WO2014186615A1 - Système de communication à multiples antennes - Google Patents

Système de communication à multiples antennes Download PDF

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Publication number
WO2014186615A1
WO2014186615A1 PCT/US2014/038260 US2014038260W WO2014186615A1 WO 2014186615 A1 WO2014186615 A1 WO 2014186615A1 US 2014038260 W US2014038260 W US 2014038260W WO 2014186615 A1 WO2014186615 A1 WO 2014186615A1
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WO
WIPO (PCT)
Prior art keywords
network
power
radio
antennas
antenna
Prior art date
Application number
PCT/US2014/038260
Other languages
English (en)
Inventor
Branislav Petrovic
David Barr
Original Assignee
Entropic Communications, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Entropic Communications, Inc. filed Critical Entropic Communications, Inc.
Publication of WO2014186615A1 publication Critical patent/WO2014186615A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits

Definitions

  • the disclosed method and apparatus relates generally to communication networks, and more particularly to systems and methods for simplifying a multiple antenna communication system.
  • a local network may include several types of devices configured to deliver subscriber services throughout a home, office, or other similar environments. These subscriber services include delivering multimedia data content, such as streaming audio and video data, to devices located throughout the location of the network. As the number of available subscriber services has increased and have become more popular, the number of devices being connected within each local network has also increased. With increasing devices delivering and accessing multimedia data content in such environments, the number and types of networks over which such content is shared has also increased.
  • the network of FIG. 1 is one example of a multimedi network implemented in a residence 101.
  • a wired communications medium 100 is shown deployed in the residence 100.
  • the wired communications medium might be a coaxial cable system, a power line system, a fiber optic cable system, an Ethernet cable system, or other similar communications medium.
  • the communications medium 100 is coaxial cabling deployed within the residence 101.
  • MoCA Multimedia over Coax Alliance
  • the network of FIG. 1 includes a plurality of network nodes 104, 105, 106 in communication according to a communications protocol.
  • the communications protocol might conform to a networking standard, such as the well-known MoCA standard.
  • the communications protocol specifies a packet based communications system. Nodes in such a network can be associated with a variety of devices. For example, in a system deployed in a residence 101. a node 105 may be a network communications module associated with a computer 1 10. The node 105 allows the computer 1 10 to communicate over the communications medium 100.
  • a node 106 may be associated with a television 1 1 1 to allow the television 1 1 1 to receive and display media streamed from one or more other network nodes.
  • a node might also be associated with a speaker or other media playing devices that plays music.
  • Set-top boxes 108 and other devices also may be configured to include sufficient functionality integrated therein to communicate directly over the communications medium 100.
  • a node 104 might also be associated with a modem configured to interface with a wide-area network service provider 1 12 through the Internet "cloud" 120, for example, to provide Internet access, digital video recording capabilities, media streaming functions, and/or network management services to the residence 101.
  • a "hybrid" device that is hardwired to the wired network can send information it received over the wired network to devices that are portable and that rely on a wireless network connection to communicate information. Similarly, the hybrid device can relay onto the wired home network information received from portable or other devices transmitting over the wireless network.
  • video content (such as a movie) may enter the home from the Internet over a cable modem.
  • the cable modem may then communicate with a set top box within the home over a MoCA network.
  • the cable modem may be connected to a storage device that services the network by storing content to be distributed to devices within the home. That content may then be communicated to devices connected to Wi-Fi networks through any of the MoCA devices that can serve as a bridge between the wired and wireless networks.
  • FIG. 1 shows the second-story rooms of the residence 101 as having bridges 1 13, 1 14 between wireless and wired networks.
  • this example shows radio-based bridges 1 13, 1 14 that can communicate with a wired (e.g., MoCA based) communications network 100 and can also communicate wirelessly to wireless (e.g. , IEEE 802.1 1 based) network devices.
  • wireless network devices with which the bridges 1 13, 1 14 can communicate include televisions 221 -226.
  • the bridges 1 13, 1 14 may also communicate with other wireless devices 230-234, which can include, for example, DVD players, gaming consoles, computers, smart phones, tablets, and other devices with wireless networking capabilities.
  • FIG. 2 is a block diagram illustrating an example configuration of a bridge 300 between two networks having two separate subsystems, each communicating via a standard interface.
  • network 1 is a MoCA network
  • network 2 is a Wi-Fi network.
  • the transmit/receive chain for the MoCA network includes a transceiver 131 , appropriate amplification, including power amplifiers and low noise amplifiers 141 , and a di- plexer 137.
  • the transmit/receive chain for the Wi-Fi network includes transceivers 132, 133, 134, power and low noise amplifiers 142, 143, 144, a diplexer 138, and a filter 139.
  • transceivers 132, 133, 134 include a 2.4 GHz transceiver and two 5 GHz transceivers.
  • An interface 140 can be included to facilitate bridging between wired and wireless subsystems, such as by allowing communications between MoCA baseband 121 and Wi-Fi baseband 122. Examples of interface 140 can include RGMII, GMIl, Mil, 1 Mi l (double clocked Mil), PCI, and the like.
  • the bridge 300 can also include additional communication interfaces to communicate with devices through means other than via the associated networks.
  • Wi-Fi technology e.g., the IEEE 802.1 1 ⁇ standard
  • MIMO multiple-input multiple- output
  • each additional antenna requires additional power amplifiers and low-noise amplifiers to accommodate the additional antenna(s). Doing so increases the complexity, cost, and power consumption of the system.
  • Embodiments of the disclosed technology can be implemented to provide a radio system with multiple antennas (e.g. in a M1MO application) without requiring additional power amplifier(s) or low noise amplifier(s) as conventionally required conventionally required for additional antenna(s).
  • a sufficient number of additional antennas can be added to a radio system such that the power amplifier and low noise amplifiers conventionally required for each antenna can be eliminated entirely, thereby decreasing the complexity, cost, and power consumption of the system.
  • a single antenna naturally provides a receive signal level and a transmit signal level regardless of amplification.
  • adding a second antenna does not simply double those signal levels; instead, the resulting signal levels increase in a quadratic relation, so the resulting signal is four times greater in effective radiated power (i.e., the power increases at 201ogN rate).
  • the electromagnetic field adds coherently (in-phase).
  • the field strength is thus doubled, and the power, proportional to the square o the field, quadruples.
  • reception corresponds to field strength at a receiving antenna.
  • coherent summing of received signals corresponds to superposition of received field strengths.
  • the same quadratic power relation for can be achieved for signal reception.
  • the disclosed technology provides a system and method for allowing the addition of antennas to radio systems, particularly radio systems in accordance with the Wi-Fi standards, without increasing the complexity, cost, and power consumption of the resulting circuitry.
  • Multiple antennas, implemented and distributed according to embodiments of the presently described technology enable the combinati n of received or transmitted signals in such a way as to achieve a quadratic improvement, in a manner not unlike what w uld be achieved by an impracticably larger antenna.
  • the disclosed technology thus lends itself to fully integrating all of the necessary radio circuitry of an embodiment into a single low-power integrated circuit.
  • FIG. 1 is a diagram, illustrating an example of a home networking environment using a combination of a wired network and a wireless network.
  • FIG. 2 is a block diagram illustrating an example configuration of a bridge between a wired network and a wireless network, the bridge having two separate systems mutually communicating through a standard interface.
  • FIG. 3 is a block diagram showing one embodiment of the disclosed technology with direct coupling between a plurality of antennas and a corresponding plurality of transceiver units.
  • Embodiments of the disclosed technology comprise a system and method for allowing the addition of antennas to radio systems, particularly radio systems in accordance with the Wi-Fi standards, without increasing the complexity, cost, and power consumption of the resulting circuitry.
  • a sufficient number of additional antennas can be added to a radio system such that the power amplifier and low noise amplifiers conventionally required for each antenna can be eliminated entirely, thereby decreasing the complexity, cost, and power consumption of the resulting circuitry.
  • FIG. 3 is a block diagram showing one embodiment of the present invention with direct coupling between a plurality of antennas and a corresponding plurality of transceiver units.
  • a radio baseband circuit provides conventional radio decoding and encoding functionality, similar to the Wi-Fi baseband circuit 122 shown in FIG. 2.
  • a plurality of N transceivers 402i-402,v, similar to the transceivers shown in FIG. 2, are provided, one for each of N corresponding antennas 404 t -401 ⁇ 2. It should be noted that the N antennas 4041 -404 ⁇ » are directly coupled to the N transceivers 402] -402A; with no intervening power amplifiers or low noise amplifiers, unlike the conventional circuit shown in FIG. 2.
  • the circuit configuration shown in FIG. 3 is possible because a single antenna naturally provides a receive signal level and a transmit signal level regardless of amplification. However, adding a second antenna does not simply double those signal levels; instead, the resulting signal levels increase in a quadratic relation, so the resulting signal is four times greater in effective radiated power (i.e. , the power increases at 201ogN rate). This is because the electromagnetic field adds coherently (in-phase). For the two-antenna example, the field strength is thus doubled, and the power, proportional to the square of the field, quadruples.
  • receive signal strength corresponds to field strength at a receiving antenna.
  • coherent summing of received signals corresponds to su- perposition of received field strengths.
  • the invention achieves the same quadratic power relation for receptions as for transmissions.
  • the effective receive signal power and effective transmit signal power of the radio as a whole can be 100 times or 20dB higher that of the same radio with a single antenna.
  • the effect is equivalent to a power amplifier of 20dB gain in the transmit direction, and a low-noise amplifier (LNA) of 20dB of gain in the receive direction.
  • LNA low-noise amplifier
  • a desired receive signal level and a transmit signal level can be achieved.
  • fabricating a 1 W transmitter may be a challenge to monolithically integrate into a "system on a chip" (SOC) integrated circuit, integrating ten 1 OmW devices may be much easier into an SOC design or other 1C design.
  • SOC system on a chip
  • a digital-to-analog converter (DAC) transmitter may be able to produce lOmW of RF power without any power amplifier.
  • DAC digital-to-analog converter
  • ADC analog-to-digital converter receivers.
  • an amplifier-less implementation or a transmitter, receiver or transceiver may be achieved.
  • a fewer number of antennas than 10 may be sufficient in some applications. In other applications, a greater number of antennas may be used to further increase the benefits of the disclosed technology.
  • the N antennas 404) -404 v should be reasonably well isolated; spacing them at least quarter- wavelength apart should suffice.
  • the transceivers and baseband processing ensure the proper phasing of the antennas to achieve desired radiation characteristics. Any of the methods used in wireless standards, such as I MO and beam forming, can be used.
  • the present disclosed technology provides a system and method for allowing the addition of antennas to radio systems, particularly radio systems in accordance with the Wi-Fi standards, without increasing the complexity, cost, and power consumption of the resulting circuitry.
  • Multiple antennas, implemented and distributed according to the presently disclosed technology enable the combination of received or transmitted signals in such a way as to achieve a quadratic improvement, in a manner not unlike what would be achieved by an impracticably larger antenna.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Selon l'invention, une architecture radio moins amplificatrice fournit un système et un procédé pour permettre l'ajout de multiples antennes à des systèmes radio, en particulier des systèmes radio selon les normes Wi-fi, sans augmenter la complexité, le coût, et la consommation de puissance de la circuiterie résultante. De multiples antennes, directement couplées à des émetteurs et des récepteurs, permettent la combinaison de signaux reçus ou émis afin d'obtenir une amélioration quadratique, d'une manière différente de celle qui serait obtenue par une antenne plus grande impraticable. L'invention aide ainsi celle-ci à entièrement intégrer toute la circuiterie radio nécessaire dans un circuit intégré moins amplificateur à faible puissance unique.
PCT/US2014/038260 2013-05-15 2014-05-15 Système de communication à multiples antennes WO2014186615A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201361823716P 2013-05-15 2013-05-15
US61/823,716 2013-05-15

Publications (1)

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WO2014186615A1 true WO2014186615A1 (fr) 2014-11-20

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0246640A2 (fr) * 1986-05-23 1987-11-25 Ball Corporation Modules d'émission-réception pour système d'antenne à commande de phase
EP1049195A2 (fr) * 1999-04-26 2000-11-02 Andrew AG Structure d' antenne et leur installation
WO2002069443A1 (fr) * 2001-02-28 2002-09-06 Itt Manufacturing Enterprises, Inc. Architecture integree de formeur de faisceaux
US20040043731A1 (en) * 2002-08-30 2004-03-04 Wei Xiong Power amplifier bypass in a half-duplex IC
US20100020741A1 (en) * 2005-11-28 2010-01-28 Philip Hahn Wireless communication system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0246640A2 (fr) * 1986-05-23 1987-11-25 Ball Corporation Modules d'émission-réception pour système d'antenne à commande de phase
EP1049195A2 (fr) * 1999-04-26 2000-11-02 Andrew AG Structure d' antenne et leur installation
WO2002069443A1 (fr) * 2001-02-28 2002-09-06 Itt Manufacturing Enterprises, Inc. Architecture integree de formeur de faisceaux
US20040043731A1 (en) * 2002-08-30 2004-03-04 Wei Xiong Power amplifier bypass in a half-duplex IC
US20100020741A1 (en) * 2005-11-28 2010-01-28 Philip Hahn Wireless communication system

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