Signaling of sequence generator initialization parameters for uplink reference signal generation

    公开(公告)号:AU2013240601A1

    公开(公告)日:2014-10-16

    申请号:AU2013240601

    申请日:2013-03-28

    Abstract: A base station initializes pseudo-random sequence generators on which wireless devices base generation of uplink reference signals. The base station determines (100) a first sequence from a first subset of possible initialization sequences for a sequence generator of a first device, and determines (110) a second sequence from a second subset of possible initialization sequences for a sequence generator of a second device. The range of this second subset spans at least the range of the first subset. The base station further encode (120) the first sequence as a first set of two or more parameters, and encodes (130) the second sequence as a second set of one or more parameters. This second set includes at least one parameter not included in the first set, and comprises fewer bits than the first set. The base station initializes (140) the sequence generators by transmitting the first and second sets of parameters to the devices.

    METHOD AND LOCALIZATION UNIT FOR DETECTING AND LOCATING LOAD COILS IN A TRANSMISSION LINE

    公开(公告)号:CA2688059A1

    公开(公告)日:2010-06-18

    申请号:CA2688059

    申请日:2009-12-03

    Abstract: A method and localization unit for localizing load coils within a transmission line. The load coil localization is achieved using a measurement of a Single-Ended Line Testing (SELT) parameter for the transmission line and an approximation of the SELT parameter obtained from a model of the transmission line. The model is based on a parameter vector &thetas; including parameters describing the transmission properties of each load coil and cable section and the length of a plurality of individual cable sections as unknown independent parameters. The location of at least one load coil is determined by substantially minimizing a criterion function that represents a deviation between the measurement of the SELT parameter and the approximation of the SELT parameter obtained from the model. The load coil localization method and unit can be used for both symmetric and asymmetric transmission lines.

    24.
    发明专利
    未知

    公开(公告)号:BRPI0520629A2

    公开(公告)日:2009-05-19

    申请号:BRPI0520629

    申请日:2005-10-27

    Abstract: A method and device for estimating one or more transmission properties of a telecommunication transmission line. At least one signal is sent on the line, the at least one signal including at least two frequencies for which the absolute value of the line propagation constant times the line length is less than &pgr;, and a resulting signal is received. An estimate of at least one transmission line property is then determined by examining the relationship between the sent and resulting signal or signals. The process may be repeated, if necessary. The estimate determination may also be repeated one or more times, with each successive estimate preferably using for the determination only those frequencies for which, as previously estimated, the absolute value of the line propagation constant times the line length is less than &pgr;.

    25.
    发明专利
    未知

    公开(公告)号:AT384395T

    公开(公告)日:2008-02-15

    申请号:AT04717331

    申请日:2004-03-04

    Abstract: The length and attenuation of a signal line between a transmitter and a customer premises equipment is to be estimated. A frequency dependent line input impedance (Z in (f)) as seen from the transmitter, is measured and an absolute impedance value (oe Z in (f) oe), is generated. The latter is shown as a curve (A1) in the diagram with the frequency (f) on the abscissa and the impedance (oe Z in (f) oe) on the ordinate. Extreme values (Max. 1 , Max 2 , Max 3 ; Min 1 , Min 2 , Min 3 ) arc denoted and a frequency distance (FD 1 -FD 4 ) between two consecutive of the extreme values is generated. The line length (L) is generated as L=½.vop/FD 1 , in which vop is the velocity of propagation of a signal on the line. The attenuation is estimated by multiplying the line length with an average attenuation value for the actual line type. The advantages are that the line length can be estimated with good accuracy in a simple manner for short lines and that the line attenuation is estimated in a simple manner.

    Method and arrangement for estimation of line properties

    公开(公告)号:AU2004236618A1

    公开(公告)日:2004-11-18

    申请号:AU2004236618

    申请日:2004-05-11

    Abstract: The length and attenuation of a signal line between a transmitter and a customer premises equipment is to be estimated. A frequency dependent line input impedance (Z in (f)) as seen from the transmitter, is measured and an absolute impedance value (oe Z in (f) oe), is generated. The latter is shown as a curve (A1) in the diagram with the frequency (f) on the abscissa and the impedance (oe Z in (f) oe) on the ordinate. Extreme values (Max. 1 , Max 2 , Max 3 ; Min 1 , Min 2 , Min 3 ) arc denoted and a frequency distance (FD 1 -FD 4 ) between two consecutive of the extreme values is generated. The line length (L) is generated as L=½.vop/FD 1 , in which vop is the velocity of propagation of a signal on the line. The attenuation is estimated by multiplying the line length with an average attenuation value for the actual line type. The advantages are that the line length can be estimated with good accuracy in a simple manner for short lines and that the line attenuation is estimated in a simple manner.

Patent Agency Ranking