PHICH – Physical Hybrid ARQ Indicator Channel
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PHICH – Physical Hybrid ARQ Indicator Channel

The E-UTRA PHICH (Physical Hybrid ARQ Indicator Channel) carries HARQ (Hybrid ARQ) ACK/NAK’s and is transmitted in terms of PHICH groups. A PHICH group consists of up to eight ACK/NACK processes and one PHICH group uses three REG s.

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