GB2507519A - Wireless low noise block down converter (LNB) - Google Patents

Wireless low noise block down converter (LNB) Download PDF

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Publication number
GB2507519A
GB2507519A GB1219635.8A GB201219635A GB2507519A GB 2507519 A GB2507519 A GB 2507519A GB 201219635 A GB201219635 A GB 201219635A GB 2507519 A GB2507519 A GB 2507519A
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GB
United Kingdom
Prior art keywords
lnb
wireless
digital receiver
channel
gets
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
GB1219635.8A
Other versions
GB201219635D0 (en
Inventor
Ahmed Tajelsir Mahjoub
Ahmed Hassan El-Tayib
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Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB1219635.8A priority Critical patent/GB2507519A/en
Publication of GB201219635D0 publication Critical patent/GB201219635D0/en
Publication of GB2507519A publication Critical patent/GB2507519A/en
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/20—Adaptations for transmission via a GHz frequency band, e.g. via satellite
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/18523—Satellite systems for providing broadcast service to terrestrial stations, i.e. broadcast satellite service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H40/00—Arrangements specially adapted for receiving broadcast information
    • H04H40/18—Arrangements characterised by circuits or components specially adapted for receiving
    • H04H40/27—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95
    • H04H40/90—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for satellite broadcast receiving
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/426—Internal components of the client ; Characteristics thereof
    • H04N21/42607—Internal components of the client ; Characteristics thereof for processing the incoming bitstream
    • H04N21/4263—Internal components of the client ; Characteristics thereof for processing the incoming bitstream involving specific tuning arrangements, e.g. two tuners
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
    • H04N21/4363—Adapting the video or multiplex stream to a specific local network, e.g. a IEEE 1394 or Bluetooth® network
    • H04N21/43637—Adapting the video or multiplex stream to a specific local network, e.g. a IEEE 1394 or Bluetooth® network involving a wireless protocol, e.g. Bluetooth, RF or wireless LAN [IEEE 802.11]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/61—Network physical structure; Signal processing
    • H04N21/6106—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network
    • H04N21/6143—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network involving transmission via a satellite

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Radio Relay Systems (AREA)

Abstract

The wireless low noise block down converter (LNB, LNC or LND) comprises a wireless transceiver unit, antenna 15, power source interface 11, 23, plus an Ethernet console port 19. The communication process starts with an end user channel request made through a digital receiver (18, Figure 3); the requested channel is encapsulated with MAC address and then modulated with a radio channel for wireless transmission using the WLAN standard IEEE 802.11, received at the LNB side. Requested channels are separated (demodulated) from the transmitted radio signal. The LNB obtains requested channel information from the satellite dish and sends it back using the same wireless transmission method. Referring to the TCPI/IP network Model, MAC address technology identifies each signal (digital receiver) request so the exact digital receiver gets its required channel information. As claimed, the system comprises: an LNB integrated with a wireless transceiver or unit, replacing coaxial cable, e.g. via an antenna; provision of an electricity connection to the LNB so it gets its power supply from a direct source; and an Ethernet console added to the LNB to enable wireless features configurations.

Description

Wireless LNB Dcscriptioii The invention is related to the existing satellite digital receiver system where the receiver and Low Noise Block down converter (LNB) are wire connected to each other with a coaxial cable type to send and receive signals.
The digital receiver sends a request for the desired channel to the LNB through the cable. After processing the LNB sends back the channel information.
LNB mainly gets its satellite channel from a directed satellite dish, LNB also gets is electricity from the receiver through the coaxial cable, 12 volt for horizontal frequencies and 18 volt for vertical frequencies.
The receiver system mainly consists of the following * Dish * LNB unit * A Digital Satellite Receiver * Wired Link: The Coaxial Cable The invention is an integration and modification of the [NB Wireless LNB (Figure 1).
Receives signals from the satellite dish and wirelessly transmits them to the digital receiver, replacing the existing coaxial cable connection.
Previous art The modern LNB: Low Noise Block-down converter (so called because it converts a whole band or "block" of frequencies to a lower baild).
An LNB sits on the end of an ann and faces the parabolic reflector ("dish") which focusses the signals from a satellite 24,000 miles away into the "feed horn' of the LNB. The LNB converts the signals to a lower frequency and sends them out to the cable connector, which you connect to your satellite receiver via coaxial cable.
A modern "universal" LNB is able to operate in four modes to provide signals from four frequency bands, known as "low-horizontal", "high-horizontal", "low-vertical" and "high-vertical". An LNB may have more than one output but any one output can provide only ONE of these bands at a time.
In order to tell the LIMB output which of the four frequency bands it needs to provide, tile receiver "communicates" with the LNB as follows A modern "Universal" LNB requires a 22 kHz signal at 0.5v p-p to switch its Local Oscillator to 10.6 0Hz ("high band"). Otherwise it uses its 9.75 0Hz oscillator.
Polarisation switching is controlled by DC voltage supplied by the receiver. l2.5v to 1 4.Sv gives vertical and 15.5 to I 8v gives horizontal polarisation.
A higher voltage than that can damage the LNB. A voltage that is too low will prevent the LNB from working correctly.
Under normal circumstances, one cable can cany only one LNB feed (because of the voltage and tone communication method), although it is sometimes possible to use a "stacker DE-stacker" to carry two.
Media Access Control address (MAC address) A unique identifier assigned to network interfaces for communications on the physical network segment.
MAC addresses are used for numerous network technologies and most IEEE 802 network technologies, including Ethernet. Logically, MAC addresses are used in the Media Access Control protocol sub-layer of the OSI reference model.
MAC addresses are most often assigned by the manufacturer of a network interface card (NIC) and are stored in its hardware, the card's read-only memory, or some other firmware mechanism. If assigned by the manufacturer, a MAC address usually encodes the manufacturer's registered identification number and may be referred to as the burned-in address. It may also be known as an Ethernet hardware address (EHA), hardware address or physical address. A network node may have multiple NICs and will then have one unique MAC address per NIC.
MAC addresses are formed according to the rules of one of three numbering name spaces managed by the Institute of Electrical and Electronics Engineers (IEEE).
New Additions and Modifications Wireless LNB (Figure 1).
Device has a newly added wireless unit plus power components and an Ethernet console port.
Figure (1) demonstrates the wireless LNB 1 with antenna 15, an antenna port 16, power connection 11 & 23 and console port 19 The wireless unit is the main addition to the LNB, The overall communication process Figure 3 starts with a channel request made by the end user through the digital receiver 18; the requested channel is then sent to a wireless terminal 17 encapsulated with MAC address and then modulated with the adjusted radio channel for wireless transmission using the WLAN standard IEEE 802.11.
At the. [NB side I, with the same adjusted radio channel the wireless signal is received, Requested channel will then be separated (demodulated) from tile transmitted radio signal; [NB feed horn gets the requested channel frequency from the satellite dish and sends it back using the same wireless transmission method received.
Looking at a scenario where more than one receiver is connecting to one LNB.
Taking advantage of MAC address features to enable the LNB to identify each digital receiver.
Refening to the TCP/IP network Model, MAC address technology is used to identify each. signal. (Digital Receiver) request so the exact digital receiver gets its required channel information.
Figure (2) illustrates the internal components of the wireless LNB.
An integrated circuit 10, acts as a controls unit for the wireless LNB and performs several functions.
The integrated circuit 10 will mainly consist of the following units...
o Flash memory, o EEPROM, o Baseband processor, o FIFO (first in First out controller), o MAC interface internal memory o Ethernet console configuration interface o Channel frequency bands out/in control interface * Power unit 11 provides the LNB with appropriate electricity voltage.
* Channel controller 22 provides the oscillators controller 5 with appropriate electricity voltage in order to allow the oscillators 8 & 9 to differentiate between vertical or horizontal channel frequency 2 & 3 requested by the digital receiver.
* LNB feed born 24 consists of the vertical and horizontal channel frequency bands 2 & 3.
* LINB receives the input signal (channel request) and sends it back to be propagated through antenna 15.
* MAC controller 12 has been added to guarantee communication with the right digital receiver.
* Transceiver unit 13 sends and receives signals throughout the transformer 14 throughout antenna 15.
* A bidirectional antenna 15 is fixed to send and receive the signals.
* Wideband analog baseband chip, DAC/ADC Digital to Analog Converter / Analog to Digital Converter process the signal conversion 13.
* Wideband RF front-end chip 21.
* Ethernet console port 19 enables configuration of the wireless unit features an auxiliary port or the console port is provided to ellable configuring the ireless access technical features such as o The Radio communication channel, o Wireless Network Name (SSID).
o MAC addresses control, o security access controL o Transmit Power, o Advanced Data Rate Contro' Settings, o Wireless Quality of services.
Referring to (Figure 2) The satellite signals first go through a band pass filter 4 which ollly allows the intended band of microwave frequencies to pass through. The signals are then amplified by a Low Noise Amplifier 25 and thence to the Mixer 6. At the Mixer all that has come through the band pass filter and amplifier stage is severely scrambled up by a powerful local oscillator signal 8 &9 to generate a wide range of distorted output signals. These include additions, subtractions and multiples of the wanted input signals and the local oscillator frequency.
Amongst the mixer output products are the difference frequencies between the wanted input signal and the local oscillator frequencies. These are the ones of interest. The second band pass filter 26 selects these and feeds them to the output L band amplifier (not shown), Typically the output frequency = input frequency -local oscillator frequency. In some cases it is the other way round so that the output frequency = local oscillator frequency -input frequency. In this case the output spectrum is inverted.
Advantages * Increase the number of recipients and users easily.
* Facilitate the reception of the wireless signals to serve government departments. Such as navy, marine ports and airport control towers.
* The possibility of receiving signal channels in a moving car if an appropriate broadcast transmission station was set up.
* Maintain safe LNBs and receivers from fires that might occur as a result of electric detonators.
* Maintain safe devices from electric shocks as a result of lightning strikes during the broadcast.
* No need to extend wires for long distances.
* No need to make holes in any wall to pass the wire (cable).
* Enhances and maintains the decorative appearance of homes and offices from the route of many wires.

Claims (4)

  1. SClaims 1, The LNB is integrated with a wireless transceiver to seild and receive signals replacing the coaxial cable.
  2. 2. LINB is integrated with a wireless unit to control wireless traffic to and from the digital receiver.
  3. 3. Anteima is added to the LNB to enable radio signal receive and transmission
  4. 4. The LIMB has been provided with an electricity connection so the LNB gets its power supply from direct source.s. Ethernet console added to the LNB to enable wireless features configurations.
GB1219635.8A 2012-11-01 2012-11-01 Wireless low noise block down converter (LNB) Withdrawn GB2507519A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1219635.8A GB2507519A (en) 2012-11-01 2012-11-01 Wireless low noise block down converter (LNB)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1219635.8A GB2507519A (en) 2012-11-01 2012-11-01 Wireless low noise block down converter (LNB)

Publications (2)

Publication Number Publication Date
GB201219635D0 GB201219635D0 (en) 2012-12-12
GB2507519A true GB2507519A (en) 2014-05-07

Family

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Family Applications (1)

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GB1219635.8A Withdrawn GB2507519A (en) 2012-11-01 2012-11-01 Wireless low noise block down converter (LNB)

Country Status (1)

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GB (1) GB2507519A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29607742U1 (en) * 1996-04-29 1996-07-25 Wohlmeiner Dietmar Radio operated satellite reception system
US20040110468A1 (en) * 2002-12-10 2004-06-10 Perlman Stephen G. Wireless network with presentation and media layers for broadcast satellite and cable services
US20060262222A1 (en) * 2003-04-17 2006-11-23 Raoul Monnier Converter and method for converting digital signals received in the form of modulated multiplexed signals
US20080060024A1 (en) * 2006-08-31 2008-03-06 Bart Decanne Wirelessly transmitting programming obtained from a satellite system
EP2525572A1 (en) * 2011-05-19 2012-11-21 Maxlinear, Inc. System and method in a broadband receiver for efficiently receiving and processing signals

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29607742U1 (en) * 1996-04-29 1996-07-25 Wohlmeiner Dietmar Radio operated satellite reception system
US20040110468A1 (en) * 2002-12-10 2004-06-10 Perlman Stephen G. Wireless network with presentation and media layers for broadcast satellite and cable services
US20060262222A1 (en) * 2003-04-17 2006-11-23 Raoul Monnier Converter and method for converting digital signals received in the form of modulated multiplexed signals
US20080060024A1 (en) * 2006-08-31 2008-03-06 Bart Decanne Wirelessly transmitting programming obtained from a satellite system
EP2525572A1 (en) * 2011-05-19 2012-11-21 Maxlinear, Inc. System and method in a broadband receiver for efficiently receiving and processing signals

Also Published As

Publication number Publication date
GB201219635D0 (en) 2012-12-12

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