Title:
【発明の名称】ディジタルラジオ受信機及びこれに組み合わされる高速更新適応チャンネル等化フィルタ
Document Type and Number:
Japanese Patent JP2877722
Kind Code:
B2
Abstract:
In response to a received carrier wave modulated in accordance with a digital signal, a digital radio receiver recovers in digital form a modulating signal that is at times subject to undesirable amounts of multipath distortion. This recovered modulating signal is applied as respective input signals to first and second finite-impulse-response (FIR) filters, each of an N-tap type, the taps of which are adaptively weighted. The first FIR filter responds to the modulating signal to supply an output signal in which multipath distortion is suppressed. The second FIR filter responds to the modulating signal to generate corrections for the tap weights of the first FIR filter, which corrections are generated more rapidly than can be done with a microprocessor of the type commonly known as a "digital signal processor" or "DSP". A digital comparator compares samples of the first FIR filter response to corresponding samples of an ideal response, thereby to generate updated tap weights for the second FIR filter.
Inventors:
JIAN YAN
CHANDORAKANTO BUHAIRARUBUHAI PATERU
TEIANMIN RIU
AREN RUROI RINBAAGU
CHANDORAKANTO BUHAIRARUBUHAI PATERU
TEIANMIN RIU
AREN RUROI RINBAAGU
Application Number:
JP6431395A
Publication Date:
March 31, 1999
Filing Date:
March 23, 1995
Export Citation:
Assignee:
SANSEI DENSHI KK
International Classes:
H03H15/00; H03H17/00; H03H21/00; H04B3/04; H04B7/005; H04L7/02; H04L25/03; H04N5/21; H04N7/015; H04N7/08; H04N7/081; H04L7/08; (IPC1-7): H04B7/005; H03H21/00; H04N5/21; H04N7/015; H04N7/08; H04N7/081
Domestic Patent References:
| JP4817242A | ||||
| JP362628A |
Attorney, Agent or Firm:
Tadahiko Ito (1 outside)