Realizing a flexible constraint length Viterbi decoder for software radio on a de Bruijn interconnection network

Abstract

Building flexible constraint length Viterbi decoders requires us to be able to realize de Bruijn networks of various sizes on the physically provided interconnection network. This paper considers the case when the physical network is itself a de Bruijn network and presents a scalable technique for realizing any n-node de Bruijn network on an N-node de Bruijn network, where n < N. The technique ensures that the length of the longest path realized on the network is minimized and that each physical connection is utilized to send only one data item, both of which are desirable in order to reduce the hardware complexity of the network and to obtain the best possible performance.

ELM‐based timing synchronization for OFDM systems by exploiting computer‐aided training strategy

“…Flexible constraint has the ability to improve the adaptability to the various demands in practical applications, such as the flexible constraint length Viterbi decoder [37]. For the supervised learning‐based TS leaner, the key insight of introducing the flexible constraint into the design of training strategy is that: increasing the correlation between the training labels and the ground truth labels is helpful to improve the statistical power of the supervised learning‐based TS leaner.…”