US5719899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple access digital transmission system and a radio base station and a receiver for use in such a system
Assignee: US Philips Corp
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Filing: 1995-02-23
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Granted: 1998-02-17
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Expires: 2015-02-23
Abstract
Abstract A multiple access digital transmission system including a transmitter for transmitting at least one modulated data stream, and at least one receiver for receiving, via a multipath transmission channel, a transmitted signal which includes the modulated data streams. The receiver includes a resolver for resolving at least one path for at least one multipath received modulated data stream and a channel estimator for estimating channel path delays in the received modulated data streams. The receiver includes a generator for generating an interference reduced signal from the received signal, the interference reduced signal being fed to the channel estimator.
Inventors
- 👤 Jorn Thielecke
- 👤 Wolfgang Granzow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:43
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/69; H04B1/707; H04B1/7097; H04B1/7103; H04B1/7107; H04B1/71072; H04B1/711
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
114 words
A multiple access digital transmission system comprising at least one transmitter for transmitting at least one modulated data stream, and at lest one receiver for receiving a transmitted signal, which comprises the modulated data streams, via a multipath transmission channel, the receiver comprising receiving means having resolving means for resolving at least one path for at least one multipath received modulated data stream, and having channel estimation means, which are coupled to the resolving means, for estimating channel path delays in the received modulated data streams, wherein the receiving means comprises generating means for generating an interference reduced signal from the received signal, the interference reduced signal being fed to the channel estimation means.
Claim 2
Dependent Claim
114 words
A multiple access digital transmission system comprising at least one transmitter for transmitting at least one modulated data stream, and at lest one receiver for receiving a transmitted signal, which comprises the modulated data streams, via a multipath transmission channel, the receiver comprising receiving means having resolving means for resolving at least one path for at least one multipath received modulated data stream, and having channel estimation means, which are coupled to the resolving means, for estimating channel path delays in the received modulated data streams, wherein the receiving means comprises generating means for generating an interference reduced signal from the received signal, the interference reduced signal being fed to the channel estimation means.
Claim 3
Dependent Claim
54 words
A multiple access digital transmission system according to claim 1, wherein the receiving means comprises received signal estimation means for estimating the received signal, and subtraction means for subtracting the estimated signal from the received signal so as to form the interference reduced signal, generation of the interference reduced signal being channel model based.
Claim 4
Dependent Claim
34 words
A multiple access digital transmission system according to claim 2, wherein an amplitude and a phase per resolved path is estimated, the estimated amplitudes and phases being fed to the received signal estimation means.
Claim 5
Dependent Claim
19 words
A multiple access digital transmission system according to claim 3, wherein the amplitude and the phase is recursively estimated.
Claim 6
Dependent Claim
21 words
A multiple access digital transmission system according to claim 2, wherein the received signal estimation means is an adaptive linear combiner.
Claim 7
Dependent Claim
18 words
A multiple access digital transmission system according to claim 1, wherein the resolving means is a RAKE demodulator.
Claim 8
Dependent Claim
19 words
A multiple access digital transmission system according to claim 1, wherein the resolving means is a joint multiuser detector.
Claim 9
Dependent Claim
54 words
A multiple access digital transmission system according to any one of the preceding claims, wherein at least two receiving means are cascaded, an input of a succeeding receiving means being coupled to an interference reduced signal output of a preceding receiving means, so as to successively detect stronger and weaker received modulated data stream.
Claim 10
Dependent Claim
33 words
A multiple access digital transmission system according to claim 1, wherein at transmission side, after spreading, an inverse Fourier transform is applied, and a reception side, before despreading, a Fourier transform is applied.
Claim 11
Dependent Claim
110 words
A radio base station for use in a multiple access digital transmission system, the radio base station comprising a receiver for receiving a signal, which comprises modulated data streams, transmitted via a multipath transmission channel, the receiver comprising receiving means having resolving means for resolving at least one path for at least one multipath received modulated data stream, and having first channel estimation means, which are coupled to the resolving means, for estimating channel path delays in the received modulated data streams, wherein the receiving means comprises generating means for generating an interference reduced signal from the received signal the interference reduced signal being fed to the channel estimation means.
Claim 12
Dependent Claim
110 words
A radio base station for use in a multiple access digital transmission system, the radio base station comprising a receiver for receiving a signal, which comprises modulated data streams, transmitted via a multipath transmission channel, the receiver comprising receiving means having resolving means for resolving at least one path for at least one multipath received modulated data stream, and having first channel estimation means, which are coupled to the resolving means, for estimating channel path delays in the received modulated data streams, wherein the receiving means comprises generating means for generating an interference reduced signal from the received signal the interference reduced signal being fed to the channel estimation means.
Claim 13
Dependent Claim
104 words
A receiver for use in a multiple access digital transmission system, the receiver comprising receiving means for receiving a signal, which comprises modulated data streams, transmitted via a multipath transmission channel, the receiving means having resolving means for resolving at least one path for at least one multipath received modulated data stream, and having first channel estimation means, which are coupled to the resolving means, for estimating channel path delays in the received modulated data streams, wherein the receiving means comprises generating means for generating an interference reduced signal from the received signal, the interference reduced signal being fed to the channel estimation means.
Claim 14
Dependent Claim
104 words
A receiver for use in a multiple access digital transmission system, the receiver comprising receiving means for receiving a signal, which comprises modulated data streams, transmitted via a multipath transmission channel, the receiving means having resolving means for resolving at least one path for at least one multipath received modulated data stream, and having first channel estimation means, which are coupled to the resolving means, for estimating channel path delays in the received modulated data streams, wherein the receiving means comprises generating means for generating an interference reduced signal from the received signal, the interference reduced signal being fed to the channel estimation means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-02-16 | 2001-08-18 | 2002-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-02-16 | 2005-08-18 | 2006-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-02-16 | 2009-08-18 | 2010-02-17 | $7700.00 | Window Closed / Lapsed |