Spatially coupled streaming modulation

Abstract

A novel modulation format based on coupling for streaming data transmissions is proposed. The construction utilizes an infinite parity-check matrix of a low-density parity-check convolutional code which is used for data encoding with real-domain addition instead of modulo-two addition. The demodulation and decoding is accomplished using iterative bit estimation and interference cancellation. We demonstrate that the threshold saturation effect of spatial graph coupling holds for the proposed format and the achievable communication rate approaches the additive white Gaussian noise channel capacity and exceeds the capacities of traditional PAM modulations.