On the complexity of bounded distance decoding for the AWGN channel
Författare
Summary, in English
Earlier work has derived the storage complexity of the bounded distance decoder (BDD) for binary-channel convolutional codes. We extend this work to the Gaussian noise channel and to partial-response codes. We show that the storage requirement similar to(2(1-R) - 1)(-t) paths for rate-R convolutional codes over the binary channel becomes similar to2(2Rt) over the Gaussian channel, where the decoder must correct t errors. Thus, convolutional coding over the Gaussian channel is not only 3 dB more energy efficient, but its decoding is simpler as well. Next, we estimate the path storage for partial-response codes, i.e., real-number convolutional codes, over the Gaussian channel. The growth rate depends primarily on the bandwidth of the code. A new optimization procedure is devised to measure the maximum storage requirement in Gaussian noise for these two code types. An analysis based on difference equations predicts the asymptotic storage growth for partial response codes.
Publiceringsår
2002
Språk
Engelska
Sidor
1046-1060
Publikation/Tidskrift/Serie
IEEE Transactions on Information Theory
Volym
48
Issue
5
Dokumenttyp
Artikel i tidskrift
Förlag
IEEE - Institute of Electrical and Electronics Engineers Inc.
Ämne
- Electrical Engineering, Electronic Engineering, Information Engineering
Nyckelord
- decoding complexity
- intersymbol
- partial response coding
- interference reduction
- convolutional coding
- decoding
Status
Published
Projekt
- Informations- och kommunikationsteori: Kodningsteori
Forskningsgrupp
- Informations- och kommunikationsteori
ISBN/ISSN/Övrigt
- ISSN: 0018-9448