US 7,117,016 B2 · Adaptive antenna base station apparatus

Abstract

An adaptive antenna base station apparatus comprises an array antenna including N (N being a natural number) antenna elements; N reception sections for respectively performing orthogonal detection of high-frequency signals, respectively received by the antenna elements, after frequency conversion; N×M despreading sections for performing despreading operations, corresponding to delay times of M (M being a natural number) path components included in output signals of the reception sections; M correlation computing sections for performing correlations among the antenna elements for each path; a correlation combining section for combining output signals of the correlation computing sections; and a DOA estimating section for estimating a direction of arrival (DOA) by using an output of the correlation combining section. This can ensure collective estimation of DOAs of M path components, thereby reducing the amount of computation of estimating the DOAs for plural paths and the cost for the apparatus.

Claims17

Dependent claims

An adaptive antenna base station apparatus comprising:

an array antenna including N (N being a natural number) antenna elements;
N reception sections for respectively performing orthogonal detection of code-multiplexed high-frequency signals, respectively received by said antenna elements of said array antenna, after frequency conversion of said code-multiplexed high-frequency signals;
N×M despreading sections for performing despreading operations, corresponding to delay times of M (M being a natural number) path components included in output signals of said reception sections, with respect to said output signals of said reception sections;
M correlation computing sections for performing correlations among said antenna elements on output signals of said despreading sections for each path;
a correlation combining section for combining output signals of said correlation computing sections;
and
a direction-of-arrival estimating section for estimating a direction of arrival by using an output of said correlation combining section.

4 more elements

An adaptive antenna base station apparatus comprising:

an array antenna including N (N being a natural number) antenna elements;
Nu×N reception sections for respectively performing orthogonal detection of code-multiplexed high-frequency signals, respectively received by said antenna elements of said array antenna, after frequency conversion of said code-multiplexed high-frequency signals in association with Nx (Nu being a natural number) pieces of user-by-user information included in a received wave;
Nu×N×M despreading sections for performing despreading operations, corresponding to delay times of M (M being a natural number) path components included in output signals of said reception sections, with respect to said output signals of said reception sections;
Nu×M correlation computing sections for performing correlations among said antenna elements on output signals of said despreading sections for each path;
Nu correlation combining sections for combining output signals of said correlation computing sections;
an interuser correlation combining section for combining Nu output signals of said correlation combining sections;
Uu other-user correlation subtracting sections for computing correlation components of (Nu−1) other users by subtracting an output of that correlation combining section which is associated with a target user from an output of said interuser correlation combining section;
and
Nu direction-of-arrival estimating sections for estimating a direction of arrival of said target user by using outputs of said other-user correlation subtracting sections.

6 more elements

Dependencies are inferred from the claim text.

Adaptive antenna base station apparatus

Life of this patent

Adaptive antenna base station apparatus

Life of this patent

Abstract

Claims17