name: TPMI
full_form: Transmitted Precoding Matrix Indicator
context: Transmitted Matrix Precoding Indicator (TPMI) is the basis of codebook based transmission enabling multi-port antenna transmission. TPMI method is identified as applicable method to enhance EIRP measurement, which is able to activate dual polarization transmission in EIRP measurement. The applicability of this method is defined in Clause 5.2.2.2. For FR2 UEs support the TPMI method, the precoding matrix is given by Table 5.2.2.1-1 (same as Table 6.3.1.5-1 in TS 38.211 [4]). 2Tx TPMI index 2-5 can force UE single-layer transmission using two antenna ports. Among them, only TPMI index 2 is selected for EIRP measurement. Table 5.2.2.1-1: Precoding matrix for single-layer transmission using two antenna ports. The permitted test methods (i.e. DFF, IFF and NFTF) in [3] are all applicable for TPMI method with the additional procedure that the UE should be configured with TPMI index and working at single-layer transmission using two antenna ports, before performing EIRP-based test procedures
description: The Transmitted Precoding Matrix Indicator (TPMI) is a parameter used in codebook-based transmission to enable multi-port antenna transmission. It is an indicator that identifies the precoding matrix for single-layer transmission using two antenna ports.
explanation: The context explicitly mentions TPMI as an indicator that influences the precoding matrix, which is crucial for transmission settings. This indicates that TPMI is a parameter controlling network attributes, fitting the 'Parameter' category.
section_title: 5.2.2.1TPMI method
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