Pilot reported receiving a No Takeoff annunciation from the aircraft resulting in a rejected takeoff. Pilot stated they had received several false TCAS advisories during taxi-out. Possible 5G interference was referenced by the pilot as a contributing factor.

Narrative

Possible 5G issue...TCAS. Aborted takeoff due to 'No Take Off' annunciation. Low speed abort; immediately at power application. Exited runway; checked all configuration parameters; nothing was abnormal with configuration. PF/SIC advanced the thrust levers quickly/appropriately. During the initial taxi to the runway we were receiving false TCAS radar advisories almost continuously calling 'traffic.' Holding short of the runway; we received a 'Climb advisory.' As we took the runway; we received multiple advisories of 'Traffic!' 'Traffic!' -- It appeared as though the aircraft was identifying itself as a target. I am not certain; however; I can not help but wonder if this were the reason for the 'No Takeoff' from the aircraft. Further; watching the radar altimeter; it would climb quickly from sea level/0 AGL to 650 feet AGL then back. Thus were we receive radar altimeter issues. Further; this issue may have contributed to an aborted takeoff either directly or indirectly as a distraction; as when cleared to takeoff; the aircraft issued a 'No Takeoff' annunciation at thrust lever application. Further; during this event at BDR; the aircraft annunciating 'Traffic' stepped on tower communications making communications more difficult and interrupted.The second taxi back and takeoff were without issue. The aircraft ceased with the TCAS/RA calls; and there was no further issue with the takeoff; nor with the remainder of the flight or subsequent flights.