Abstract: Methods and arrangements (600) in a network node (110), for scrambling a timing advance value, to be received by a mobile station (120). The method comprises receiving (501) a signal from the mobile station (120), estimating (504) the timing advance value for the mobile station (120), determining (505) an offset value to be added to the estimated timing advance value, computing (506) a scrambled timing advance value by adding the determined offset value to the estimated timing advance value, and transmitting (507) the scrambled timing advance value, to be received by the mobile station (120). Also, methods and arrangements (800) in a mobile station (120), and methods and arrangements (1000) in a database (140) are disclosed.

Abstract: Methods and arrangements (600) in a network node (110), for scrambling a timing advance value, to be received by a mobile station (120). The method comprises receiving (501) a signal from the mobile station (120), estimating (504) the timing advance value for the mobile station (120), determining (505) an offset value to be added to the estimated timing advance value, computing (506) a scrambled timing advance value by adding the determined offset value to the estimated timing advance value, and transmitting (507) the scrambled timing advance value, to be received by the mobile station (120). Also, methods and arrangements (800) in a mobile station (120), and methods and arrangements (1000) in a database (140) are disclosed.

Abstract: The present invention relates to an analog predistorter (100) having a tunable amplitude (60) and/or phase (80) expansion. The predistorter (100) includes a coupler (110) having an input port (112), an output port (114), a first (116) and a second (118) coupled port separated by 90 degrees. A first compensation circuit (120A) is connected to the first coupled port (116) and comprises a first combination (130A) of linear (132A) and nonlinear (131A) circuit elements and a first impedance adjusting unit (140A) for adjusting the impedance seen by the nonlinear circuit element (131A). A second compensation circuit (120B) is connected to the second coupled port (118) and comprises a second combination (130B) of linear (132B) and nonlinear (131B) circuit elements a second impedance adjusting unit (140B) for adjusting the impedance seen by said nonlinear circuit element (131B).

Abstract: The present invention relates to an analog predistorter (100) having a tunable amplitude (60) and/or phase (80) expansion. The predistorter (100) includes a coupler (110) having an input port (112), an output port (114), a first (116) and a second (118) coupled port separated by 90 degrees. A first compensation circuit (120A) is connected to the first coupled port (116) and comprises a first combination (130A) of linear (132A) and nonlinear (131A) circuit elements and a first impedance adjusting unit (140A) for adjusting the impedance seen by the nonlinear circuit element (131A). A second compensation circuit (120B) is connected to the second coupled port (118) and comprises a second combination (130B) of linear (132B) and nonlinear (131B) circuit elements a second impedance adjusting unit (140B) for adjusting the impedance seen by said nonlinear circuit element (131B).

Abstract: A base station, as is conventional, directs mobile stations within its cell to make measurements on channels used by neighbouring cells. The base station also directs the mobile stations to make measurements on an additional channel not used by a neighbouring cell. The additional channel is changed regularly. Measurements made on the additional channel are useful when assessing the potential impact of changes to the frequency reuse plan.

Abstract: A method and device for measuring the return loss of a radiofrequency signal at a feeding circuit coupled to a load, wherein the forward power and the reflected power are sensed by a measuring circuit having first and second branches (11, 12) for transferring a derived forward signal and a derived reflected signal, respectively. The return loss is calculated on the basis of the sensed power levels (P1, P2) of the derived signals in the first and second branches. The sensing range of power levels (P2) to be sensed in one branch (12) is adjusted in response to the sensed power level (P1) in the other branch (11), whereby the dynamic range required for power sensing in the measuring circuit is reduced.