We present a low-complexity joint demapper-decoder scheme for coherent optical receivers with DQPSK modulation. The new technique reduces to 0.7dB the gap between QPSK and DQPSK in 100Gb/s coherent optical systems.

How categories are represented continues to be hotly debated across neuroscience and psychology. One topic that is central to cognitive research on category representation but underexplored in neurobiological research concerns the internal structure of categories. Internal structure refers to how the natural variability between-category members is coded so that we are able to determine which me...

An alternative method for deriving typicality judgments, applicable in young children that are not familiar with numerical values yet, is introduced, allowing researchers to study gradedness at younger ages in concept development. Contrary to the long tradition of using rating-based procedures to derive typicality judgments, we propose a method that is based on typicality ranking rather than ra...

It is found that when we name an object or a face, we often use basic level name (e.g., dog) rather than a name at superordinate level (e.g., animal) or subordinate level (e.g., Labrador). In addition, although abundant evidence generally suggested that both familiarity and typicality influence object recognition, how each of the two factors involves categorization in terms of naming is not ful...

We propose the new group metric (GM) soft-decision decoder for convolutionally coded synchronous multiple-access channels. The GM decoder exploits the independently operating encoders of the multiuser channel by making decoding decisions for a subset of the users, but incorporating all the multiuser information in its metrics. For a single user, this decoder will have a reduced complexity that ...

This study investigated the processing of lexical stress in native and non-native speakers of English. Specifically, we examined stress typicality effects (where typicality is defined on the basis of grammatical category) in disyllabic words using two on-line tasks. Our grammatical classification experiment showed an overall effect of stress typicality in non-native speakers but no overall effe...

In this paper, we consider the notions of similarity, typicality and prototype for numerical data, i.e. vectorial data belonging to R. We study the relationships between these notions and examine various possibilities to define similarity, to deduce typicality from similarity and prototypes from typicality, underlining the semantics and the interpretation of each considered method.

The present study investigated the influence of medical expertise, case typicality, and illness script component (enabling conditions vs. consequences) on the speed of case information processing and subjective disease probabilities. It was hypothesized that expert subjects would process case information faster than nonexpert subjects, that typical information would be processed faster than aty...