FIELD: wireless communication.
SUBSTANCE: invention relates to means of wireless communication. The device includes: a scrambling unit (214), which multiplies the modulated response signal by the scrambling code "1" or "-1" to invert the aggregate for each of the response signals on the cyclic shift axis; an expansion unit (215), which performs primary expansion over the spectrum of the response signal using the ZAC sequence set by the control unit (209); and the expansion unit (218), which performs a secondary expansion over the spectrum of the response signal after it is subjected to primary expansion, using the block expansion code sequence set by the control unit (209).
EFFECT: improving the characteristic of the error rate of the NACK signal.
16 cl, 15 dwg
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Authors
Dates
2021-07-07—Published
2018-03-13—Filed