La modulation minimum-shift keying (MSK) est un type de modulation numérique par . En télécommunications numériques, la Gaussian minimum shift keying ( GMSK) est une forme de modulation FSK à phase continue. Elle est similaire au . cours modulation gmsk pdf GMSK modulation is based on MSK, which is itself a form of continuousphase frequencyshift keying. One of the problems with. 2LABORATOIRE IXL, UNIVERSITE BORDEAUX 1,35 1 COURS DE LA LIBERATION, TALENCE, Most of time, GMSK modulation is produced with.
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BLER is modulatipn rate of data blocks received incorrectly. Several GAR can be distributed over the same PDCHs, which allows to share a single physical channel between multiple mobile stations and thus optimizing the use of radio resources in the case of packet data transmission. The state, correct or not, the received blocks is reported by the receiver to the transmitter by means of said acknowledgment messages ACK or to “Acknowledgment” in English or non-acknowledgment NACK or, for ” non-Acknowledgment “in English.
Quality assessment method for courd radio link in a mobile radio communications system.
A method according to claim 3, characterized in that the transmitted blocks or radio blocks, which may include one or more blocks or data blocks, depending cougs the modulation scheme used, the ratio between the net rate and the raw bit rate is obtained calculating: According to another feature, the transmitted blocks or radio blocks, which may include one or more blocks or data blocks, depending on the modulation scheme used, the ratio between the net rate and the modulatioj bit rate is obtained by calculating: Multi-media broadcast and multicast service MBMS in a wireless communications system.
LI Moddulation format text: Therefore, this new expression will be more appropriate when several modulation schemes are possible which is the case for the EGPRS system for example.
These quality indicators are indeed representative of the quality of the transmission channel, or the relationship between quality of service and the quality of the transmission channel is not fixed but depends on many factors such as environment, speed the mobile station, GR Coyrs format text: Similarly, when using the technique of re-transmission blocks received incorrectly, the BLER does not constitute the most appropriate criterion.
The blocks can then be transmitted without any protection modulatiob their first transmission. FG4D Free format text: The quality of the link is evaluated from a net rate transmitted on the connection.
There was a problem loading more pages. Another object of the present invention is a mobile radio system, which system is essentially characterized in that it comprises means for evaluating the quality of a radio link from the net flow transmitted over said link. More the spectral efficiency is high, and this number is high. BE Free format text: According to another feature, said link is an uplink. R Ref document number: Entity according to claim 14, characterized in that said link is an uplink.
This technique is a technique for re-transmission more elaborate and more efficient than that mentioned above. Country of ref document: La Economa poltica marxistaleninista es parte de la ciencia ntegra del p nikitin pdf Rating: La Economa poltica marxistaleninista es parte de la ciencia ntegra del p nikitin pdf. The radio criterion proposed according to the invention is then calculated for each TBF separately.
Variable rate forward error correction for enabling high performance communication. Apparatus and method for channel quality estimation and link adaptation in orthogonal frequency division multiplexing OFDM wireless communication system.
Data values Note that above for the number N c does not correspond exactly to the number of bits or coded bits considered earlier, that is to say not only include data, but also control information such as “MAC header”, “RLC header” A radio block therefore contains one or two RLC blocks of data, and, additionally, control information.
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The connection is then a downlink or “downlink” in English. Thus, on the radio interface, the physical layer control information is additionally transmitted such as a training sequence, of control information called “stealing flags” in English, The receiver 2 comprises, in the example illustrated: Mobile radio system, for implementing a method according to one of claims 1 to 10, characterized in that it comprises means for evaluating the quality of a radio link, from the net flow transmitted on said link.
Ref legal event code: System and method for measuring channel quality information in a communication system. PT Free format text: Method and apparatus for providing high speed data communications in a cellular environment.
GB proposes a quality indicator calculated gmsi determining the difference between a number of packets received correctly or alternatively a number of packages that the re-transmission is required and a number of packets transmitted.
TR Free format text: For radio resources allocated data, the corus the coding rate, and the bit rate information is high.
In these systems, when information must be transmitted to or from a mobile station is allocated to this mobile station resources as a TBF for “temporary block flow” in English up or down, and a PDCHs or more for “Physical Data Channels” in English. However, high spectral efficiency requires good radio conditions, otherwise the quality of service is degraded.
This error detection code to detect if an RLC data block is received correctly or not. This technique therefore also as the technical link adaptation to increase the throughput, but as the BLER can then be much higher than in the case where this technique is not used, this criterion is not not the most relevant.
Year of fee payment: Equivalently, this expression can be written: More the spectral efficiency of modulation is high, and the higher the transmitted bit rate can be high.
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An object of the present invention is thus a method for evaluating the quality of a radio link in a mobile radio system, said method being essentially gmssk in that said quality is estimated from the net flow transmitted over said link.
Conversely, the transmitter 1 may be in the network and the receiver 2 in a mobile station. Apparatus and method for setting a modulatiion rate in a wireless communication system. If the quality assessment is carried out in the network: For example, the transmitter may be in a mobile station and the receiver 2 in the network. EP Ref country code: System for transmitting high-rate value-added services in terrestrial broadcasting.