Patent ID: 9049062
Filing Date: 2015-06-02
Classification: H04B,H04J,H04L,H04W

Abstract:
1. A communication apparatus comprising: a receiver configured to receive a reference signal, which is generated at a terminal apparatus using an index related to a cyclic shift and a pair of coefficients in accordance with a switching signal, wherein the switching signal switches between a first correspondence relationship and a second correspondence relationship, each defining a relationship between the index related to a cyclic shift and the pair of coefficients, the first correspondence relationship defines a first pair of coefficients corresponding to an even number index related to a cyclic shift and a second pair of coefficients corresponding to an odd number index related to a cyclic shift and the second correspondence relationship defines the first pair of coefficients corresponding to the odd number index related to a cyclic shift and the second pair of coefficients corresponding to the even number index related to a cyclic shift; and an estimator configured to estimate a channel estimation value using the reference signal.