Patent US5715282A successfully refreshed from Google Patents.
US5715282A
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Method and apparatus for detecting interference in a receiver for use in a wireless communication system
Assignee: Google Technology Holdings LLC
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Filing: 1996-05-08
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Granted: 1998-02-03
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Expires: 2016-05-08
Abstract
Abstract An apparatus for use in a receiver (100) of a wireless communication system is provided. The apparatus comprises a first filter (340) having a first cutoff frequency, a second filter (350) having a second cutoff frequency, a first data bit estimator (360) coupled to the first filter (340), a second data bit estimator (361) coupled to the second filter (350), a third data bit estimator (363), and decision logic (370) dynamically selecting one of the first and second filters based on a first bit count from the first data bit estimator (360), a second bit count from the second data bit estimator (361), and a third bit count from the third data bit estimator (363).
Inventors
- 👤 Mack Mansouri
- 👤 Richard Bontrager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:32
CPC Classifications
H; H04; H04B; H04B7/00; H04B7/005; H04B1/00; H04B1/06; H04B1/10; H04B1/1027
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
114 words
An interference detection apparatus for use in a receiver of a wireless communication system, the apparatus comprising: a first filter having a first cutoff frequency; a second filter having a second cutoff frequency; a first data bit estimator coupled to the first filter; a second data bit estimator coupled to the second filter; a third data bit estimator; and decision logic responsive to the first, second, and third data bit estimators and dynamically selecting one of the first and second filters based on a first bit count from the first data bit estimator, a second bit count from the second data bit estimator, and a third bit count from the third data bit estimator.
Claim 2
Dependent Claim
114 words
An interference detection apparatus for use in a receiver of a wireless communication system, the apparatus comprising: a first filter having a first cutoff frequency; a second filter having a second cutoff frequency; a first data bit estimator coupled to the first filter; a second data bit estimator coupled to the second filter; a third data bit estimator; and decision logic responsive to the first, second, and third data bit estimators and dynamically selecting one of the first and second filters based on a first bit count from the first data bit estimator, a second bit count from the second data bit estimator, and a third bit count from the third data bit estimator.
Claim 3
Dependent Claim
16 words
The apparatus of claim 1, wherein the first filter comprises an adjacent channel interference reduction filter.
Claim 4
Dependent Claim
14 words
The apparatus of claim 1, wherein the decision logic receives a predetermined data sequence.
Claim 5
Dependent Claim
129 words
A receiver in a wireless communication system, the receiver comprising: an antenna; a frequency downconverter responsive to the antenna; a demodulator responsive to the frequency downconverter; an analog to digital converter responsive to the demodulator; and an interference detection module responsive to the analog to digital converter, the interference detection module comprising: a first digital filter; a second digital filter; a first data bit estimator responsive to the first filter; a second data bit estimator responsive to the second filter; a third data bit estimator; and decision logic selecting one of the first and second filters based on a first bit count from the first data bit estimator, a second bit count from the second data bit estimator, and a third bit count from the third data bit estimator.
Claim 6
Dependent Claim
129 words
A receiver in a wireless communication system, the receiver comprising: an antenna; a frequency downconverter responsive to the antenna; a demodulator responsive to the frequency downconverter; an analog to digital converter responsive to the demodulator; and an interference detection module responsive to the analog to digital converter, the interference detection module comprising: a first digital filter; a second digital filter; a first data bit estimator responsive to the first filter; a second data bit estimator responsive to the second filter; a third data bit estimator; and decision logic selecting one of the first and second filters based on a first bit count from the first data bit estimator, a second bit count from the second data bit estimator, and a third bit count from the third data bit estimator.
Claim 7
Dependent Claim
26 words
The receiver of claim 4, wherein the first digital filter comprises an adjacent channel interference filter and the second digital filter comprises a cochannel interference filter.
Claim 8
Dependent Claim
15 words
The receiver of claim 4, wherein the decision logic receives a predetermined sequence of data.
Claim 9
Dependent Claim
15 words
The receiver of claim 6, wherein the predetermined sequence of data comprises a training sequence.
Claim 10
Independent Claim
134 words
A method of detecting interference comprising the steps of: receiving a signal having a training data sequence; decoding the received signal in a first mode using a first filter to produce a first filtered signal; based on the first filtered signal, determining a first estimated training data sequence; decoding the received signal in a second mode using a second filter to produce a second filtered signal; based on the second filtered signal, determining a second estimated training data sequence; comparing a predetermined training data sequence with the first estimated training data sequence to produce a first bit count; comparing the predetermined training data sequence with the second estimated training data sequence to produce a second bit count; and selecting one of the first and second filters based on the first and second bit counts.
Claim 11
Independent Claim
134 words
A method of detecting interference comprising the steps of: receiving a signal having a training data sequence; decoding the received signal in a first mode using a first filter to produce a first filtered signal; based on the first filtered signal, determining a first estimated training data sequence; decoding the received signal in a second mode using a second filter to produce a second filtered signal; based on the second filtered signal, determining a second estimated training data sequence; comparing a predetermined training data sequence with the first estimated training data sequence to produce a first bit count; comparing the predetermined training data sequence with the second estimated training data sequence to produce a second bit count; and selecting one of the first and second filters based on the first and second bit counts.
Claim 12
Dependent Claim
27 words
The method of claim 8, further comprising the step of comparing the first bit count to a nominal bit count to form a first differential bit count.
Claim 13
Dependent Claim
27 words
The method of claim 9, further comprising the step of comparing the second bit count to the nominal bit count to form a second differential bit count.
Claim 14
Dependent Claim
27 words
The method of claim 10, further comprising the step of selecting one of the first and second filters based on the first and second differential bit counts.
Claim 15
Dependent Claim
26 words
The method of claim 9, wherein the nominal bit count is determined by comparing a nonfiltered estimated training data sequence and the predetermined training data sequence.
Claim 16
Dependent Claim
23 words
The method of claim 8, wherein the received signal is transmitted over a time slot of a time division multiple access communication system.
Claim 17
Dependent Claim
15 words
The method of claim 8, wherein the first filter comprises a cochannel interference reduction filter.
Claim 18
Dependent Claim
16 words
The method of claim 8, wherein the second filter comprises an adjacent channel interference reduction filter.
Claim 19
Dependent Claim
34 words
The method of claim 11, wherein the first filter is selected when the first deferential bit count is greater than zero and the second differential bit count is less than or equal to zero.
Claim 20
Dependent Claim
24 words
The method according to claim 9, wherein one of the first and second estimated training data sequences are produced using a bit estimation device.
References Cited (Backward Citations)
US4761829A
Cited
US5148548A
Cited
US5287556A
Cited
US5499394A
Cited
US5142551A
Cited
US5396657A
Cited
US5339445A
Cited
US5493717A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-02-02 | 2001-08-04 | 2002-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-02-02 | 2005-08-04 | 2006-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-02-02 | 2009-08-04 | 2010-02-03 | $7700.00 | Window Closed / Lapsed |