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EP0923199A2
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CDMA Interference canceller
Assignee: Fujitsu Ltd
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Filing: 1998-12-01
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Granted: —
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Expires: 2018-12-01
Abstract
Abstract An interference canceller includes despread processing parts, a combiner combining interference replica generation signals, a decision part that decides an output signal, spread processing parts coupled to the despread processing parts and the decision part, an attenuation coefficient generator generating an attenuation coefficient dependent on a reliability of the interference replica generation signals, and a multiplier multiplying the output signal of the decision part by the attenuation coefficient.
Inventors
- 👤 Hiroyuki Seki
- 👤 Yoshinori Tanaka
- 👤 Shuji Kobayakawa
- 👤 Takeshi Toda
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 19:56
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/69; H04B1/707; H04B1/7097; H04B1/7103; H04B1/7107; H04B1/71075; H04B2001/71077
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
68 words
An interference canceller
comprising: despread processing parts; a combiner combining interference
replica generation signals; a decision part that decides an output
signal; spread processing parts coupled to the
despread processing parts and the decision part; an attenuation coefficient generator
generating an attenuation coefficient dependent on
a reliability of the interference replica
generation signals; and a multiplier multiplying the output
signal of the decision part by the attenuation
coefficient.
Claim 2
Dependent Claim
34 words
The interference canceller as
claimed in claim 1, wherein the attenuation
coefficient generator generates the attenuation
coefficient which has a value dependent on a
position of said interference canceller in a
multi stage formation.
Claim 3
Dependent Claim
41 words
The interference canceller as
claimed in claim 1, wherein the attenuation
coefficient generator generates the attenuation
coefficient which has a value dependent on a delay
of time of a path through which a signal applied
to the interference canceller is propagated.
Claim 4
Dependent Claim
28 words
The interference canceller as
claimed in claim 1, wherein the attenuation
coefficient generator generates the attenuation
coefficient which has a value dependent on a
number of channels multiplexed.
Claim 5
Dependent Claim
33 words
The interference canceller as
claimed in claim 1, wherein the attenuation
coefficient generator generates the attenuation
coefficient which has a value dependent on a level
of a signal applied to the interference canceller.
Claim 6
Dependent Claim
33 words
The interference canceller as
claimed in claim 1, wherein the attenuation
coefficient generator generates the attenuation
coefficient which has a value dependent on a level
of a signal received through an antenna branch.
Claim 7
Dependent Claim
38 words
The interference canceller as
claimed in claim 1, wherein the attenuation
coefficient generator generates the attenuation
coefficient which has a value dependent on a level
of a signal propagated through a path and applied
to the interference canceller.
Claim 8
Dependent Claim
31 words
The interference canceller as
claimed in claim 1, wherein the attenuation
coefficient generator generates the attenuation
coefficient which has a value dependent on a ratio
of signal power to interference/noise power.
Claim 9
Dependent Claim
34 words
The interference canceller as
claimed in claim 1, wherein the attenuation
coefficient generator generates the attenuation
coefficient which has a value dependent on at
least two factors indicating a state of receiving
a signal.
Claim 10
Dependent Claim
35 words
The interference canceller as
claimed in claim 1, wherein the attenuation
coefficient generator generates the attenuation
coefficient which has a value which is increased
as the reliability of the interference replica
generation signal is improved.
Claim 11
Dependent Claim
43 words
The interference canceller as
claimed in claim 1, wherein: the interference canceller includes a
plurality of stages; and each of the stages includes the despread
processing parts, the combiner, the decision part.
the spread processing parts, the attenuation
coefficient generator and the multiplier.
References Cited (Backward Citations)
No citation records indexed.
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