Antenna arrangement for transmitting reference signals

An antenna arrangement, the antenna arrangement comprising:

• a first antenna array;
• and
• a second antenna array, wherein
• the first antenna array comprises antenna elements of a first polarization and antenna elements of a second polarization,
• the second antenna array comprises antenna elements of the first polarization and antenna elements of the second polarization,
• the two antenna arrays are arranged to collectively be fed four signals, such that the antenna elements of each polarization at each antenna array is fed a respective one out of the four signals, and
• the signal as fed to the antenna elements of the second polarization of the second antenna array is phase shifted 180° with respect to at least one of the other signals as fed to the other antenna elements.