{"id":"bf282aab-13b7-47fd-ace3-af6347314051","arxiv_id":"2505.13966","paper_version":1,"verdict":"CONDITIONAL","confidence":"MODERATE","novelty_score":4.0,"correctness_risk":"medium","formal_verification":"none","parameter_count":4,"one_line_summary":"Zak-OTFS outperforms CP-OFDM in effective spectral efficiency for doubly-spread channels, with the largest gains (more than 2x) in high mobility plus large cell scenarios.","lead":"This paper compares two 5G/6G waveforms in simulations and argues that Zak-OTFS gives higher spectral efficiency than OFDM in channels with high delay spread and high Doppler spread (large cells, fast moving users). It frames the choice as an architecture decision: OFDM prevents inter-carrier interference while Zak-OTFS embraces it and equalizes jointly.","discovery_kind":"extension","skeptic_critique":null,"referee_report":null,"author_rebuttal":null,"desk_editor":null,"rs_alignment":null,"lean_confirmation":null,"pith_extraction":null,"created_at":"2026-08-07T15:43:50.467983+00:00","model_set":{"reader":"deepseek-v4-flash"},"falsifier":null,"supporting_citations":[],"review_version":1}