ABSTRACT In this paper, we investigate the performance of Turbo Trellis Coded Modulation (TTCM) over AWGN, and Rician channels and assume that phase disturbance is available. As we know Turbo Trellis Coded Modulation (TTCM) is similer to binary turbo codes, but employs Trellis Coded Modulation (TCM) codes which include multi-dimensional codes. The combination of turbo codes with trellis codes l...

Classical Turbo code suffers from high error floor due to its small Minimum Hamming Distance (MHD). Newly-proposed 3D-Turbo code can effectively increase the MHD and achieve a lower error floor by adding a rate-1 post encoder. In 3D-Turbo codes, part of the parity bits from the classical Turbo encoder are further encoded through the post encoder. In this paper, a novel Bit-Interleaved Coded Mod...

Coherent detection of received signals is required for turbo decoding. In this paper, we combine iterative channel estimation with Turbo decoding. Two combinations are considered in this paper. One is called outer-turbo channel estimation (OTCE), in which iterative channel estimation is carried out before turbo decoding. The other is called inner-turbo channel estimation (ITCE), in which channe...

The turbo decoding algorithm is a high-dimensional dynamical system parameterized by a large number of parameters (for a practical realization the turbo decoding algorithm has more than 10 variables and is parameterized by more than 10 parameters). In this chapter we treat the turbo decoding algorithm as a dynamical system parameterized by a single parameter that closely approximates the signal...

In Wyner-Ziv video coding (WZVC), powerful error correcting codes must be used to achieve high compression efficiency; turbo codes are the most commonly used error correcting codes in WZVC. To improve the turbo coding performance in the context of WZVC, this paper proposes a probability updating technique (PUT) acting as an outer loop of the common turbo decoding operation. Whenever a turbo dec...

We investigate the performance of turbo interference cancellation receivers in the space time block coded (STBC) direct-sequence code division multiple access (DS-CDMA) system. Depending on the concatenation scheme used, we divide these receivers into the partitioned approach (PA) and the iterative approach (IA) receivers. The performance of both the PA and IA receivers is evaluated in Rayleigh...

121 Generalized Versions of Turbo Decoding in the Framework of Bayesian Networks and Pearl's Belief Propagation Algorithm Peyman Meshkat and John D. Villasenor Electrical Engineering Department University of California, Los Angeles Abstract| We use the framework of Bayesian networks to introduce generalizations of the traditional turbo decoding algorithm. We show that traditional turbo decoding...

In iterative equalization and decoding (\turbo-detection") the \turbo{principle" is used for detection of coded data transmitted over a frequency selective channel. Due to the burst and interleaver structure the turbo-detection scheme cannot be adopted to the GSM without modiications. We present some possibilities to adopt turbo detection to TDMA systems with inter-block-interleaving like GSM a...

Turbo decoding techniques achieve near-optimal performance in terms of Bit Error Rate (BER) at low Signal to Noise Ratios (SNR's). Amongst these techniques, convolutional turbo codes and product turbo codes are nowadays the most common ones. They have already been selected as a standard for the Universal Mobile Telecommunication System (UMTS) [Lit. 4]. In the future, they will probably also be ...

Turbo codes, formed by the parallel concatenation of two recursive systematic convolutional component codes separated by an interleaver, have been proposed for use in a variety of wireless applications, including mobile, satellite and fixed wireless systems. Analysis of their performance requires knowledge of their transfer function, which conveys their distance properties. Using the transfer f...