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US09276727B2 Method for allocating physical hybrid automatic repeat request indicator channel 有权
分配物理混合自动重发请求指示符通道的方法

Method for allocating physical hybrid automatic repeat request indicator channel
Abstract:
A method for transmitting acknowledgement/negative acknowledgement (ACK/NACK) signals by an apparatus in a wireless communication system is discussed. The method includes spreading ACK/NACKs using spreading codes of a spreading factor, the spreading factor being one of a spreading factor 2 and a spreading factor 4; and transmitting each of the one or more physical hybrid ARQ indicator channel (PHICH) groups through a plurality of units of four resource elements, each PHICH group carrying one or more spread ACK/NACKs, wherein the number of PHICH groups for she spreading factor 2 is determined as twice of the number of PHICH groups for the spreading factor 4.
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