A method in a first base station for calculating a first location parameter (α) of a user equipment in order to improve beamforming accuracy within a Coordinated Multiple Point "CoMP" communication system, which communication system comprises the first base station, the user equipment and a second base station, the method comprising: measuring a signal received from the user equipment, determining a first estimate (α') of the first location parameter, based on the measured signal, obtaining a second estimate (α") of the first location parameter, based on a second location parameter (β) of the user equipment, estimated at the second base station, calculating the first location parameter (α), based on the first estimate (α') of the first location parameter and the obtained second estimate (α") of the first location parameter, determining a first weight coefficient (a), associated with the first base station, based on the measured first signal from the user equipment, obtaining a second weight coefficient (b), associated with the second base station, and wherein the step of calculating the first location parameter (α), comprises multiplying the first weight coefficient (a) with the first estimate (α') of the first location parameter, multiplying the second weight coefficient (b) with the second estimate (α") of the first location parameter, and adding the two multiplication results such that: α = a ⋅ α ' + b ⋅ α ", wherein the step of determining the first weight coefficient (a) is performed based on the measured first signal, received from the user equipment according to any of the following rules: received signal to noise ratio of uplink sounding reference signals, uplink timing advance, estimation of path loss, characterized in that the sum of the first weight coefficient (a) and the second weight coefficient (b) is 1 and the relation between the first and second weight coefficients (a, b) is such that a higher received signal to noise ratio, shorter uplink timing advance and/or lower path loss render a higher weight coefficient (a, b) and a lower received signal to noise ratio, longer uplink timing advance and/or higher path loss render a lower weight coefficient (a, b). measuring a signal received from the user equipment, determining a first estimate (α') of the first location parameter, based on the measured signal, obtaining a second estimate (α") of the first location parameter, based on a second location parameter (β) of the user equipment, estimated at the second base station, calculating the first location parameter (α), based on the first estimate (α') of the first location parameter and the obtained second estimate (α") of the first location parameter, determining a first weight coefficient (a), associated with the first base station, based on the measured first signal from the user equipment, obtaining a second weight coefficient (b), associated with the second base station, and wherein the step of calculating the first location parameter (α), comprises multiplying the first weight coefficient (a) with the first estimate (α') of the first location parameter, multiplying the second weight coefficient (b) with the second estimate (α") of the first location parameter, and adding the two multiplication results such that: α = a ⋅ α ' + b ⋅ α ", wherein the step of determining the first weight coefficient (a) is performed based on the measured first signal, received from the user equipment according to any of the following rules: received signal to noise ratio of uplink sounding reference signals, uplink timing advance, estimation of path loss, characterized in that the sum of the first weight coefficient (a) and the second weight coefficient (b) is 1 and the relation between the first and second weight coefficients (a, b) is such that a higher received signal to noise ratio, shorter uplink timing advance and/or lower path loss render a higher weight coefficient (a, b) and a lower received signal to noise ratio, longer uplink timing advance and/or higher path loss render a lower weight coefficient (a, b).