Patent ID: 8750090
Filing Date: 2014-06-10
Classification: H04B,H04J,H04L,H04W

Abstract:
1. A communication apparatus comprising: a receiver configured to receive a signal including a reference signal; and an estimator configured to estimate a channel estimation value using the reference signal 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 regarding a cyclic shift used for the reference signal, the first correspondence relationship defines an orthogonal relationship between a first coefficient corresponding to a first number for specifying the cyclic shift and a second coefficient corresponding to a second number having a determined difference from the first number for specifying the cyclic shift, and the second correspondence relationship defines a non-orthogonal relationship between the first coefficient corresponding to a third number for specifying the cyclic shift and the second coefficient corresponding to a fourth number having said determined difference from the third number for specifying the cyclic shift.