Convolutional codes with optimum distance spectrum

New convolutional codes with rates 1/2, 1/3, and 1/4 are presented for constraint lengths ranging from 3 to 15. These new codes are maximum free-distance codes. Furthermore, the codes have optimized information error weights, resulting in a low bit-error rate for binary communication on both additiv...

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Veröffentlicht in:	IEEE communications letters 1999-11, Vol.3 (11), p.317-319
Hauptverfasser:	Frenger, P., Orten, P., Ottosson, T.
Format:	Artikel
Sprache:	eng
Schlagworte:	Additive white noise Applied sciences AWGN channels Binary phase shift keying Bit error rate Channels Coding, codes Coherence Convolutional codes Exact sciences and technology Fading Gain Gaussian Gaussian noise Information, signal and communications theory Noise levels Optimization Pairwise error probability Signal and communications theory Signal to noise ratio Systems, networks and services of telecommunications Telecommunications Telecommunications and information theory Transmission and modulation (techniques and equipments) Upper bound
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Beschreibung
Zusammenfassung:	New convolutional codes with rates 1/2, 1/3, and 1/4 are presented for constraint lengths ranging from 3 to 15. These new codes are maximum free-distance codes. Furthermore, the codes have optimized information error weights, resulting in a low bit-error rate for binary communication on both additive white Gaussian noise (AWGN) and Rayleigh fading channels. Improved coding gains of as much as 0.6 dB compared to previously published codes have been observed for coherent BPSK over a Rayleigh fading channel and a wide range of signal-to-noise ratios.
ISSN:	1089-7798 1558-2558
DOI:	10.1109/4234.803468