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Waveforms of 4G and 5G Radiofrequency Signals: Are Differences Relevant to Biology or Health?

Health Physics · 2024 · No effect · Insufficient evidence

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No effectInsufficient evidencePaper 269

This note reviews similarities and differences between 4G LTE and 5G NR baseband waveforms and concludes that modulation differences are unlikely to have biological relevance. It notes that 5G NR enables access to a greater range of frequencies and suggests f…

Study snapshot

PublicationHealth Physics · 2024
Study typereview
Reported directionNo effect
Evidence ratingInsufficient

Abstract

Waveforms of 4G and 5G Radiofrequency Signals: Are Differences Relevant to Biology or Health? My note: Studies of 4G and 5G exposure have found adverse effects as well as exposure to millimeter waves. Foster KR, Maxson D, Zollman PM. Waveforms of 4G and 5G Radiofrequency Signals: Are Differences Relevant to Biology or Health?. Health Physics. November 20, 2024. doi: 10.1097/HP.0000000000001895. Abstract This Note briefly reviews, at a level that is intended to be accessible to non-specialists, the similarities and differences between waveforms of 4G Long-Term Evolution (4G LTE) and 5G New Radio (5G NR) transmitted by cellular base stations, as a resource for health physicists and others who are engaged in public communication about cellular telephone technologies. Despite the difference in levels of controversy presently existing between 4G LTE (introduced in 2008) and 5G NR (introduced in 2019), the differences in waveform as represented by the baseband waveform are minimal, although 5G NR offers system designers a much wider choice of parameters. Transmitted radiofrequency signals in both technologies appear noise-like, in a frequency range that is narrowly contained in the assigned channel. It is concluded that the modulation differences between 4G LTE and 5G NR are unlikely to have any biological relevance, but the greater range of accessible frequencies in 5G NR suggests the need for further health research, particularly in the 5G FR2 millimeter-wave band. Conclusion In closing, it is noted that the topic of 5G NR and health extends beyond the technical considerations concerning modulation, waveform, and frequency, to include population exposure assessment, risk perception and risk communication, and other topics. One factor contributing to public concerns about 5G NR cell sites is the use of small wireless facilities (“small cells”) along city streets, sometimes close to residences (network operators have deployed 4G LTE and 5G NR small cells in some localities). To address this broader range of issues, in 2022, the European Union funded a large set of studies called CLUE-H that combines efforts of “more than 70 European research organizations in four research consortia” (emf-health-cluster.eu) to study the risks and perceived risks of 5G technology. As communications technology continues to develop, the authors hope that high-quality targeted research will resolve the remaining gaps in our knowledge. journals.lww.com physics/abstract/9900/waveforms_of_4g_and_5g_radiofrequency_signals__are.200.aspx

Machine Enhanced Logic

AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typereview
Effect directionno_effect
PopulationNot supplied
Sample sizeNot supplied
ExposureRF
Evidence strengthInsufficientConfidence: 74% · Peer reviewed: yes

Main findings

This note reviews similarities and differences between 4G LTE and 5G NR baseband waveforms and concludes that modulation differences are unlikely to have biological relevance. It notes that 5G NR enables access to a greater range of frequencies and suggests further health research, particularly in the 5G FR2 millimeter-wave band.

Outcomes measured

  • Biological relevance of modulation/waveform differences (4G LTE vs 5G NR)
  • Health research needs related to 5G frequency ranges, including FR2 millimeter-wave band
  • Population exposure assessment (mentioned)
  • Risk perception and risk communication (mentioned)

Limitations

  • Brief note intended for non-specialists; limited scope
  • Does not present new experimental or epidemiologic data in the abstract
  • Calls for further research, particularly for 5G FR2 millimeter-wave frequencies
View raw extracted JSON
{
  "study_type": "review",
  "exposure": {
    "band": "RF",
    "source": "base station",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": null,
  "sample_size": null,
  "outcomes": [
    "Biological relevance of modulation/waveform differences (4G LTE vs 5G NR)",
    "Health research needs related to 5G frequency ranges, including FR2 millimeter-wave band",
    "Population exposure assessment (mentioned)",
    "Risk perception and risk communication (mentioned)"
  ],
  "main_findings": "This note reviews similarities and differences between 4G LTE and 5G NR baseband waveforms and concludes that modulation differences are unlikely to have biological relevance. It notes that 5G NR enables access to a greater range of frequencies and suggests further health research, particularly in the 5G FR2 millimeter-wave band.",
  "effect_direction": "no_effect",
  "limitations": [
    "Brief note intended for non-specialists; limited scope",
    "Does not present new experimental or epidemiologic data in the abstract",
    "Calls for further research, particularly for 5G FR2 millimeter-wave frequencies"
  ],
  "evidence_strength": "insufficient",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "4G LTE",
    "5G NR",
    "waveform",
    "modulation",
    "baseband waveform",
    "cellular base stations",
    "small cells",
    "millimeter waves",
    "FR2",
    "exposure assessment",
    "risk perception",
    "risk communication",
    "CLUE-H"
  ],
  "suggested_hubs": [
    {
      "slug": "5g-policy",
      "weight": 0.78,
      "reason": "Focuses on 5G NR technical characteristics and implications for health research and public communication, including small cells and risk communication."
    }
  ]
}
AI can be wrong. Always verify against the paper.

AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.

Identifiers and source

DOI: 10.1097/hp.0000000000001895
PubMed: Not supplied

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