Method and transmitter for transmitting data in a multi-carrier system via a number of transmitting antennas

A method of transmitting data by radio, comprising:

• using a plurality of subcarriers of a frequency band and a plurality of antennas for transmission such that each antenna transmits data using the plurality of the subcarriers;
• dividing data for transmission into a plurality of elements such that the number of data elements corresponds to the number of subcarriers;
• for each antenna, assigning each element to a subcarrier for transmission, such that for at least two antennas and at least one subcarrier, different elements are assigned to said one subcarrier;
• and
• before performing an OFDM modulation for each antenna, multiplying each element by an antenna-specific and an element-specific factor.

A method of transmitting data by radio, comprising:

• using a plurality of subcarriers of a frequency band and a plurality of antennas for transmission such that each antenna transmits data using the plurality of the subcarriers;
• dividing data for transmission into a plurality of data elements such that the number of data elements corresponds to the number of subcarriers;
• for each antenna, assigning each element to a subcarrier for transmission, such that for at least two antennas and at least one subcarrier, different elements are assigned to said one subcarrier;
• performing an OFDM modulation for each antenna to produce timing sequences of time-dependent signals;
• and
• for at least one antenna, rearranging the order of the time-dependent signals after OFDM modulation.

A transmitter to transmit data by radio using a plurality of subcarriers of a frequency band and a plurality of antennas for transmission such that each antenna transmits data using the plurality of subcarriers, comprising:

• division means for dividing the data into a plurality of elements such that the number of elements corresponds with the number of subcarriers;
• assignment means for assigning each element to a corresponding subcarrier, the elements being assigned individually for each antenna such that for at least two antennas and at least one subcarrier, different elements are assigned to said one subcarrier;
• and
• an OFDM modulator to perform OFDM modulation for each antenna to produce time-dependent signals;
• wherein the transmitter comprises either:
• multiplication means for multiplying each element for each antenna by an antenna-specific and element-specific factor before OFDM modulation (OFDM), or
• rearrangement means for rearranging the order of the time-dependent signals after OFDM modulation.