Patent EP0735701A2 successfully refreshed from Google Patents.
EP0735701A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Switched antenna diversity transmission method and system using ARQ techniques
Assignee: Nokia of America Corp
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Filing: 1996-03-26
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Granted: —
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Expires: 2016-03-26
Abstract
Abstract The present invention is an improved switched antenna diversity transmission system (50) for use with an ARQ error protection protocol. The transmitter of the present invention includes an error detection encoder (62) for encoding information packets (from 60) with an error detection code, a modulator (64) for modulating the encoded information packets, and a first antenna (TA 1 ) for transmitting the modulated information packets over a first forward channel of a wireless communication medium to a receiver. The transmitter further includes a switch (66) for switching from the first antenna to a second antenna (--- TA M ) for transmitting the information packets over a second forward channel of a wireless communication medium in response to a negative acknowledgment from the receiver transmitted over a feedback channel (91) of the wireless communication medium.
Inventors
- 👤 Vijitha Weerackody
- 👤 William Glenn Zeng
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 05:27
CPC Classifications
H; H04; H04L; H04L1/00; H04L1/004; H04L1/0056; H04L1/0067; H04L1/0068; H04B; H04B7/00; H04B7/02; H04B7/04; H04B7/06; H04B7/0602; H04B7/0608; H04B7/061; H04L1/0071; H04L1/02; H04L1/04; H04L1/06; H04L1/12; H04L1/16; H04L1/18; H04L1/1812; H04L1/1819; H04L2001/0098
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
118 words
A transmitter for transmitting information packets over a wireless communication medium to a receiver, comprising: an error detection encoder for encoding the information packets with an error detection code; a modulator for modulating the error detection encoded information packets; a first antenna for transmitting the modulated information packets over a first forward channel of the communication medium to the receiver; a second antenna for transmitting the modulated information packets over a second forward channel of the communication medium to the receiver in place of the first antenna; and a switch for switching from the first antenna to the second antenna in response to a negative acknowledgement from the receiver transmitted over a feedback channel of the communication medium.
Claim 2
Dependent Claim
14 words
The transmitter of claim 1, wherein the error detection encoder is a CRC-16 encoder.
Claim 3
Dependent Claim
12 words
The transmitter of claim 1, wherein the modulator is a 4-DPSK modulator.
Claim 4
Dependent Claim
24 words
The transmitter of claim 1, wherein the switch is a hardware switch, or a programmable switch, or an electronic switch, or a magnetic switch.
Claim 5
Independent Claim
94 words
A method of transmitting information packets over a wireless communication medium to a receiver, comprising: encoding the information packets with an error detection code; modulating the error detection encoded information packets; transmitting the modulated information packets from a first antenna over a first forward channel of the communication medium to the receiver; and switching from the first antenna to a second antenna for transmitting the modulated packets over a second forward channel of the communication medium in response to a negative acknowledgement from the receiver transmitted over a feedback channel of the communication medium.
Claim 6
Dependent Claim
153 words
A transmitter for transmitting a JPEG image over a wireless communication medium to a receiver with unequal error protection, comprising: a separator for separating the JPEG image into Type-I and Type-II information; an error detection encoder for encoding the Type-I information with an error detection code; an error correction encoder for encoding the Type-II information with an error correction code; a modulator for modulating the encoded Type-I and Type-II information; a first antenna for transmitting the modulated Type-I and Type-II information over a first forward channel of the communication medium to the receiver; a second antenna for transmitting the modulated Type-I and Type-II information over a second forward channel of the communication medium to the receiver in place of the first antenna; and a switch for switching from the first antenna to the second antenna in response to a negative acknowledgment from the receiver transmitted over a feedback channel of the communication medium.
Claim 7
Dependent Claim
17 words
The transmitter of claim 1 or 6, wherein the first forward channel is a slow fading channel.
Claim 8
Dependent Claim
17 words
The transmitter of claim 1 or 6, wherein the second forward channel is a slow fading channel.
Claim 9
Dependent Claim
13 words
The transmitter of claim 6, wherein the separator is a digital signal processor.
Claim 10
Dependent Claim
14 words
The transmitter of claim 6, wherein the digital signal processor is an AT&T DSP32C.
Claim 11
Dependent Claim
22 words
The transmitter of claim 6, wherein the error correction encoder encodes the Type-II information with a rate 1/2, memory 4 convolutional code.
Claim 12
Dependent Claim
153 words
A transmitter for transmitting a JPEG image over a wireless communication medium to a receiver with unequal error protection, comprising: a separator for separating the JPEG image into Type-IA and Type-IB information; an error detection encoder for encoding the Type-IA information with an error detection code; an error correction encoder for encoding the Type-IB information with an error correction code; a modulator for modulating the encoded Type-IA and Type-IB information; a first antenna for transmitting the modulated Type-IA and Type-IB information over a first forward channel of the communication medium to the receiver; a second antenna for transmitting the modulated Type-IA and Type-IB information over a second forward channel of the communication medium to the receiver in place of the first antenna; and a switch for switching from the first antenna to the second antenna in response to a negative acknowledgment from the receiver transmitted over a feedback channel of the communication medium.
Claim 13
Dependent Claim
141 words
A transmitter for transmitting a JPEG image over a wireless communication medium to a receiver with unequal error protection, comprising: a separator for separating the JPEG image into Type-I and Type-II information; an error detection encoder for encoding the Type-I information with an error detection code; a modulator for modulating the encoded Type-I information and the Type-II information; a first antenna for transmitting the modulated Type-I and Type-II information over a first forward channel of the communication medium to the receiver; a second antenna for transmitting the modulated Type-I and Type-II information over a second forward channel of the communication medium to the receiver in place of the first antenna; and a switch for switching from the first antenna to the second antenna in response to a negative acknowledgment from the receiver transmitted over a feedback channel of the communication medium.
Claim 14
Dependent Claim
141 words
A transmitter for transmitting a JPEG image over a wireless communication medium to a receiver with unequal error protection, comprising: a separator for separating the JPEG image into Type-IA and Type-IB information; an error detection encoder for encoding the Type-IA information with an error detection code; a modulator for modulating the encoded Type-IA information and the Type-IB information; a first antenna for transmitting the modulated Type-IA and Type-IB information over a first forward channel of the communication medium to the receiver; a second antenna for transmitting the modulated Type-IA and Type-IB information over a second forward channel of the communication medium to the receiver in place of the first antenna; and a switch for switching from the first antenna to the second antenna in response to a negative acknowledgment from the receiver transmitted over a feedback channel of the communication medium.
Claim 15
Independent Claim
122 words
A method for transmitting a JPEG image over a wireless communication medium to a receiver with unequal error protection, comprising: separating the JPEG image into Type-I and Type-II information; encoding the Type-I information with an error detection code; encoding the Type-II information with an error correction code; modulating the encoded Type-I and Type-II information; transmitting the modulated Type-I and Type-II information from a first antenna over a first forward channel of the communication medium to the receiver; and switching from the first antenna to a second antenna for transmitting the modulated Type-I and Type-II information over a second forward channel of the communication medium in response to a negative acknowledgment from the receiver transmitted over a feedback channel of the communication medium.
Claim 16
Independent Claim
122 words
A method for transmitting a JPEG image over a wireless communication medium to a receiver with unequal error protection, comprising: separating the JPEG image into Type-IA and Type-IB information; encoding the Type-IA information with an error detection code; encoding the Type-IA information with an error correction code; modulating the encoded Type-IA and Type-IB information; transmitting the modulated Type-IA and Type-IB information from a first antenna over a first forward channel of the communication medium to the receiver; and switching from the first antenna to a second antenna for transmitting the modulated Type-I and Type-II information over a second forward channel of the communication medium in response to a negative acknowledgment from the receiver transmitted over a feedback channel of the communication medium.
Claim 17
Independent Claim
115 words
A method of transmitting a JPEG image over a wireless communication medium to a receiver with unequal error protection, comprising: separating the JPEG image into Type-I and Type-II information; encoding the Type-I information with an error detection code; modulating the encoded Type-I information and the Type-II information; transmitting the modulated Type-I and Type-II information from a first antenna over a first forward channel of the communication medium to the receiver; and switching from the first antenna to a second antenna for transmitting the modulated Type-I and Type-II information over a second forward channel of the communication medium in response to a negative acknowledgment from the receiver transmitted over a feedback channel of the communication medium.
Claim 18
Independent Claim
115 words
A method of transmitting a JPEG image over a wireless communication medium to a receiver with unequal error protection, comprising: separating the JPEG image into Type-IA and Type-IB information; encoding the Type-IA information with an error detection code; modulating the encoded Type-IA information and the Type-IB information; transmitting the modulated Type-IA and Type-IB information from a first antenna over a first forward channel of the communication medium to the receiver; and switching from the first antenna to a second antenna for transmitting the modulated Type-IA and Type-IB information over a second forward channel of the communication medium in response to a negative acknowledgment from the receiver transmitted over a feedback channel of the communication medium.
References Cited (Backward Citations)
EP0622911A2
Cited
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