Title:
ブロック位相推定のための装置および方法
Document Type and Number:
Japanese Patent JP3859174
Kind Code:
B2
Abstract:
A block phase estimator include a phase averaging circuit. A first embodiment of the phase averaging circuit includes a phase differencing circuit coupled to an averager input, a first modulo circuit coupled to the phase differencing circuit, a filter coupled to the first modulo circuit, and a summation circuit having an positive input and a negative input, the positive input being coupled to the averager input, the negative input being coupled to the filter. The phase averaging circuit further includes a second modulo circuit coupled to the summation circuit. An alternative embodiment of the phase averaging circuit includes a delay line having a plurality of taps coupled to an averager input and a plurality of first subtractor circuits, a first input of each first subtractor circuit being coupled to the averager input, a second input of each first subtractor circuit being coupled to a corresponding tap of the plurality of taps. A plurality of first modulo circuits are coupled to the plurality of first subtractor circuits, each first modulo circuit being coupled to a corresponding first subtractor circuit. A summation circuit is coupled to all first modulo circuits, and a scaling circuit is coupled to the summation circuit. The phase averaging circuit further includes a second subtractor circuit, a first input of the second subtractor circuit being coupled to the averager input, a second input of the second subtractor circuit being coupled to the scaling circuit.
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Inventors:
Le Montreuil
Application Number:
JP52467898A
Publication Date:
December 20, 2006
Filing Date:
November 10, 1997
Export Citation:
Assignee:
Scientific-Atlanta, Incorporated
International Classes:
H03D3/00; H04L27/227; G01R25/00; H04L27/233; H04L27/38; H04L27/00
Domestic Patent References:
| JP8149173A | ||||
| JP537380A | ||||
| JP8228208A | ||||
| JP5651646B2 | ||||
| JP10200590A | ||||
| JP3390272B2 | ||||
| JP380842A | ||||
| JP2704414B2 | ||||
| JP26781A | ||||
| JP1260382A | ||||
| JP6125527A | ||||
| JP3103014B2 | ||||
| JP3151944A | ||||
| JP4277956A | ||||
| JP3559377B2 | ||||
| JP9116578A | ||||
| JP3803705B2 | ||||
| JP7183925A |
Foreign References:
| EP1012966B1 |
Attorney, Agent or Firm:
Hidesaku Yamamoto
Takaaki Yasumura
Natsuki Morishita
Takaaki Yasumura
Natsuki Morishita