US5970085A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and receiver for coded satellite digital audio broadcasting
Assignee: JPMorgan Chase Bank NA
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Filing: 1998-04-17
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Granted: 1999-10-19
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Expires: 2018-04-17
Abstract
Abstract A system and method for broadcasting an audio signal in a turbo-coded satellite digital audio broadcasting system is provided that utilizes the combination of a turbo coding system having code combining and code diversity techniques to lower the power required for transmittal and to transmit at a higher code rate of 1/4 by utilizing the puncturing sequence and a pilot signal assisted orthogonal CDMA; the invention includes an improved receiver system that uses modified RAKE receivers in order to mitigate the Rayleigh multipath fading, shadowing, and temporal blockage and improve performance. The invention further uses a terrestrial gap filler network having a reduced amount of gap fillers.
Inventors
- 👤 Byung Kwan Yi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:00
CPC Classifications
H; H04; H04H; H04H40/00; H04H40/18; H04H40/27; H04H40/90; H03; H03M; H03M13/00; H03M13/29; H03M13/2957; H03M13/37; H03M13/3761; H03M13/63; H03M13/6306; H03M13/635; H03M13/6362; H04B; H04B1/00; H04B1/69; H04B1/707; H04B1/7097; H04B1/711; H04B1/7115; H04B7/00; H04B7/14; H04B7/15; H04B7/185; H04B7/18523; H04H20/00; H04H20/02; H04H20/06; H04H20/65; H04H20/71; H04H20/74; H04J; H04J13/00; H04J13/0007; H04J13/0022; H04L; H04L1/00; H04L1/004; H04L1/0056; H04L1/0064; H04L1/0066; H04L1/0067; H04L1/0068; H04L1/0069; H04B2201/00; H04B2201/69; H04B2201/707; H04B2201/70701; H04H2201/00; H04H2201/10; H04H2201/20; H04L2001/0092; H04L2001/0096; Y; Y02; Y02D; Y02D30/00; Y02D30/70
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
189 words
A digital receiver comprising: receiver circuitry for processing received modulated signals to obtain first and second data streams if contained within currently received signals; a first demultiplexer, coupled to an output of the receiver circuitry, for processing the first data stream if received to recover digital data corresponding to digital source information and a first coded sequence; a second demultiplexer, coupled to an output of the receiver circuitry, for processing the second data stream if received to recover digital data corresponding to interleaved digital source information and a second coded sequence; a code combiner, coupled to the first and second demultiplexers, for processing the first and second code sequences if available, to recover a first turbo encoded sequence corresponding to the digital source information and a second turbo encoded sequence corresponding to the interleaved digital source information; and an intelligent turbo decoder for recovering an accurate representation of the digital source information from an available two or more of: the digital data corresponding to the digital source information, the first turbo encoded sequence, the digital data corresponding to the interleaved digital source information, and the second turbo encoded sequence.
Claim 2
Dependent Claim
189 words
A digital receiver comprising: receiver circuitry for processing received modulated signals to obtain first and second data streams if contained within currently received signals; a first demultiplexer, coupled to an output of the receiver circuitry, for processing the first data stream if received to recover digital data corresponding to digital source information and a first coded sequence; a second demultiplexer, coupled to an output of the receiver circuitry, for processing the second data stream if received to recover digital data corresponding to interleaved digital source information and a second coded sequence; a code combiner, coupled to the first and second demultiplexers, for processing the first and second code sequences if available, to recover a first turbo encoded sequence corresponding to the digital source information and a second turbo encoded sequence corresponding to the interleaved digital source information; and an intelligent turbo decoder for recovering an accurate representation of the digital source information from an available two or more of: the digital data corresponding to the digital source information, the first turbo encoded sequence, the digital data corresponding to the interleaved digital source information, and the second turbo encoded sequence.
Claim 3
Dependent Claim
56 words
A digital receiver as in claim 1, wherein the intelligent turbo decoder processes the digital data corresponding to the digital source information, the first turbo encoded sequence, the digital data corresponding to the interleaved digital source information and the second turbo encoded sequence, if the first and second data streams are contained within currently received signals.
Claim 4
Dependent Claim
50 words
A digital receiver as in claim 1, wherein the intelligent turbo decoder processes the digital data corresponding to the digital source information and portions of the first and second turbo encoded sequences derived from the first coded sequence, if only the first data stream is contained within currently received signals.
Claim 5
Dependent Claim
51 words
A digital receiver as in claim 1, wherein the intelligent turbo decoder processes the digital data corresponding to the interleaved digital source information and portions of the first and second turbo encoded sequences derived from the second coded sequence, if only the second data stream is contained within currently received signals.
Claim 6
Dependent Claim
36 words
A digital receiver as in claim 1, wherein the receiver circuitry comprises first and second RAKE receivers using first and second despreading codes to recover the first and second data streams from received spread spectrum signals.
Claim 7
Dependent Claim
16 words
A digital receiver as in claim 1, wherein the code combiner comprises a code diversity combiner.
Claim 8
Dependent Claim
90 words
A digital receiver as in claim 1, wherein the intelligent turbo decoder comprises: a first decoder coupled to outputs of the code combiner corresponding to the digital source information and the first turbo encoded sequence; a packet combiner combines two independent data streams from an output of the first decoder and an output of the code combiner corresponding to the interleaved digital source information; and a second decoder responsive to an output of the packet combiner and an output of the code combiner corresponding to the second turbo encoded sequence.
Claim 9
Dependent Claim
56 words
A digital receiver as in claim 7, wherein the intelligent turbo decoder further comprises: a interleaver coupling digital output information from the first decoder to an input of the packet combiner; a first deinterleaver providing feedback from the second decoder to the first decoder; and a second deinterleaver for deinterleaving an output from the second decoder.
Claim 10
Dependent Claim
38 words
A digital receiver as in claim 8, further comprising a signal decoder responsive to data output from the second deinterleaver for producing a signal to drive an output device for presenting information to a user of the receiver.
Claim 11
Dependent Claim
21 words
A digital receiver as in claim 9, wherein the signal decoder comprises an audio decoder for generating an analog audio signal.
Claim 12
Dependent Claim
16 words
A digital receiver as in claim 7, wherein the first and second decoders comprise MAP decoders.
Claim 13
Dependent Claim
119 words
A product comprising a machine readable medium bearing sequences of digital code, said sequences digital code comprising: a first multiplexed data stream containing digital source information and a first encoded sequence; and a second multiplexed data stream containing interleaved digital source information and a second encoded sequence, wherein: the first encoded sequence comprises a combination of selected portions of a first turbo code derived from the digital source information and selected portions of a second turbo code derived from the interleaved source information, and the second encoded sequence comprises a combination of alternate portions of the first turbo code derived from the digital source information and alternate portions of a second turbo code derived from the interleaved source information.
Claim 14
Dependent Claim
119 words
A product comprising a machine readable medium bearing sequences of digital code, said sequences digital code comprising: a first multiplexed data stream containing digital source information and a first encoded sequence; and a second multiplexed data stream containing interleaved digital source information and a second encoded sequence, wherein: the first encoded sequence comprises a combination of selected portions of a first turbo code derived from the digital source information and selected portions of a second turbo code derived from the interleaved source information, and the second encoded sequence comprises a combination of alternate portions of the first turbo code derived from the digital source information and alternate portions of a second turbo code derived from the interleaved source information.
Claim 15
Dependent Claim
16 words
A product as in claim 12, wherein the medium comprises at least one modulated electromagnetic wave.
Claim 16
Dependent Claim
212 words
A receiver for receiving and decoding digital data, wherein said digital data comprises: a first multiplexed data stream containing digital source information and a first encoded sequence; and a second multiplexed data stream containing interleaved digital source information and a second encoded sequence, wherein: the first encoded sequence comprises a combination of selected portions of a first turbo code derived from the digital source information and selected portions of a second turbo code derived from the interleaved source information, and the second encoded sequence comprises a combination of alternate portions of the first turbo code derived from the digital source information and alternate portions of a second turbo code derived from the interleaved source information, said receiver comprising: (a) processing circuitry for recovering the first data stream if contained in received broadcast signals and for recovering the second data stream if contained in the received broadcast signals; and (b) an intelligent turbo decoder coupled to the processing circuitry, for decoding the first and second data streams to recover a representation of the digital source information if both data streams are received, and for decoding either the first data stream or the second data stream to recover a representation of the digital source information if only one of the data streams are received.
Claim 17
Dependent Claim
212 words
A receiver for receiving and decoding digital data, wherein said digital data comprises: a first multiplexed data stream containing digital source information and a first encoded sequence; and a second multiplexed data stream containing interleaved digital source information and a second encoded sequence, wherein: the first encoded sequence comprises a combination of selected portions of a first turbo code derived from the digital source information and selected portions of a second turbo code derived from the interleaved source information, and the second encoded sequence comprises a combination of alternate portions of the first turbo code derived from the digital source information and alternate portions of a second turbo code derived from the interleaved source information, said receiver comprising: (a) processing circuitry for recovering the first data stream if contained in received broadcast signals and for recovering the second data stream if contained in the received broadcast signals; and (b) an intelligent turbo decoder coupled to the processing circuitry, for decoding the first and second data streams to recover a representation of the digital source information if both data streams are received, and for decoding either the first data stream or the second data stream to recover a representation of the digital source information if only one of the data streams are received.
Claim 18
Dependent Claim
201 words
A receiver for receiving and decoding digital data, comprising: receiver circuitry for processing received modulated signals from one or both of a first channel and a second channel, to recover digital data corresponding to digital source information and a first coded sequence if the first channel is received, and to recover digital data corresponding to interleaved digital source information and a second coded sequence if the second channel is received; a code combiner, coupled to the receiver circuitry, for processing the first and second code sequences if available, to recover a first turbo encoded sequence corresponding to the digital source information and a second turbo encoded sequence corresponding to the interleaved digital source information; a first decoder, coupled to the code combiner, for processing data corresponding to the digital source information and to the first turbo encoded sequence to produce a first estimation; a packet combiner for forming a ratio as a function of the first estimation and data corresponding to the interleaved digital source information; and a second decoder for producing a second estimation from an output of the packet combiner and an output of the code combiner corresponding to the second turbo encoded sequence and outputting the second estimation.
Claim 19
Dependent Claim
201 words
A receiver for receiving and decoding digital data, comprising: receiver circuitry for processing received modulated signals from one or both of a first channel and a second channel, to recover digital data corresponding to digital source information and a first coded sequence if the first channel is received, and to recover digital data corresponding to interleaved digital source information and a second coded sequence if the second channel is received; a code combiner, coupled to the receiver circuitry, for processing the first and second code sequences if available, to recover a first turbo encoded sequence corresponding to the digital source information and a second turbo encoded sequence corresponding to the interleaved digital source information; a first decoder, coupled to the code combiner, for processing data corresponding to the digital source information and to the first turbo encoded sequence to produce a first estimation; a packet combiner for forming a ratio as a function of the first estimation and data corresponding to the interleaved digital source information; and a second decoder for producing a second estimation from an output of the packet combiner and an output of the code combiner corresponding to the second turbo encoded sequence and outputting the second estimation.
Claim 20
Dependent Claim
45 words
A receiver as in claim 15, further comprising an interleaver, coupled between an output of the first decoder and an input of the packet combiner, for interleaving a data stream representing the first estimation and supplying interleaved data to an input of the packet combiner.
Claim 21
Dependent Claim
54 words
A receiver as in claim 15, further comprising: a deinterleaver, coupled to the output of the second decoder, for deinterleaving data representing the second estimation; and a signal decoder, responsive to data output from the deinterleaver, for producing a signal to drive an output device for presenting information to a user of the receiver.
Claim 22
Dependent Claim
21 words
A digital receiver as in claim 17, wherein the signal decoder comprises an audio decoder for generating an analog audio signal.
Claim 23
Dependent Claim
20 words
A receiver as in claim 15, further comprising a deinterleaver providing feedback from the second decoder to the first decoder.
Claim 24
Dependent Claim
161 words
A digital receiver comprising: receiver circuitry for processing received modulated signals from one or both of a first channel and a second channel, to recover digital data corresponding to digital source information and a first coded sequence if the first channel is received, and to recover digital data corresponding to interleaved digital source information and a second coded sequence if the second channel is received; a code combiner, coupled to the receiver circuitry, for processing the first and second code sequences if available, to recover a first turbo encoded sequence corresponding to the digital source information and a second turbo encoded sequence corresponding to the interleaved digital source information; and an intelligent turbo decoder for recovering an accurate representation of the digital source information from an available two or more of: the digital data corresponding to the digital source information, the first turbo encoded sequence, the digital data corresponding to the interleaved digital source information, and the second turbo encoded sequence.
Claim 25
Dependent Claim
161 words
A digital receiver comprising: receiver circuitry for processing received modulated signals from one or both of a first channel and a second channel, to recover digital data corresponding to digital source information and a first coded sequence if the first channel is received, and to recover digital data corresponding to interleaved digital source information and a second coded sequence if the second channel is received; a code combiner, coupled to the receiver circuitry, for processing the first and second code sequences if available, to recover a first turbo encoded sequence corresponding to the digital source information and a second turbo encoded sequence corresponding to the interleaved digital source information; and an intelligent turbo decoder for recovering an accurate representation of the digital source information from an available two or more of: the digital data corresponding to the digital source information, the first turbo encoded sequence, the digital data corresponding to the interleaved digital source information, and the second turbo encoded sequence.
References Cited (Backward Citations)
US5191598A
Cited
US5406570A
Cited
US5446747A
Cited
US5278863A
Cited
US5319673A
Cited
US5485485A
Cited
US5408502A
Cited
US5438590A
Cited
US5544156A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-10-18 | 2003-04-19 | 2003-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-10-18 | 2007-04-19 | 2007-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-10-18 | 2011-04-19 | 2011-10-19 | $7700.00 | Window Closed / Lapsed |