By admin No comments

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.

Author: Meztijinn Nakus
Country: Latvia
Language: English (Spanish)
Genre: Politics
Published (Last): 15 December 2011
Pages: 242
PDF File Size: 20.35 Mb
ePub File Size: 19.37 Mb
ISBN: 878-1-98844-911-7
Downloads: 52438
Price: Free* [*Free Regsitration Required]
Uploader: Tukazahn

IT Free format text: R net peut prendre n’importe quelle valeur positive. According to another feature, said quality is assessed from the relative net flow, that is to say the ratio between the net rate and gross throughput. BLER is the rate of data blocks received incorrectly. In systems having a plurality of possible modulation schemes, another possibility is to consider a given modulation scheme corresponding to a given modulation called reference to the raw bit rate, that is to say replacing N i c N c which is the number of bits in a block using the reference modulation e.

The number N i c depends moeulation the modulation scheme applied in the i-th transmitted block.

NL Free format text: Country of ref document: Apparatus and method for channel quality estimation and link adaptation in orthogonal frequency division multiplexing OFDM wireless communication system. Choosing as a reference modulation modulation lower spectral efficiency that is to say for which the number of transmitted bits per symbol is the lowest as the GMSK modulation in the EGPRS system, this latter expression Furthermore, an additional advantage is that it can take into account that the performance is better when a block is received correctly by using a high spectral efficiency modulation that when a block is received correctly by using a low modulation spectral efficiency.

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.

Minimum-shift keying

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. Other objects and features of the present invention will become midulation 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 method for setting a transmission quality target value for power control in a mobile radiocommunication system. A radio block modu,ation contains one or two RLC blocks of data, and, additionally, control information. 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.

Publications – Christophe LAOT

The coding is usually operated on sequences of information bits or blocks. A method according to claim 3, characterized in that the ratio between the net rate and the raw bit rate is obtained by calculating: GR Free format text: Mobile station according to claim 17, characterized in that said link is a downlink.

CH Free format text: FI Free format text: There was a problem loading more pages.

In these systems, when information must be transmitted to or from modulatin 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.

La mercanca es una cosa que satisface una determinada necesidad esta no se produce para el propio consumo si no para la modulatlon cuando es un objeto para el propio consumo es un objeto. BE Free format text: A method according to claim 1, characterized in that the data transmitted over said connection being obtained by encoding bit block of information, the net rate is obtained by calculating: Automated tool method for frequency plan revision within a cellular telephone system.

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.


REF Ref document number: The method and base station system for voice transmission via a radio interface in a digital radio communication system. Miles nahum sarna genesis pdf de libros digitales y ebooks p nikitin pdf Yu. 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. The radio criterion consisting of BLER may be used otherwise.

Minimum-shift keying — Wikipédia

In systems such as eg GPRS and EGPRS systems, the correct or incorrect status of blocks received necessary for the following quality assessment one or other of the above expressions can be obtained as follows.

A1 Designated state s: La Economa poltica marxistaleninista es parte de la ciencia ntegra kodulation p nikitin pdf Rating: CH Ref legal couts code: The connection is then a downlink or “downlink” coure English.

For fours, the transmitter may be in a mobile station and the receiver 2 in the network. Variable rate forward error correction for enabling high performance communication. However, high spectral efficiency requires good radio conditions, otherwise the quality of service is degraded. Retrying p nikitin pdf. 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, modulatlon of the modulation scheme used.

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. The present invention relates generally to mobile radio systems. 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.