Title:
ノイズの多い推定値をフィルタリングして推定誤差を低減するための方法および装置
Document Type and Number:
Japanese Patent JP5405117
Kind Code:
B2
Abstract:
Techniques for filtering noisy estimates to reduce estimation errors are described. A sequence of input values (e.g., for an initial channel impulse response estimate (CIRE)) is filtered with an infinite impulse response (IIR) filter having at least one coefficient to obtain a sequence of output values (e.g., for a filtered CIRE). The coefficient(s) are updated based on the sequence of input values with an adaptive filter, a bank of prediction filters, or a normalized variation technique. To update the coefficient(s) with the adaptive filter, a sequence of predicted values is derived based on the sequence of input values. Prediction errors between the sequence of predicted values and the sequence of input values are determined and filtered to obtain filtered prediction errors. The coefficient(s) of the IIR filter are then updated based on the prediction errors and the filtered prediction errors.
Inventors:
Magen, Gokuhan
Subramanya, Pervasana Sun
Alila Gatta-Kantaraji, Vijayaraji
Casturi, Nitin
Subramanya, Pervasana Sun
Alila Gatta-Kantaraji, Vijayaraji
Casturi, Nitin
Application Number:
JP2008541473A
Publication Date:
February 05, 2014
Filing Date:
November 15, 2006
Export Citation:
Assignee:
QUALCOMM INCORPORATED
International Classes:
H03H21/00; H03H17/02; H03H17/04; H04B1/707; H04B1/711
Domestic Patent References:
| JP2004538720A |
Attorney, Agent or Firm:
Kurata Masatoshi
Satoshi Kono
Makoto Nakamura
Yoshihiro Fukuhara
Takashi Mine
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Kocho Chojiro
Naoki Kono
Katsu Sunagawa
Katsumura Hiro
Ryo Hashimoto
Tetsuya Kazama
Shoji Kawai
Tatsushi Sato
Takashi Okada
Mihoko Horiuchi
Takenori Masanori
Takuzo Ichihara
Yamashita Gen
Satoshi Kono
Makoto Nakamura
Yoshihiro Fukuhara
Takashi Mine
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Kocho Chojiro
Naoki Kono
Katsu Sunagawa
Katsumura Hiro
Ryo Hashimoto
Tetsuya Kazama
Shoji Kawai
Tatsushi Sato
Takashi Okada
Mihoko Horiuchi
Takenori Masanori
Takuzo Ichihara
Yamashita Gen