name: PPM
full_form: Parts Per Million
context: The UE modulated carrier frequency for V2X sidelink transmissions shall be accurate to within Â±0.1 PPM observed over a period of one time slot (0.5 ms) compared to the absolute frequency in case of using GNSS synchronization source. The same requirements applied over a period of one time slot (0.5 ms) compared to the relative frequency in case of using the E-UTRA Node B or V2X UE sidelink synchronization signals. When UE is configured for simultaneous E-UTRA V2X sidelink and E-UTRA uplink transmissions for inter-band E-UTRA V2X / E-UTRA bands specified in Table 5.5G-2, the requirements in subclause 6.5.1G apply for V2X sidelink transmission and the requirements in subclause 6.5.1 apply for the E-UTRA uplink transmission. For V2X UE supporting Transmit Diversity, if the UE transmits on two antenna connectors at the same time, the UE modulated carrier frequency at each transmit antenna connector shall be accurate to within Â±0.1 PPM observed over a period of one time slot (0.5 ms) in case of using GNSS synchronization source. The same requirements applied over a period of one time slot (0.5 ms) compared to the relative frequency in case of using the E-UTRA Node B or V2X UE sidelink synchronization signals. If the UE transmits on one antenna connector at a time, the requirements for single carrier shall apply to the active antenna connector.
description: Parts Per Million (PPM) is a unit of measurement used in telecommunications to express the accuracy or tolerance of a frequency. In the context of V2X sidelink transmissions, PPM is utilized to specify the allowed deviation of the UE modulated carrier frequency from the absolute or relative frequency over a specific period, typically one time slot (0.5 ms). This ensures that the transmission remains within acceptable limits for reliable communication.
explanation: PPM is classified as a Measurement because it quantifies the precision of frequency in telecommunications, specifically in V2X sidelink transmissions, adhering to the 3GPP's standards for accurate and reliable data transmission.
section_title: 6.5.1G Frequency error for V2X Communication
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