name: CQI
full_form: Channel Quality Indicator
context: For the parameters specified in Table 9.3.1.1.1-1, and using the downlink physical channels specified in Annex C.3.2, the minimum requirements are specified in Table 9.3.1.1.1-2 and by the following a) a sub-band differential CQI offset level of 0 shall be reported at least ï¡ % of the time but less than ï¢ï % for each sub-band; b) the ratio of the throughput obtained when transmitting on a randomly selected sub-band among the sub-bands with the highest differential CQI offset level the corresponding TBS and that obtained when transmitting the TBS indicated by the reported wideband CQI median on a randomly selected sub-band in set S shall be â¥ ï§; c) when transmitting on a randomly selected sub-band among the sub-bands with the highest differential CQI offset level the corresponding TBS, the average BLER for the indicated transport formats shall be greater or equal to 0.05. The requirements only apply for sub-bands of full size and the random scheduling across the sub-bands is done by selecting a new sub-band in each TTI for FDD, each available downlink transmission instance for TDD. Table 9.3.1.1.1-1 Sub-band test for single antenna transmission (FDD) Table 9.3.1.1.1-2 Minimum requirement (FDD)
description: The Channel Quality Indicator (CQI) is a measurement used in wireless communication systems to quantify the quality of a communication channel. It provides information about the signal-to-noise ratio and other factors that affect the reliability of data transmission over the channel. In the context provided, CQI is specifically related to the downlink physical channels and is used to determine the minimum requirements for sub-band differential CQI offset levels, throughput ratios, and average block error rates (BLER) in various transmission scenarios.
explanation: CQI is classified as a Measurement because it represents a quantifiable metric that characterizes the quality of a communication channel. The context highlights its use in evaluating performance requirements for sub-band transmissions, emphasizing its role as a key measurement parameter in wireless communication systems.
section_title: 9.3.1.1.1 FDD
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