name: PHICH
full_form: Physical Hybrid ARQ Indicator Channel
context: For the parameters specified in Table 8.5.2-1 the average probability of a miss-detecting ACK for NACK (Pm-an) shall be below the specified value in Table 8.5.2.2.2-1. The downlink physical setup is in accordance with Annex C.3.2. Table 8.5.2.2.2-1: Minimum performance PHICH
description: The Physical Hybrid ARQ Indicator Channel (PHICH) is a downlink channel used in the Long Term Evolution (LTE) and LTE-Advanced networks to carry Hybrid Automatic Repeat Request (HARQ) acknowledgements/negative acknowledgements (ACK/NACK). It plays a crucial role in ensuring reliable data transmission by providing feedback on the success or failure of packet transmissions. The performance of PHICH is critical for maintaining efficient communication, especially under varying channel conditions.
explanation: PHICH is classified as a Channel because it refers to a specific path used for transmitting HARQ acknowledgements/negative acknowledgements in LTE and LTE-Advanced networks, directly impacting the reliability and efficiency of data transmission.
section_title: 8.5.2.2.2 Minimum Requirement 4 Tx Antenna Port
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