FBMC FTN Signaling for Reduced Latency in Wireless Networks

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Solution Overview

Problem

Current wireless communication technologies, such as OFDM, are less suitable for Machine-Type Communication (MTC) due to their less concentrated signal side-lobes, which can lead to increased latency and inefficient use of time resources, particularly in scenarios requiring precise timing like LTE systems.

Innovation Solution

Implementing Filter Bank Multi-Carrier (FBMC) transmission with Faster-Than-Nyquist (FTN) signaling, where signal carrying pulses are transmitted with a separation interval of ρT, where 0<ρ<1, allowing for reduced delay and more efficient use of time resources by precoding and filtering data symbols using GTMH or FTN precoders and decoders.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If OFDM is used for wireless communication, then the signal can be transmitted, but the side-lobes are not concentrated leading to less suitable performance for MTC

Engineering Contradiction:

Improvesignal concentrationVSAvoidside-lobe dispersion

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent changes the fundamental transmission parameters by switching from OFDM to FBMC modulation scheme, which uses different filter bank techniques to achieve more concentrated side-lobes. This parameter change in the modulation approach directly addresses the side-lobe dispersion issue while maintaining transmission capability.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If FBMC is used with traditional Nyquist signaling, then signal concentration is improved, but delay and latency increase reducing time resource efficiency

Engineering Contradiction:

Improvesignal concentrationVSAvoiddelay and latency

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent applies Faster-Than-Nyquist (FTN) signaling which changes the time-domain parameters by transmitting pulses at intervals shorter than the Nyquist rate (separation interval of ρT where 0<ρ<1). This parameter change in the sampling interval allows FBMC to achieve both signal concentration and reduced latency simultaneously.

Inventive Principle:

Principle #35Parameter changes

3Productivity

If pulse separation interval is reduced below Nyquist rate, then time resource efficiency improves, but signal interference may increase

Engineering Contradiction:

Improvetime resource efficiencyVSAvoidsignal quality

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent converts the potential harm of inter-symbol interference (caused by reduced pulse separation) into a benefit by using FBMC's filter bank structure and FTN precoding/decoding techniques. These techniques manage and exploit the controlled interference to achieve higher spectral efficiency while maintaining signal quality through sophisticated signal processing.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Data Source

PatentUS10708105B2Faster-than-Nyquist signaling for FBMC burst transmissions

Publication Date: 2020.07.07 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

AI summary

The present disclosure pertains to a method for operating a transmitting node in a wireless communication network. The method comprises transmitting a signal based on Filter Bank Multi-Carrier, FBMC, filtering, wherein the signal comprises signal carrying pulses, g(t), the pulses having a sampling interval T, the pulses being transmitted with a separation interval of ρT, with 0<ρ<1. The disclosure also pertains to related methods and devices.