Abstract: A method for transmitting from a multi-antenna station and a multi-antenna station is provided. The station is provided with a reference antenna and a diversity antenna. During the operation of the method, one of the antennae is selected to be stronger in the event of power unbalance between the diversity and reference antennae. Greater transmission power is assigned for the diversity antenna than the reference antenna when the diversity antenna is only phase adjusted. Greater transmission power is assigned for the reference antenna than the diversity antenna when the reference antenna is amplitude adjusted.

Abstract: The present invention presents a method and apparatus for phase hopping and space-time coding signals for transmission on multiple antennas. The method and apparatus provides expansion of a N×N′ space time block code to a M×M′ space time block code, where M>N, by using phase hopping on the symbols within the N×N′ space time block code to allow transmission of the space time block code on a number of diversity antennas greater than N′. A result of M antenna diversity may be achieved for M transmit antennas.

Abstract: Equipment for transmitting a signal, the equipment comprising an antenna array (600-606) for providing three or more radiation antenna patterns. The equipment is arranged to transmit a primary common pilot signal with at most two radiation patterns and a secondary common pilot signal with at least one radiation pattern. The equipment comprises controllers (622a-622d) for adjusting the power ratio between the primary and the secondary common pilot signal and the total power of the primary and the secondary common pilot signals, and controllers (614a-614d) for adjusting the transmit power of the dedicated pilot signal, such that the power levels of the dedicated pilot signals transmitted with the same radiation patterns as the secondary common pilot signal are relatively higher than the power levels of the dedicated pilot signals transmitted with the same radiation patterns as the primary common pilots.

Abstract: This invention relates to a method for use in a communication system comprising at least one transmitter and at least one receiver, said at least one transmitter comprising a plurality of transmitting antennas, said method comprising the steps of transmitting from at least one but not all of said transmitting antennas a reference signal on a respective first channel; transmitting data from said transmitting antennas on respective second channels, wherein the second channels transmitted by said at least one but not all transmitting antennas are supported by the respective first channel and the second channels transmitted by the other of said transmitting antennas are supported by a reference signal provided in the respective second channel.

Abstract: The present invention presents a method and apparatus for phase hopping and space-time coding signals for transmission on multiple antennas. The method and apparatus provides expansion of a N×N′ space time block code to a M×M′ space time block code, where M>N, by using phase hopping on the symbols within the N×N′ space time block code to allow transmission of the space time block code on a number of diversity antennas greater than N′. A result of M antenna diversity may be achieved for M transmit antennas.