Turbo synchronization : an EM algorithm interpretation - Communications, 2003. ICC '03. IEEE International Conference on

Turbo synchronization: an EM algorithm interpretation

This paper is devoted to turbo synchronization, that is to say the use of soft information to estimate parameters like carrier phase, frequency offset or timing within a turbo receiver. It is shown how maximum-likelihood estimation of those synchronization parameters can be implemented by means of the iterative expectation-maximization (EM) algorithm [1]. Then we show that the EM algorithm iter...

Construction of coset-based low rate convolutional codes and their application to low rate turbo-like code design - Communications, 2003. ICC '03. IEEE International Conference on

In this paper, we propose a novel method to construct low rate recursive convolutional codes. The ‘overall’ convolutional code has a block code and a simple recursive convolutional code as building blocks. The novelty of this type of convolutional code is that it uses coset leaders in order to distinguish the signals that originate from different states. Several of these codes are then used to ...

Superposition turbo TCM for multi-rate broadcast - Communications, 2003. ICC '03. IEEE International Conference on

Bergmans and Cover identified the capacity region of the Gaussian degraded broadcast channel, where different receivers observe the transmitted signal with different signal to noise ratios. This paper presents a superposition turbo coding scheme that performs within 1 dB of the capacity region boundary of the degraded broadcast channel at BER of 10−5. Performance is consistent over the entire u...

Detection with particle filtering in BLAST systems - Communications, 2003. ICC '03. IEEE International Conference on

This work demonstrates the use of particle filtering for detection in BLAST systems. A novel dynamic state-space model (DSSM) is constructed for BLAST systems that is crucial for development of particle filtering algorithms. The proposed DSSM is based on QR decomposition and the output of the feedforward filter, and it evolves in space. The particle filtering solution does not suffer from error...

MAP symbol estimation on frequency-flat Rayleigh fading channels via a Bayesian EM algorithm