Mots clés : Code correcteur d'erreurs, Turbocodes en blocs, Décodage entièrement parallèle, Architecture à très haut débit. Abstract This paper presents a new circuit architecture for turbo decoding, which achieves ultra high data rates when using product codes as error correcting codes. This architecture is able to decode product codes using binary BCH or m-ary Reed Solomon component codes. Th...

This article compares the performance of binary turbo codes and Reed–Solomon (RS) codes in an optical communications system employing high-order pulseposition modulation (PPM) and an avalanche photodiode (APD) detector. Despite restriction of the turbo codes to binary alphabets and very simple 4or 8-state encoders, they have coding gains 0.5-dB to 0.7-dB higher than equivalent-rate RS codes whe...

In this paper we analyze the performance in terms of Bit Error Rate (BER) and Frame Error Rate (FER) of a multi-binary turbo coded system over Rayleigh flat fading multipaths channels. The turbo codes (TCs) proposed here calls for the parallel concatenation of two identical rate r/(r+1) recursive systematic convolutional RSC codes. It results rate r/(r+2) Multi-Binary Turbo Code (MBTC). Data bl...

This paper describes a construction technique for q-ary Turbo Codes that computes good recursive systematic convolutional q-ary constituent codes with constraint length ν ≤ 5 for q = 2, m = 2 and 3. The construction technique, based on the algorithm in [5], determines the codes with maximum di for i = 2, 3, and 4 and minimum codeword multiplicity, where di is the minimum weight of all code sequ...

We study the use of turbo-coded modulation for wireless communication systems with multiple transmit and receive antennas over block Rayleigh fading channels. We describe an effective way of applying turbo-coded modulation as an alternative to the current space–time codes with appropriate interleaving. We study the performance with the standard iterative turbo decoding algorithm, as well as the...

Turbo-code is known as the powerful error correcting code. The principle of turbo-code, which is the concatenated convolutional code, makes it possible to control the code rate by the use of the puncturing. When the puncturing is applied, the reliability of the decoded bits is not uniform over a frame, because some bits are decoded using only received information bits, and the others are decode...

Turbo codes are among the most powerful and widely adopted error correcting codes in several communication applications. The high throughput requirements of current and future standards impose that parallel decoders composed by multiple interconnected processing elements are used at the receiver side to efficiently decode turbo codes. In this work, on chip interconnects for multiprocessor turbo...

In this paper we propose the use of Turbo Codes for M-ary pulse position modulated pulses over UWB communication channels with multipath. The transmitted power of the UWB pulses is required to be very small as they are used in the existing spectrum designated to other uses. This constraint requires that UWB signals have good performance at low SNR’s. Turbo codes have been shown to perform well ...

AbsfructThis paper presents a new family of convolutional codes, nicknamed turbo-codes, built from a particular concatenation of two recursive systematic codes, linked together by nonuniform interleaving. Decoding calls on iterative processing in which each component decoder takes advantage of the work of the other at the previous step, with the aid of the original concept of extrinsic informat...

I certify that this thesis satisfies all the requirements as a thesis for the degree of Master of Science. This is to certify that we have read this thesis and that in our opinion it is fully adequate, in cope and quality, as a thesis for the degree of Master of Science in Electrical and Electronic Engineering. Turbo codes are a new class of forward error correcting codes that have proved to gi...