Receiver and Method for Providing a Phase Coherency for Frequency Hopping Multitone Signals

Simple SummaryContent extracted from patent full text and abstract with AI.

This invention relates to a method and receiver for wireless communication systems that improves phase coherency when receiving frequency hopping multitone signals. The receiver analyzes overlapping subcarriers across sequential frequency hops, linking phase information between them, which allows recovery of phase coherence without requiring complex and precise reference devices. This is especially valuable for applications like radio localization and positioning in wireless networks, such as those used in IoT, smart metering, or mobile communications.

Use CasesContent extracted from patent full text and abstract with AI.

• Precise localization of mobile devices in wireless networks (e.g. smartphones in LTE/5G networks)
• Positioning and tracking IoT devices in smart infrastructures
• Radio localization for industrial telemetry systems
• Smart metering communications that require reliable positioning
• Synchronization of network nodes in wireless communication networks
• Enhanced spatial resolution for wireless sensor networks or Massive Machine Type Communications (mMTC)

BenefitsContent extracted from patent full text and abstract with AI.

• Enables high-accuracy and robust localization by reconstructing phase coherency over wide frequency bands
• Reduces hardware complexity and cost by eliminating the need for highly precise reference oscillators or phase-locked loops (PLLs)
• Improves spectrum utilization and allows adaptive avoidance of interference
• Supports reliable communication in challenging environments with multipath or interference
• Applicable to narrowband systems with wide area coverage, such as NB-IoT and smart metering
• Allows scalable and flexible receiver architectures, suitable for both base stations and end devices

Technical Classifications (CPCs)

Inventors & Applicants

Patent Abstract

The invention concerns a method and a receiver configured to receive a radio signal carrying information, the radio signal comprising an overall frequency band (f 1 to f 6 ) having at least three different sub carriers (f 1 , f 2 , f 3 ). The receiver is further configured to receive, during a first time period (T hop1 ), a first multitone signal (101) carrying a first portion of the radio signal, said first multitone signal comprising a first and a second sub carrier (110 1 , 110 2 ) which are received simultaneously, and to determine a first phase difference (¦ 21 = ¦ 2 - ¦ 1 ) between the first and the second sub carrier (110 1 , 110 2 ). The receiver is further configured to receive, during a second time period (T hop2 ), a second multitone signal (102) carrying a second portion of the radio signal, said second multitone signal (102) comprising the second and a third sub carrier (110 2 , 110 3 ) which are received simultaneously, and to determine a second phase difference (¦ 32 = ¦ 3 - ¦ 2 ) between the second and the third sub carrier (110 2 , 1103). According to the invention, the receiver is configured to determine a phase difference between the first and the third sub carrier (110 1 , 110 3 ) using the first phase difference (¦ 21 = ¦ 2 - ¦ 1 ) and the second phase difference (¦ 32 = ¦ 3 - ¦ 2 ).