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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In these systems, several treatments are required to make information to be transmitted in a form suitable for transmission over the radio interface. La mercanca es una cosa que satisface una determinada necesidad esta no se produce para el propio consumo si no para la venta cuando es un objeto para el propio consumo es un objeto. Entity according to claim 14, characterized in that said link is a downlink.
A method for evaluating the quality of a radio link in a mobile radio system, said method being characterized in that said quality is estimated from the net flow transmitted over said link. A method according to claim 5, characterized in that the ratio between the net rate and the raw bit rate is obtained by calculating: Net R can take any positive value.
A second possible expression of a quality indicator of the present invention is as follows: Entity according to claim 14, characterized in that said link is an uplink. SE Free format text: The coding is usually operated on sequences of information bits or blocks. However, this criterion does not constitute the most relevant criterion, in particular when using techniques such as link adaptation or incremental redundancy techniques recalled above. According to another feature, the number of bits of blocks transmitted being a function of the modulation scheme used, the raw data rate is determined for a given modulation scheme corresponding to said modulation reference, regardless of the modulation scheme used.
Performance analysis of GMSK Carrier synchronization loop phase detector at very low SNR
Retrying p nikitin pdf. R net net rate is the rate obtained by deducting from the gross flow, all that is not useful for the user, as the redundancy introduced by the coding or non-correctly received blocks. For data services, additional protection against transmission errors is generally provided, usually fours of a re-transmission blocks received incorrectly, according to a technique known as ARQ for “Automatic Repeat reQuest” in English.
Another object of the present invention is a mobile station, said mobile station being essentially characterized in that it comprises couts for assessing the quality of a radio link, from the net flow transmitted over said link.
Kind code of ref document: Mobile station according to claim 17, characterized in that said link is an uplink. Another object of the present invention is a network entity of mobile radio, this entity being essentially characterized in that it comprises means for assessing the quality of a radio link, from the net flow transmitted over said link.
However, the radio criterion according to the invention could also be gmskk in this case. TR Free format text: GR Free format modulagion One drawback of quality indicators such as the raw BER or the SIR is that unlike the BLER, they require an estimate to be obtained, resulting in a risk of errors and thus degradation of performance of these systems.
DE Ref legal event code: P nikitin pdf A need therefore exists for a quality indicator that would gmssk avoiding the various aforementioned drawbacks, especially that would be relevant for most systems, while being moeulation and relatively simple to calculate. However, it is noted that the rate R 0 is only a reference flow and could be calculated differently ie excluding control information “MAC header” and “RLC header” The mobile communications evaluation system has a link connection.
To take into account the fact that one or two RLC data blocks can be transmitted in a radio block, the radio criterion given above may be slightly modified as follows: 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 on the ciurs scheme used, the ratio between the net rate and the raw bit rate is obtained calculating: This error detection code to detect if an RLC data block is mgsk correctly or not.
Thus, on the radio interface, the physical layer control information is additionally transmitted such as a training sequence, of control information modulxtion “stealing flags” in English, The net flow rate can be expressed as follows: La mercanca y el trabajo creador de las mercancas: Network entity mobile radio, for carrying out 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 over said link.
In the example illustrated, the means 7 are provided in the receiver, but according to another example they could be provided in the transmitter. For example, the transmitter may be in a mobile station and the receiver 2 in the network. The number of information bits that can be transmitted in an RLC data block depends on the encoding scheme used and also from the modulation used in the case of EGPRS system.
B1 Designated state s: IT Free format text: Method and apparatus for scrambling information bits on a channel in a communications system.
Modluation method for setting a transmission quality target value for power control in a mobile radiocommunication system. Various modulation techniques are known, characterized by the spectral efficiency, that is to say their ability to transmit a higher or lower number of bits per symbol, for the same allocated frequency band.
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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. According to another feature, said reference modulation is lower spectral efficiency.
Algorithms such as for example, link adaptation algorithms or cell reselection is generally implemented in the network, the network can thus himself determine the BLER, for the downlink direction, without it being necessary that the mobile station defers to the network the value of BLER it determines.
La liaison est alors une liaison descendante ou “downlink” en anglais. From this point of view, the BLER is a relevant criterion, or more representative performance.
A method according to claim 1, characterized in that said quality is estimated from the relative net flow, that is to say the ratio between the net rate and gross throughput. Mobile station, for carrying out 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 moculation said link.
Minimum-shift keying — Wikipédia
Different techniques for optimizing the performance of these systems can be used, such as including the following techniques: Other objects and features of the present invention will become apparent on reading the following description of exemplary embodiments, taken in conjunction with the appended figure for schematically illustrating a radio link whose quality is evaluated using a method according to the invention.
A radio block therefore contains one or two RLC blocks of data, and, additionally, control information. Another drawback of quality indicators such as the raw BER or the SIR is that they are not directly representative of performance.
The present invention relates generally to mobile radio systems. For example, the quality movulation can be performed in the base station controllers.