Message Passing Based Demodulation of the Time-Encoded Digital Modulation Signal

TL;DR

This paper introduces a message passing algorithm for real-time demodulation of time-encoded digital signals, offering low latency and scalable computational complexity compared to traditional methods.

Contribution

It presents a novel message passing based demodulation algorithm that processes spikes directly, enabling efficient and low-latency decoding of time-encoded signals.

Findings

Linear computational complexity with respect to symbols

Faster demodulation compared to pseudo-inverse methods

Supports real-time processing of time-encoded signals

Abstract

This letter proposes a Message Passing (MP) based algorithm for demodulating the time-encoded digital modulation signal. The proposed algorithm processes the spikes generated by the Time-Encoding Machine (TEM) directly on a per-spike basis, which enables "on-the-fly" demodulatio with low latency. The computational complexity of our proposed method scales linearly with the number of demodulated symbols, while the computational complexity of the pseudo-inverse-based method scales cubically with the same number of demodulated symbols.