Patent EP0599632A2 successfully refreshed from Google Patents.
EP0599632A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Apparatus and methods for wireless communications
Assignee: Commonwealth Scientific and Industrial Research Organisation
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Filing: 1993-11-24
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Granted: —
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Expires: 2013-11-24
Abstract
Abstract The present invention discloses a wireless LAN, a peer-to-peer wireless LAN, a wireless transceiver and a method of transmitting data, all of which are capable of operating at frequencies in excess of 10GHz and in multipath transmission environments. This is achieved by a combination of techniques which enable adequate performance in the presence of multipath transmission paths where the reciprocal of the information bit rate of the transmission is short relative to the time delay differences between significant ones of the multipath transmission paths. In the LANs the mobile transceivers are each connected to, and powered by, a corresponding portable electronic device with computational ability.
Inventors
- 👤 John David O'sullivan
- 👤 Graham Ross Daniels
- 👤 Terence Michael Paul Percival
- 👤 Diethelm Ironi Ostry
- 👤 John Fraser Deane
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 22:31
CPC Classifications
H; H04; H04L; H04L1/00; H04L1/004; H04L1/0056; H04L1/0059; H04L1/006; H04L1/0061; H04L1/0071; H04L5/00; H04L5/02; H04L5/023; H04L1/12; H04L1/16; H04L1/18; H04L1/1809
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
123 words
A wireless LAN comprising a plurality of hub transceivers each connected together to constitute a data source and/or destination, and a plurality of mobile transceivers each able to communicate by radio transmissions with any one(s) of said hub transceivers within a predetermined range, wherein each of said mobile transceivers are connectable to, and able to be powered by, a corresponding portable electronic device with computational ability, said radio transmissions have a frequency in excess of 10 GHz, and all the transceivers are configured to receive and transmit in a multipath transmission environment, the reciprocal of the information bit rate of said transceiver's transmission being short relative to the time delay differences between significant ones of the transmission paths of said multipath transmission environment.
Claim 2
Dependent Claim
106 words
A peer-to-peer wireless LAN having a plurality of mobile transceivers each able to communicate by radio transmissions with any other like transceiver within a predetermined range, wherein each of said mobile transceivers are connectable to, and able to be powered by, a corresponding portable electronic device with computational ability, said radio transmissions have a frequency in excess of 10 GHz, and all the transceiver's transmission are configured to receive and transmit in a multipath transmission environment, the reciprocal of the information bit rate of said transceivers being short relative to the time delay differences between significant ones of the transmission paths of said multipath transmission environment.
Claim 3
Dependent Claim
68 words
The LAN as claimed in claim 1 or 2, wherein the transmission is enhanced by the use of one or more of the techniques selected from the group of techniques consisting of: interactive channel sounding; forward error correction with redundancy sufficient for non-interactive connection; modulation with redundancy sufficient for interactive error correction by re-transmission of at least selected data; and the choice of allocation of data between channels.
Claim 4
Dependent Claim
38 words
The LAN as claimed in claim 3, wherein the transmission is divided into small packets of data each of which is transmitted over a time period in which the transmission characteristics over said predetermined range are relatively constant.
Claim 5
Dependent Claim
28 words
The LAN as claimed in any one of claims 1-4, wherein the coding of data is carried out on an ensemble of carriers each of a different frequency.
Claim 6
Dependent Claim
23 words
The LAN as claimed in claim 5, wherein the modulation of each individual carrier is multi-level modulation of carrier amplitude and/or phase (mQAM).
Claim 7
Dependent Claim
44 words
The LAN as claimed in claim 6, wherein said mQAM is form the modulation family consisting of: amplitude shift keying (ASK), multi-level ASK (mASK); permutation modulation; binary phase shift keying (BPSK); multi-level phase shift keying (mPSK); amplitude phase keying (APK); and multi-level APK (mAPK).
Claim 8
Independent Claim
92 words
A method of transmitting data between at least one hub transceiver and a plurality of mobile transceivers within a predetermined cell range or between said mobile transceivers, wherein said data transmission is a multipath transmission having a frequency in excess of 10GHz, each said mobile transceiver is connected to, and is powered by, a corresponding portable electronic device with computational ability, and the reciprocal of the information bit rate of said transmissions is short relative to the time delay differences between significant ones of the transmission paths of said multipath transmission environment.
Claim 9
Dependent Claim
66 words
The method as claimed in claim 8, wherein the transmission is enhanced by the use of one or more of the techniques selected from the group of techniques consisting of: interactive channel sounding; forward error correction with redundancy sufficient for non-interactive connection; modulation with redundancy sufficient for interactive error correction by re-transmission of at least selected data; and the choice of allocation of data between channels.
Claim 10
Dependent Claim
38 words
The method as claimed in claim 9, wherein the transmission is divided into small packets of data each of which is transmitted over a time period in which the transmission characteristics over said predetermined range are relatively constant.
Claim 11
Independent Claim
28 words
The method as claimed in any one of claims 8-10, wherein the coding of data is carried out on an ensemble of carriers each of a different frequency.
Claim 12
Dependent Claim
23 words
The method as claimed in claim 11, wherein the modulation of each individual carrier is multi-level modulation of carrier amplitude and/or phase (mQAM).
Claim 13
Dependent Claim
44 words
The method as claimed in claim 12, wherein said mQAM is form the modulation family consisting of: amplitude shift keying (ASK), multi-level ASK (mASK); permutation modulation; binary phase shift keying (BPSK); multi-level phase shift keying (mPSK); amplitude phase keying (APK); and multi-level APK (mAPK).
Claim 14
Dependent Claim
55 words
A wireless transceiver operable to transmit and receive radio transmissions having a frequency in excess of 10GHz in a multipath transmission environment in which the reciprocal of the information bit rate of the trasnceiver's transmission is short relative to the time delay differences between significant ones of the transmission paths of said multipath transmission environment.
Claim 15
Dependent Claim
20 words
The transceiver as claimed in claim 14, wherein the transmission is by means of modulation of an ensemble of carriers.
Claim 16
Dependent Claim
39 words
The transceiver as claimed in claim 15, wherein the transceiver has a modulation/demodulation system which incorporates fast Fourier transform devices and inverse fast Fourier transform devices for the generation and detection of said modulation of an ensemble of carriers.
Claim 17
Independent Claim
48 words
An apparatus operable to transmit and/or receive radio transmissions in a multipath transmission environment in which the reciprocal of the information bit rate of the apparatus transmission is short relative to the time delay differences between significant ones of the transmission paths expected in said multipath transmission environment.
Claim 18
Dependent Claim
35 words
An apparatus as claimed in claim 17, wherein the transmission is by means of modulation of an ensemble of carriers, the reciprocal of the bit rate per carrier being greater than said time delay differences.
Claim 19
Dependent Claim
37 words
An apparatus as claimed in claim 18, having a modulation and/or demodulation means which incorporates fast Fourier transform and/or inverse fast Fourier transform functions for the generation and/or detection of said modulation of an ensemble of carriers.
Claim 20
Dependent Claim
22 words
An apparatus according to claim 17, 18 or 19 wherein data is communicated in packets lasting of the order of 100 microseconds.
Claim 21
Independent Claim
25 words
An apparatus according to any of claims 17 to 20 wherein said time delay differences are expected to be of the order of 50 nanoseconds.
References Cited (Backward Citations)
No citation records indexed.
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