Keywords :
amplitude modulation; block codes; decoding; encoding; 90° phase-invariant QAM; Reed-Muller codes; concatenated codes; encoding/decoding; generalized concatenation; outer codes; Codes; Communications Society; Euclidean distance; Hamming distance; Linearity; Quadrature amplitude modulation; Sufficient conditions;
Journal_Title :
Communications, IEEE Transactions on
