发明名称 |
Receiver apparatus, reception method, communication system, and communication method |
摘要 |
A receiver apparatus includes a first frequency response estimator configured to calculate a first frequency response estimation value using a reference signal, a duration extractor configured to determine an estimation duration by extracting at least one duration from among a plurality of duration candidates into which a predetermined maximum delay time is divided, and a second frequency response estimator configured to calculate a second frequency response estimation value as a frequency response estimation value for demodulation using the first frequency response and the estimation duration. The receiver apparatus thus performs high-precision channel estimation even if a variety of PDPs occur with time. |
申请公布号 |
US8983007(B2) |
申请公布日期 |
2015.03.17 |
申请号 |
US201214353048 |
申请日期 |
2012.10.22 |
申请人 |
Sharp Kabushiki Kaisha |
发明人 |
Kato Katsuya;Yoshimoto Takashi;Yamada Ryota;Toh Shinpei;Yokomakura Kozue |
分类号 |
H04L27/06;H04L27/26;H04L25/02 |
主分类号 |
H04L27/06 |
代理机构 |
Keating & Bennett, LLP |
代理人 |
Keating & Bennett, LLP |
主权项 |
1. A receiver apparatus comprising:
a first frequency response estimator configured to calculate a first frequency response estimation value using a reference signal; a duration extractor configured to determine an estimation duration by extracting at least one duration from among a plurality of duration candidates into which a predetermined maximum delay time is divided; and a second frequency response estimator configured to calculate a second frequency response estimation value as a frequency response estimation value for demodulation using the first frequency response and the estimation duration, wherein the duration extractor comprises: an approximate channel impulse response estimating unit configured to calculate an approximate channel impulse response by frequency-time transforming the first frequency response estimation value; a path extraction unit configured to extract a predetermined number of paths from paths forming the approximate channel impulse response; and a corresponding duration determining unit configured to determine as the estimation duration a duration of the path extracted from the duration candidates including the delay time; and a test frequency response estimating unit configured to calculate a plurality of test frequency response estimation values using the first frequency response and each estimation duration output by the corresponding duration determining unit; a channel match value calculation unit configured to calculate a channel match value of each of the test frequency response estimation values using the first frequency response; and a comparator configured to select an estimation duration to be used by the second frequency response estimator in accordance with the channel match value. |
地址 |
Osaka JP |