In this paper we obtain [60,30,12], [64,32,12], [68,34,12], [72,36,12] doubly even self-dual codes as tailbitting convolutional codes with the smallest constraint length K=9. In this construction one information bit is modulo two add to the one of the encoder outputs and this row will replace the first row in the double circulant matrix. The pure double circulant construction with K=10 is also ...

In this paper, simulation model of OFDM based WIMAX system has been developed using punctured convolutional codes. The bit error rate performance of fixedWIMAX has been carried out for different modulation techniques like BPSK, QPSK, and QAM16 with different code rates 1/2, 2/3, 3/4 in each case of modulation technique. Puncturing is the process of deleting some parity bits from the code-word a...

ABSTRA CT— This paper presents F-ary convolutional codes for optimal decoding of pulse-amplitude-modulated (PAM) sequences over noisy finite intersymbol interference (1S1) channels. We refer to this new class of codes as ‘Optimal Convolutional Codes 9 (OCCS) for a channel in the sense of maximizing the minimum Euclidean Distance (ED), drni., between channel output sequences corresponding to dis...

A construction is described of high-rate RS-like convolutional codes, and a lower bound is given on their free distance. These codes can be used to construct asymptotically good binary convolutional codes. 1. Introduetion I~ a preceding report 4), a class of RS-like convolutional codes was introduced. These codes were obtained only for length n, rate R = kln and constraint length 'll related by...

It is well known that a convolutional code is essentially a linear system def ined over a finite field. In this paper we elaborate on this connect ion. W e will def ine a convolutional code as the dual of a complete linear behavior in the sense of W illems. Using ideas from systems theory, we descr ibe a set of general ized first-order descriptions for convolutional codes. As an application of ...

Forward Error Correction (FEC) schemes are an essential component of wireless communication systems. Convolutional codes are employed to implement FEC but the complexity of corresponding decoders increases exponentially according to the constraint length. Present wireless standards such as Third generation (3G) systems, GSM, 802.11A, 802.16 utilize some configuration of convolutional coding. Co...

Forward Error Correction (FEC) schemes are an essential component of wireless communication systems. Convolutional codes are employed to implement FEC but the complexity of corresponding decoders increases exponentially according to the constraint length. Present wireless standards such as Third generation (3G) systems, GSM, 802.11A, 802.16 utilize some configuration of convolutional coding. Co...

Acknowledgements I would like to thank many people who helped and encouraged me with this work. My advisor, Joachim Rosenthal, worked with me long and patiently so that I could produce this dissertation. My committee members, Heide Gl using-L uerren, Alan Howard, and Juan Migliore, made many suggestions that have improved this work greatly. My academic \siblings", Brian Allen, Roxana Smarandach...

This thesis explores error-correcting codes which can be used in physical unclonable function (PUF) applications. We investigate linear block codes and concatenated codes, which are traditionally used with PUFs, and compare them to convolutional codes using the criteria of error correction capability, decoder hardware requirements, flexibility of code parameters, and code rate. The application ...

From: TM Synchronization and Channel Coding is used to protect the transfer frames against telemetry channel noise‐induced errors. Reference [3] describes the CCSDS Recommended Standard for TM Synchronization and Channel Coding, including specification of a convolutional code, a Reed‐ Solomon block‐oriented code, a concatenated coding system consisting of a convolutional inner code and a Reed‐S...