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Uplink and downlink are frequencies

Communication from earth station to satellite in uplink and communication from satellite to earth station is downlink

Always uplink freq.>downlink freq.

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uplink frequency-1710-1785MHz

downlink frequency-1805-1880

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In the sense of a mobile communication:

Downlink frequency is that used by a base station to communicate with the Mobile.

In satellite communication also the same theory exists

downlink is the return path.

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Uplink --> 890 MHz - 915 MHz

Downlink --> 935 MHz - 960 MHz

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Various sites online offer Downlink music and sounds for download, including mp3bear, the piratebay, junodownload, and iTunes. The prices vary, as do the legality of the sites, so customers need to take care to not pirate Downlink's music.

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Uplink is from MS to BS

Downlink is from BS to MS

P.S: BS=Base Station, MS=Mobile Station e.g cell phone

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High Speed Downlink Packet Access

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The downlink is greater than the uplink on most internet connects due to overall demand for bandwidth. Downloading takes up a majority of internet usage and connections are optimized for it.

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Duplex distance/spacing is the distance between the uplink and downlink frequencies

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  • Worldwide downlink for voice - 145.80
  • Worldwide packet uplink/downlink - 145.825
  • Region 1 voice uplink - 145.20
  • Region 2 and 3 voice uplink - 144.49
  • Worldwide uplink for cross band voice repeater - 437.80
  • Worldwide SSTV downlink - 145.800

For more information, visit the NASA ISS Amateur Radio page at http://spaceflight.nasa.gov/station/reference/radio/

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downlink becouse frequncy / power low compare to uplink

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The downlink frequency for communication with satellites to Earth can vary depending on the specific satellite and its communication system. Frequencies typically used for satellite downlink to Earth are in the range of UHF (Ultra High Frequency) to Ka-band. The exact frequency used will depend on factors such as satellite design, mission requirements, and regulations.

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Uplink translates also to Upload - where you send data to another destination. Like when you want your data to be acessed by any other person you upload that thing and data rate of uploading is called as uploading speed.

Downlink translates to Download - where you receive data from another destination. meant that when you want to acess any data from any source and data transfer rate from downlink is also known as downloading speed

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This is actually the EGSM uplink band. It carries signals "up" from the mobile station to the base station. EGSM downlink is from 925MHz to 960MHz and carries signals from the base station "down" to the mobile station.

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full form of HSDPA is High-Speed Downlink Protocol Access

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High Speed Downlink Packet Access - it's a data transfer protocol for mobile phones.

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Most two-way radios are 'duplex' transceivers. This means they transmit (uplink)on one frequency and receive (downlink) on another- spaced at least 13 MHz apart. This stops interference between the radio's components.

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Hi, For every GSM band there are Uplink and downlink frequencies. Example: GSM 900 TX: 880 MHz to 915 MHz is an uplink frequency range GSM 900 RX: 925 MHz to 960 MHz is a downlink frequency range Aloha, Maverick

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Uplink frequency is a frequency that goes from the ground to the satellite. Downlink frequency goes from the satellite to the ground.

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In the CDMA technology It is either between your Handset and the Mobile Station. The dedicated frequency are allocated for u sending your data to the mobile station (Uplink freuency) and a dedicated frequency is reserved for you to receive your data from the mobile station (Downlink frequency)

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  • Live on Fox movies TV
  • Satellite : Nilesat 104, Downlink Frequency : 11296, FEC : ¾, Polarization : Horizontal, Symbol Rate : 27500 Msps
  • Satellite : Arabsat Badr 4, Downlink Frequency : 11843, Polarization : H, FEC : ¾, Symbol Rate : 27500 Msp.

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It varies - according to which system is in use. The related link to Wikipedia lists the uplink & downlink frequencies.

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For communication satellites the range is much higher than that of communication relay. Communication Satellite can cover up to several thousands of kilometers.

For communication relay, the uplink and the downlink frequency is the same. But for communication satellites the uplink and the downlink frequencies are different in order to avoid interference.

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High Speed Downlink Shared Channel or H.S.-D.S.CH. is a transport layer channel added to the High Speed Downlink PacketÊAccess (H.S.-D.P.A.) to enhance third generation (3G) mobile telephony communications. This allows networks based on Universal Mobile Telecommunications System (U.M.T.S.) to have higher date speeds and capacity.

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Yes, Nokia N82 has 3G capabilities usig HSDPA (High Speed Downlink Packet Access) technology

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So that they can both be used at the same time (i.e. full duplex) without interference.

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Graham Michael Weaver has written:

'Dual antenna studies of microwave scintillations on a satellite downlink'

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There is no specific person. Skrillex, Excision, Downlink, Datsik, SKisM, there are many people. Dubstep originated from grungy garage and experimental reggae.

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due to path loss : higher is the frequency higher is the patrh loss

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Chi-Hang Fred Fung has written:

'Precoding for the multi-antenna multi-user downlink'

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Douglas J. Mudgway has written:

'Uplink-downlink' -- subject(s): Deep space network, History

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Really fast.

ANS 2 - Global Hawk operates on satellite downlink so information transfer is near real time.

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You would need to know the LO frequency from the satellite.

Ex- C-band is 2200Mhz

If you UL is 6.0GHz you DL would be 3.8GHz

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High Speed Downlink Packet Access (HSDPA) is a packet based technology for W-CDMA downlink with data transmission rates of 4 to 5 times that of current generation 3G networks (UMTS) and 15 times faster than GPRS. The latest release boosts downlink speeds from the current end-user rate of 384 kbps (up to 2 Mbps according to standards) to a maximum value according to standards of 14.4 Mbps. Real life end-user speeds will be in the range of 2 to 3 Mbps.

ASHOK KUMAR SINGH

MBA I-SEM

NBA SCHOOL OF BUSINESS

NEW DELHI

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A:

Uplink translates also to Upload - where you send data to another destination. Like when you want your data to be acessed by any other person you upload that thing and data rate of uploading is called as uploading speed.

Downlink translates to Download - where you receive data from another destination. meant that when you want to acess any data from any source and data transfer rate from downlink is also known as downloading speed.

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Tetra communication systems typically operate within the frequency range of 380-400 MHz for uplink and 390-410 MHz for downlink transmissions.

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The satellite transponder typically works in either the C-band (4-8GHz) or the Ku-band (12-18GHz) and these are for the downlink (from the satellite to the earth station).

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It is because a mobile is operated on a battery with low power and therefore it sends signals on low(uplink) frequencies whereas a base station is driven by high power and can easily send signals on high(downlink) frequencies. This can be verified by Friis equation which says Transmitted power and Transmitted frequency are directly proportional.

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Broadcast Control Channel (BCCH)

-

DOWNLINK

- This channel contains system parameters needed to identify the network and gain access. These paramters include the Location Area Code (LAC), the Mobile Network Code (MNC), the frequencies of neighboring cells, and access parameters.

Frequency Correction Channel (FCCH)

-

DOWNLINK

- This channel is used by the MS as a frequency reference. This channel contains frequency correction bursts.

Synchronization Channel (SCH)

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DOWNLINK

- This channel is used by the MS to learn the Base Station Information Code (BSIC) as well as the TDMA frame number (FN). This lets the MS know what TDMA frame they are on within the hyperframe.

* The BSIC was covered in the Introduction to GSM Tutorial. You can also read about the numbering schemes used in GSM.

Cell Broadcast Channel (CBCH)

-

DOWNLINK

- This channel is not truly its own type of logical channel. The CBCH is for

point-to-omnipoint

messages. It is used to broadcast specific information to network subscribers; such as weather, traffic, sports, stocks, etc. Messages can be of any nature depending on what service is provided. Messages are normally public service type messages or announcements. The CBCH isnt allocated a slot for itself, it is assigned to an SDCCH. It only occurs on the downlink. The CBCH usually occupies the second subslot of the SDCCH. The mobile will not acknowledge any of the messages.

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HSDPA stands for High-Speed Downlink Packet Access. It is an enhanced form of the mobile communications protocol 3G. It is often called 3G+, 3.5G or turbo 3G.

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It is an electronic device on board a geostat satellite to receive uplink data and picture bits,amplifying it before converting it to a downlink freqency bit stream and sending it down to earth.

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routers basicaly has 2 ports, one is uplink and 1 is downlink, is any1 is not assigned , anyone can be assisgned for connecting to the switch

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UMTS is the 3rd generation wireless technology while HSDPA (High Speed Downlink Packet Access) is the feature of UMTS technology where users can download a stream of 14.4 Mbps with HSDPA.

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here is the satellite & frequency details of Bhaarath TV ================================================================

SATELLITE: Insat 2E at 83°E

DOWNLINK FREQ: 4042

POLARISATION : Vertical

SYMBOL RATE: 8000

FEC: 7/8

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