US5657325A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmitter and method for transmitting information packets with incremental redundancy
Assignee: Nokia of America Corp
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Filing: 1996-04-26
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Granted: 1997-08-12
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Expires: 2016-04-26
Abstract
Abstract The present invention provides an improved wireless transmitter and method for transmitting incremental redundancy. In one illustrative embodiment of the present invention, switched antenna diversity is used in conjunction with punctured error correction codes to provide an independently fading channel for the punctured bits. In this embodiment, the transmitter includes an error correction encoder which outputs a punctured packet and punctured bits encoded from the information packet. The transmitter further includes a modulator for modulating the punctured packet and punctured bits, a first antenna for transmitting the modulated punctured packet to a receiver, and a second antenna for transmitting one or more of the punctured bits to the receiver, in response to a negative acknowledgment received by the transmitter. The first and second antennas in this embodiment are positioned to provide first and second channels having independent fading characteristics.
Inventors
- 👤 Hui Ling Lou
- 👤 Vijitha Weerackody
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:00
CPC Classifications
H; H04; H04L; H04L1/00; H04L1/12; H04L1/16; H04L1/18; H04L1/1867; H04L1/1893; H04B; H04B7/00; H04B7/02; H04B7/04; H04B7/06; H04B7/0602; H04B7/0604; H04B7/0608; H04B7/061; H04B7/0613; H04B7/0615; H04B7/0619; H04B7/0621; H04B7/0623; H04L1/02; H04L1/04; H04L1/06; H04L1/1812; H04L1/1819
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
176 words
A transmitter for transmitting an information packet with incremental redundancy, comprising: an error correction encoder for encoding the information packet with an error correction code, said encoder having a first output comprising a punctured packet and a second output comprising punctured bits; a modulator for modulating the punctured packet and one or more punctured bits; a first antenna for transmitting the modulated punctured packet over a first channel of a communication medium, to a receiver; a second antenna for transmitting the modulated punctured bits, over a second channel of the communication medium, to the receiver; wherein said first and second antennas are positioned to provide the first and second channels with substantially independent fading characteristics; and a controller for controlling the transmitter to modulate and transmit the punctured packet from the first antenna, over the first channel, to the receiver; and, in response to a negative acknowledgement from the receiver, for further controlling the transmitter to modulate and transmit the one or more punctured bits from the second antenna, over the second channel, to the receiver.
Claim 2
Dependent Claim
176 words
A transmitter for transmitting an information packet with incremental redundancy, comprising: an error correction encoder for encoding the information packet with an error correction code, said encoder having a first output comprising a punctured packet and a second output comprising punctured bits; a modulator for modulating the punctured packet and one or more punctured bits; a first antenna for transmitting the modulated punctured packet over a first channel of a communication medium, to a receiver; a second antenna for transmitting the modulated punctured bits, over a second channel of the communication medium, to the receiver; wherein said first and second antennas are positioned to provide the first and second channels with substantially independent fading characteristics; and a controller for controlling the transmitter to modulate and transmit the punctured packet from the first antenna, over the first channel, to the receiver; and, in response to a negative acknowledgement from the receiver, for further controlling the transmitter to modulate and transmit the one or more punctured bits from the second antenna, over the second channel, to the receiver.
Claim 3
Dependent Claim
21 words
The transmitter of claim 1, further comprising an error detection encoder for encoding the information packet with an error detection code.
Claim 4
Dependent Claim
12 words
The transmitter of claim 1, wherein said modulator includes a digital-to-analog convertor.
Claim 5
Dependent Claim
31 words
The transmitter of claim 1, wherein the first and second antennas each included an RF section, said RF section comprising a frequency up-convertor, a low noise amplifier, and a band-pass filter.
Claim 6
Independent Claim
112 words
A method for transmitting an information packet with incremental redundancy, comprising: encoding the information packet with an error correction code; forming a punctured packet and punctured bits from the encoded information packet; modulating the punctured packet and one or more punctured bits; transmitting the modulated punctured packet from a first antenna, over a first channel of a communication medium, to a receiver; and transmitting the modulated punctured bits from a second antenna, over a second channel of the communication medium, to the receiver, in response to a negative acknowledgement from the receiver; wherein said first and second antennas are positioned to provide the first and second channels with substantially independent fading characteristics.
Claim 7
Independent Claim
112 words
A method for transmitting an information packet with incremental redundancy, comprising: encoding the information packet with an error correction code; forming a punctured packet and punctured bits from the encoded information packet; modulating the punctured packet and one or more punctured bits; transmitting the modulated punctured packet from a first antenna, over a first channel of a communication medium, to a receiver; and transmitting the modulated punctured bits from a second antenna, over a second channel of the communication medium, to the receiver, in response to a negative acknowledgement from the receiver; wherein said first and second antennas are positioned to provide the first and second channels with substantially independent fading characteristics.
Claim 8
Dependent Claim
19 words
The method of claim 5, further comprising the step of encoding the information packet with an error detection code.
Claim 9
Dependent Claim
34 words
The method of claim 5, wherein the modulated punctured packet and modulated punctured bits each have a frequency, the method further comprising the step of up-converting the frequency to a higher frequency for transmission.
Claim 10
Dependent Claim
237 words
A transmitter for transmitting an information packet with incremental redundancy, comprising: an error correction encoder for encoding the information packet with an error correction code, said encoder having a first output comprising a punctured packet and a second output comprising punctured bits; a modulator for modulating the punctured packet and one or more punctured bits; said modulated punctured packet and modulated punctured bits each having a frequency; a frequency up-convertor for converting the frequency of the modulated punctured packet to a first higher frequency, and for converting the frequency of the modulated punctured bits to a second higher frequency; wherein the first and second frequencies are selected to provide first and second channels having substantially independent fading characteristics; an antenna for transmitting the modulated punctured packet at the first higher frequency, over the first channel of the communication medium, to a receiver, and for transmitting the modulated punctured bits at the second higher frequency, over the second channel of the communication medium, to the receiver; and a controller for controlling the transmitter to modulate and transmit the punctured packet from the antenna at the first frequency, over the first channel of the communication medium, to the receiver; and, in response to a negative acknowledgement from the receiver, for controlling the transmitter to modulate and transmit the one or more punctured bits at the second higher frequency, over the second channel of the communication medium, to the receiver.
Claim 11
Dependent Claim
237 words
A transmitter for transmitting an information packet with incremental redundancy, comprising: an error correction encoder for encoding the information packet with an error correction code, said encoder having a first output comprising a punctured packet and a second output comprising punctured bits; a modulator for modulating the punctured packet and one or more punctured bits; said modulated punctured packet and modulated punctured bits each having a frequency; a frequency up-convertor for converting the frequency of the modulated punctured packet to a first higher frequency, and for converting the frequency of the modulated punctured bits to a second higher frequency; wherein the first and second frequencies are selected to provide first and second channels having substantially independent fading characteristics; an antenna for transmitting the modulated punctured packet at the first higher frequency, over the first channel of the communication medium, to a receiver, and for transmitting the modulated punctured bits at the second higher frequency, over the second channel of the communication medium, to the receiver; and a controller for controlling the transmitter to modulate and transmit the punctured packet from the antenna at the first frequency, over the first channel of the communication medium, to the receiver; and, in response to a negative acknowledgement from the receiver, for controlling the transmitter to modulate and transmit the one or more punctured bits at the second higher frequency, over the second channel of the communication medium, to the receiver.
Claim 12
Independent Claim
155 words
A method for transmitting an information packet with incremental redundancy, comprising: encoding the information packet with an error correction code; forming a punctured packet and punctured bits from the encoded information packet; modulating the punctured packet and one or more punctured bits, said modulated punctured packet and modulated punctured bits each having a frequency; converting the frequency of the modulated punctured packet to a first higher frequency and converting the frequency of the one or more modulated punctured bits to a second higher frequency; wherein the first and second frequencies are selected to provide first and second channels having substantially independent fading characteristics; transmitting the modulated punctured packet at the first higher frequency, over the first channel of the communication medium, to a receiver; and transmitting the modulated punctured bits at the second higher frequency, over the second channel of the communication medium, to the receiver, in response to a negative acknowledgement from the receiver.
Claim 13
Independent Claim
155 words
A method for transmitting an information packet with incremental redundancy, comprising: encoding the information packet with an error correction code; forming a punctured packet and punctured bits from the encoded information packet; modulating the punctured packet and one or more punctured bits, said modulated punctured packet and modulated punctured bits each having a frequency; converting the frequency of the modulated punctured packet to a first higher frequency and converting the frequency of the one or more modulated punctured bits to a second higher frequency; wherein the first and second frequencies are selected to provide first and second channels having substantially independent fading characteristics; transmitting the modulated punctured packet at the first higher frequency, over the first channel of the communication medium, to a receiver; and transmitting the modulated punctured bits at the second higher frequency, over the second channel of the communication medium, to the receiver, in response to a negative acknowledgement from the receiver.
Claim 14
Dependent Claim
242 words
A transmitter for transmitting an information packet with incremental redundancy, comprising: an error correction encoder for encoding the information packet with an error correction code, said encoder having a first output comprising a punctured packet and a second output comprising punctured bits; a modulator for modulating the punctured packet and one or more punctured bits; a multiplier for applying a first set of M fixed phase offsets to the modulated punctured packet, and a second set of M fixed phase offsets to the modulated punctured bits; said first and second sets of M fixed phase offsets selected to provide first and second channels having substantially independent fading characteristics; M antennas for transmitting the modulated punctured packet over the first channel of a communication medium, with the first set of M fixed phase offsets, to a receiver; and, for transmitting the modulated punctured bits over the second channel of the communication medium, with the second set of M fixed phase offsets, to the receiver; and a controller for controlling the transmitter to modulate and transmit the punctured packet with the first set of M fixed phase offsets from the M antennas, over the first channel, to the receiver; and, in response to a negative acknowledgment from the receiver, for further controlling the transmitter to modulate and transmit the one or more punctured bits with the second set of M fixed phase offsets from the M antennas, over the second channel, to the receiver.
Claim 15
Dependent Claim
242 words
A transmitter for transmitting an information packet with incremental redundancy, comprising: an error correction encoder for encoding the information packet with an error correction code, said encoder having a first output comprising a punctured packet and a second output comprising punctured bits; a modulator for modulating the punctured packet and one or more punctured bits; a multiplier for applying a first set of M fixed phase offsets to the modulated punctured packet, and a second set of M fixed phase offsets to the modulated punctured bits; said first and second sets of M fixed phase offsets selected to provide first and second channels having substantially independent fading characteristics; M antennas for transmitting the modulated punctured packet over the first channel of a communication medium, with the first set of M fixed phase offsets, to a receiver; and, for transmitting the modulated punctured bits over the second channel of the communication medium, with the second set of M fixed phase offsets, to the receiver; and a controller for controlling the transmitter to modulate and transmit the punctured packet with the first set of M fixed phase offsets from the M antennas, over the first channel, to the receiver; and, in response to a negative acknowledgment from the receiver, for further controlling the transmitter to modulate and transmit the one or more punctured bits with the second set of M fixed phase offsets from the M antennas, over the second channel, to the receiver.
Claim 16
Independent Claim
159 words
A method for transmitting an information packet with incremental redundancy, comprising: encoding the information packet with an error correction code; forming a punctured packet and punctured bits from the encoded information packet; modulating the punctured packet and one or more punctured bits; applying a first set of M fixed phase offsets to the modulated punctured packet, and a second set of M fixed phase offsets to the modulated punctured bits; said first and second sets of M fixed phase offsets selected to provide first and second channels having substantially independent fading characteristics; transmitting the modulated punctured packet over the first channel of a communication medium, from M antennas, with the first set of M fixed phase offsets, to a receiver; and transmitting the modulated punctured bits over the second channel of the communication medium, from the M antennas, with the second set of M fixed phase offsets, to the receiver, in response to a negative acknowledgement from the receiver.
Claim 17
Independent Claim
159 words
A method for transmitting an information packet with incremental redundancy, comprising: encoding the information packet with an error correction code; forming a punctured packet and punctured bits from the encoded information packet; modulating the punctured packet and one or more punctured bits; applying a first set of M fixed phase offsets to the modulated punctured packet, and a second set of M fixed phase offsets to the modulated punctured bits; said first and second sets of M fixed phase offsets selected to provide first and second channels having substantially independent fading characteristics; transmitting the modulated punctured packet over the first channel of a communication medium, from M antennas, with the first set of M fixed phase offsets, to a receiver; and transmitting the modulated punctured bits over the second channel of the communication medium, from the M antennas, with the second set of M fixed phase offsets, to the receiver, in response to a negative acknowledgement from the receiver.
References Cited (Backward Citations)
US5416787A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-08-11 | 2001-02-10 | 2001-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-08-11 | 2005-02-10 | 2005-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-08-11 | 2009-02-10 | 2009-08-12 | $7700.00 | Window Closed / Lapsed |