US5757866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diversity receiver
Assignee: Fujitsu Ltd
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Filing: 1995-11-10
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Granted: 1998-05-26
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Expires: 2015-11-10
Abstract
Abstract A diversity receiver respectively receiving signals in two branches includes two demodulating sections for producing respective amplitude and phases of received signals at a unit of symbol. The receiver includes a memory access section for producing an amplitude ratio of the amplitude of the received signals and a phase difference between the phases of the received signals. The receiver further includes a storage section for storing at least one relative phase difference between a phase of a vector-combined signal combined based on the received signals and one of the phases of the received signals for an address given by the amplitude ratio and the phase difference of the received signals. The phase of the vector-combined signal is previously calculated based on the amplitude ratio, the phase difference, and the one of the phases of the received signals. The receiver further includes an adding section for adding the relative phase difference produced from the storage section being addressed by the amplitude ratio and the phase difference produced from the memory access section to the one of the phases of the received signals to produce the phase of the vector-combined signal combined based on the received signals.
Inventors
- 👤 Hideyuki Kannari
- 👤 Manabu Shibata
- 👤 Hiroki Oikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:05
CPC Classifications
H; H04; H04B; H04B7/00; H04B7/02; H04B7/04; H04B7/08; H04B7/0837; H04B7/0842; H04B7/0865
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
197 words
A diversity receiver respectively receiving signals in at least two branches, the diversity receiver comprising: at least two demodulating means respectively provided for said at least two branches for producing respective amplitude and phases of received signals at a unit of symbol; memory access means for producing an amplitude ratio of said amplitude of the received signals and a phase difference between the phases of the received signals; storage means for storing at least one relative phase difference between a phase of a vector-combined signal combined based on the received signals and one of the phases of the received signals for an address given by said amplitude ratio and said phase difference of the received signals, said phase of the vector-combined signal being previously calculated based on said amplitude ratio, said phase difference, and said one of the phases of the received signals; and adding means for adding said relative phase difference produced from said storage means being addressed by said amplitude ratio and said phase difference produced from the memory access means to said one of the phases of the received signals to produce said phase of the vector-combined signal combined based on the received signals.
Claim 2
Dependent Claim
197 words
A diversity receiver respectively receiving signals in at least two branches, the diversity receiver comprising: at least two demodulating means respectively provided for said at least two branches for producing respective amplitude and phases of received signals at a unit of symbol; memory access means for producing an amplitude ratio of said amplitude of the received signals and a phase difference between the phases of the received signals; storage means for storing at least one relative phase difference between a phase of a vector-combined signal combined based on the received signals and one of the phases of the received signals for an address given by said amplitude ratio and said phase difference of the received signals, said phase of the vector-combined signal being previously calculated based on said amplitude ratio, said phase difference, and said one of the phases of the received signals; and adding means for adding said relative phase difference produced from said storage means being addressed by said amplitude ratio and said phase difference produced from the memory access means to said one of the phases of the received signals to produce said phase of the vector-combined signal combined based on the received signals.
Claim 3
Dependent Claim
184 words
A diversity receiver respectively receiving signals in at least two branches, said diversity receiver comprising: at least two demodulating means respectively provided for said at least two branches for producing respective amplitude and phases of received signals at a unit of symbol; memory access means for producing an amplitude ratio of said amplitude of the received signals and a phase difference between the phases of the received signals; and storage means for storing at least one phase of a vector-combined signal combined based on the received signals for an address given by said amplitude ratio and said phase difference and one of the phases of the received signals, said phase of the vector-combined signal being previously calculated based on said amplitude ratio, said phase difference, and said one of the phases of the received signals; wherein said phase of the vector-combined signal is produced from said storage means by providing to the storage means said amplitude ratio and said phase difference from the memory access means and said one of the phases of the received signals from said demodulating means at the symbol unit.
Claim 4
Dependent Claim
184 words
A diversity receiver respectively receiving signals in at least two branches, said diversity receiver comprising: at least two demodulating means respectively provided for said at least two branches for producing respective amplitude and phases of received signals at a unit of symbol; memory access means for producing an amplitude ratio of said amplitude of the received signals and a phase difference between the phases of the received signals; and storage means for storing at least one phase of a vector-combined signal combined based on the received signals for an address given by said amplitude ratio and said phase difference and one of the phases of the received signals, said phase of the vector-combined signal being previously calculated based on said amplitude ratio, said phase difference, and said one of the phases of the received signals; wherein said phase of the vector-combined signal is produced from said storage means by providing to the storage means said amplitude ratio and said phase difference from the memory access means and said one of the phases of the received signals from said demodulating means at the symbol unit.
Claim 5
Dependent Claim
222 words
A diversity receiver respectively receiving signals in at least two branches, said diversity receiver comprising: at least two demodulating means respectively provided for said at least two branches for producing respective amplitude and phases of received signals at a unit of symbol; memory access means for producing an amplitude ratio of said amplitude of the received signals and a phase difference between the phases of the received signals; phase selecting means for selecting the phase of a larger amplitude one of said received signals; storage means for storing at least one relative phase difference between a phase of a vector-combined signal combined based on the received signals and said phase of the larger amplitude one of the received signals for an address given by said amplitude ratio and said phase difference of said received signals, said phase of the vector-combined signal being previously calculated based on said amplitude ratio and said phase difference of the received signals and said phase of the larger amplitude one of the received signals; and adding means for adding said relative phase difference produced from said storage means being accessed by the amplitude ratio and the phase difference produced from the memory access means to said phase selected in the phase selecting means to produce said phase of the vector-combined signal combined based on the received signals.
Claim 6
Dependent Claim
222 words
A diversity receiver respectively receiving signals in at least two branches, said diversity receiver comprising: at least two demodulating means respectively provided for said at least two branches for producing respective amplitude and phases of received signals at a unit of symbol; memory access means for producing an amplitude ratio of said amplitude of the received signals and a phase difference between the phases of the received signals; phase selecting means for selecting the phase of a larger amplitude one of said received signals; storage means for storing at least one relative phase difference between a phase of a vector-combined signal combined based on the received signals and said phase of the larger amplitude one of the received signals for an address given by said amplitude ratio and said phase difference of said received signals, said phase of the vector-combined signal being previously calculated based on said amplitude ratio and said phase difference of the received signals and said phase of the larger amplitude one of the received signals; and adding means for adding said relative phase difference produced from said storage means being accessed by the amplitude ratio and the phase difference produced from the memory access means to said phase selected in the phase selecting means to produce said phase of the vector-combined signal combined based on the received signals.
Claim 7
Dependent Claim
227 words
A diversity receiver respectively receiving signals in at least two branches, the diversity receiver comprising: at least two demodulating means respectively provided for said at least two branches for producing respective amplitude and phases of received signals at a unit of symbol; memory access means for producing an amplitude ratio of said amplitude of the received signals and a phase difference between the phases of the received signals; phase selecting means for selecting a smaller one of said phases of the received signals; storage means for storing at least one relative phase difference between a phase of a vector-combined signal combined based on the received signals and said smaller one of the phases of the received signals for an address given by said amplitude ratio and said phase difference of the received signals, said phase of the vector-combined signal being previously calculated based on said amplitude ratio and said phase difference of the received signals and said smaller one of the phases of the received signals; and adding means for adding said relative phase difference produced from said storage means being accessed by the amplitude ratio and the phase difference produced from the memory access means to said smaller one of the phases of the received signals selected in the phase selecting means to produce said phase of the vector-combined signal combined based on the received signals.
Claim 8
Dependent Claim
227 words
A diversity receiver respectively receiving signals in at least two branches, the diversity receiver comprising: at least two demodulating means respectively provided for said at least two branches for producing respective amplitude and phases of received signals at a unit of symbol; memory access means for producing an amplitude ratio of said amplitude of the received signals and a phase difference between the phases of the received signals; phase selecting means for selecting a smaller one of said phases of the received signals; storage means for storing at least one relative phase difference between a phase of a vector-combined signal combined based on the received signals and said smaller one of the phases of the received signals for an address given by said amplitude ratio and said phase difference of the received signals, said phase of the vector-combined signal being previously calculated based on said amplitude ratio and said phase difference of the received signals and said smaller one of the phases of the received signals; and adding means for adding said relative phase difference produced from said storage means being accessed by the amplitude ratio and the phase difference produced from the memory access means to said smaller one of the phases of the received signals selected in the phase selecting means to produce said phase of the vector-combined signal combined based on the received signals.
Claim 9
Dependent Claim
209 words
A diversity receiver respectively receiving signals in at least two branches, the diversity receiver comprising: at least two demodulating means respectively provided for said at least two branches for producing respective amplitude and phases of received signals at a unit of symbol; memory access means for producing an amplitude ratio of said amplitude of the received signals and a phase difference between the phases of the received signals; phase selecting means for selecting the phase of a larger amplitude one of said received signals; and storage means for storing at least one phase of a vector-combined signal combined based on the received signals for an address given by said amplitude ratio and said phase difference of the received signals and said phase of the larger amplitude one of the received signals, said phase of the vector-combined signal being previously calculated based on said amplitude ratio and said phase difference of the received signals and said phase of the larger amplitude one of the received signals; wherein said phase of the vector-combined signal is produced from said storage means by providing to the storage means said amplitude ratio and said phase difference from the memory access means and said phase selected in the phase selecting means at the symbol unit.
Claim 10
Dependent Claim
209 words
A diversity receiver respectively receiving signals in at least two branches, the diversity receiver comprising: at least two demodulating means respectively provided for said at least two branches for producing respective amplitude and phases of received signals at a unit of symbol; memory access means for producing an amplitude ratio of said amplitude of the received signals and a phase difference between the phases of the received signals; phase selecting means for selecting the phase of a larger amplitude one of said received signals; and storage means for storing at least one phase of a vector-combined signal combined based on the received signals for an address given by said amplitude ratio and said phase difference of the received signals and said phase of the larger amplitude one of the received signals, said phase of the vector-combined signal being previously calculated based on said amplitude ratio and said phase difference of the received signals and said phase of the larger amplitude one of the received signals; wherein said phase of the vector-combined signal is produced from said storage means by providing to the storage means said amplitude ratio and said phase difference from the memory access means and said phase selected in the phase selecting means at the symbol unit.
Claim 11
Dependent Claim
214 words
A diversity receiver respectively receiving signals in at least two branches, the diversity receiver comprising: at least two demodulating means respectively provided for said at least two branches for producing respective amplitude and phases of received signals at a unit of symbol; memory access means for producing an amplitude ratio of said amplitude of the received signals and a phase difference between the phases of the received signals; phase selecting means for selecting a smaller one of said phases of the received signals; and storage means for storing at least one phase of a vector-combined signal combined based on the received signals for an address given by said amplitude ratio and said phase difference of the received signals and said smaller one of the phases of the received signals, said phase of the vector-combined signal being previously calculated based on said amplitude ratio and said phase difference of the received signals and said smaller one of the phases of the received signals; wherein said phase of the vector-combined signal is produced from said storage means by providing to the storage means said amplitude ratio and said phase difference from the memory access means and said smaller one of the phases of the received signals selected in the phase selecting means at the symbol unit.
Claim 12
Dependent Claim
214 words
A diversity receiver respectively receiving signals in at least two branches, the diversity receiver comprising: at least two demodulating means respectively provided for said at least two branches for producing respective amplitude and phases of received signals at a unit of symbol; memory access means for producing an amplitude ratio of said amplitude of the received signals and a phase difference between the phases of the received signals; phase selecting means for selecting a smaller one of said phases of the received signals; and storage means for storing at least one phase of a vector-combined signal combined based on the received signals for an address given by said amplitude ratio and said phase difference of the received signals and said smaller one of the phases of the received signals, said phase of the vector-combined signal being previously calculated based on said amplitude ratio and said phase difference of the received signals and said smaller one of the phases of the received signals; wherein said phase of the vector-combined signal is produced from said storage means by providing to the storage means said amplitude ratio and said phase difference from the memory access means and said smaller one of the phases of the received signals selected in the phase selecting means at the symbol unit.
Claim 13
Dependent Claim
30 words
The diversity receiver as claimed in claim 1, wherein said vector-combined signal is a signal generated by combining the received signals with squaring the respective amplitude of the received signals.
Claim 14
Dependent Claim
30 words
The diversity receiver as claimed in claim 2, wherein said vector-combined signal is a signal generated by combining the received signals with squaring the respective amplitude of the received signals.
Claim 15
Dependent Claim
30 words
The diversity receiver as claimed in claim 3, wherein said vector-combined signal is a signal generated by combining the received signals with squaring the respective amplitude of the received signals.
Claim 16
Dependent Claim
30 words
The diversity receiver as claimed in claim 4, wherein said vector-combined signal is a signal generated by combining the received signals with squaring the respective amplitude of the received signals.
Claim 17
Dependent Claim
30 words
The diversity receiver as claimed in claim 5, wherein said vector-combined signal is a signal generated by combining the received signals with squaring the respective amplitude of the received signals.
Claim 18
Dependent Claim
30 words
The diversity receiver as claimed in claim 6, wherein said vector-combined signal is a signal generated by combining the received signals with squaring the respective amplitude of the received signals.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-05-25 | 2001-11-24 | 2002-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-05-25 | 2005-11-24 | 2006-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-05-25 | 2009-11-24 | 2010-05-26 | $7700.00 | Window Closed / Lapsed |