Pulse or digital communications – Receivers – Interference or noise reduction
Reexamination Certificate
2005-07-26
2005-07-26
Ghebretinsae, Temesghen (Department: 2637)
Pulse or digital communications
Receivers
Interference or noise reduction
C375S267000, C455S134000
Reexamination Certificate
active
06922453
ABSTRACT:
A diversity receiver carries out error detection, error correction, and data detection on each detected data string21.An output switching unit17outputs a decoded data string24of a branch selected by a branch selector16.The branch selector16selects a branch of highest priority in priority information29from branches of which a data detection signal25indicates that the data is valid and of which the number of error symbols22coincides with a minimum value. In the priority information29,higher priority is assigned to a branch that includes an antenna of which the coverage is closer to that of an antenna included in a branch selected at the immediately-previous time. Thus, selected from the plurality of branches having the minimum number of error symbols22is the one that includes the antenna of which the coverage is closest to the coverage of the antenna included in the branch selected at the immediately-previous time. Therefore, it is possible to suppress the occurrence of misselection of a poor-quality branch, and improve a reception characteristic.
REFERENCES:
patent: 5455844 (1995-10-01), Ishikawa et al.
patent: 6181749 (2001-01-01), Urabe et al.
patent: 6512738 (2003-01-01), Namekata et al.
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patent: 2000-4192 (2000-01-01), None
Miyanaga Kenji
Mori Ken-ichi
Takai Hitoshi
Urabe Yoshio
Yamasaki Hidetoshi
Ghebretinsae Temesghen
Matsushita Electric - Industrial Co., Ltd.
Wenderoth , Lind & Ponack, L.L.P.
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