Abstract
Overlapped time domain multiplexing (OvTDM) is a novel technique for utilizing inter-symbol interference (ISI) to benefit a communication system. We implement the OvTDM technique based on turbo structure and associate a turbo product code (TPC) to construct a novel coded turbo-structure OvTDM system. Two schemes of the iterative receiver and soft-input and soft-output (SISO) decoding algorithms are presented. Simulation results show an attractive advantage and performance of designed structures.
Highlights
It is well known that most traditional communication systems are designed based on Nyquist criterion [1], in which intersymbol interference (ISI) should be avoided between consequent symbols
In the overlapped time domain multiplexing (OvTDM) system, these overlapped parts are never regarded as ISI but rather as a beneficial encoding constraint relationship that can provide corresponding gain
In the OvTDM system, we artificially introduce ISI to form an overlap among different symbols
Summary
It is well known that most traditional communication systems are designed based on Nyquist criterion [1], in which intersymbol interference (ISI) should be avoided between consequent symbols. People tend to design a communication system with controlled ISI, such as Faster-than-Nyquist (FTN) signaling [2] and partial response signaling (PRS) [3] These methods treat the overlap between symbols as interference and do not really utilize it to collect the extra gain. Based on ISI to benefit a communication system, overlapped time domain multiplexing (OvTDM) is proposed in [4]-[7]. Turbo product code (TPC) is employed as the FEC module.
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