Method for sending and receiving communication signals, and apparatuses for sending and receiving communication signals

1. A method for sending communication signals; in which space-time block coding is performed, comprising;

dividing a data stream of complex-value data symbols into a number K T of partial data streams of data symbols, wherein K T >2, and wherein a number n of data symbols in each partial data stream is greater than 2 data symbols;

arranging the data symbols in the partial data streams to form an n×K T matrix C K T ;

performing transmitter-end predistortion using the matrix C K T to form a matrix D comprised of transmission data symbols; and

transmitting the transmission data symbols as communication signals using K T transmission antennas according to an arrangement of the transmission data symbols in the matrix D.

2. The method of claim 1 , wherein the matrix C K T is used to form the matrix D according to:

D =( C K T T C K T ) −1 C K T T or

D= C K T T ( C K T C K T T ) −1 .

3. The method of claim 1 , wherein the matrix C K T is orthogonal or quasi-orthogonal.

4. The method of claim 1 , wherein a multicarrier method is used for transmitting the transmission data symbols.

5. The method of claim 4 , wherein the multicarrier method comprises an OFDM method.

6. The method of claim 1 , wherein a single-carrier method is used for transmitting the transmission data symbols.

7. The method of claim 1 , further comprising:

spectral coding an initial bit data stream to obtain a discrete complex-value spectrum; and

obtaining the data stream of complex-value data symbols, by means of inverse discrete Fourier transformation of the complex-value spectrum.

8. The method of claim 1 , further comprising:

receiving the transmission data symbols as communication signals and performing sampling thereon to form samples; and

supplying the receive samples to a space-time block decoder.

9. The method of claim 8 , further comprising multiplying the receive samples using the matrix C K T .

10. The method of claim 9 , wherein the multiplying comprises linear filtering the receive samples using a filter having filter characteristics or filter coefficients that are derived from the matrix C K T .

11. An apparatus for sending communication signals, comprising:

a division unit configured to divide a data stream comprising complex-value data symbols into a number K 1 of partial data streams, wherein K T >2, and wherein each partial data stream comprises a number n of data symbols, wherein n>2;

a space-time block coder comprising a matrix forming component configured to form an n×K T matrix C K T from the data symbols in the partial data streams, and a predistorter unit configured to perform transmitter-end predistortion by forming a matrix D from the matrix C K T ; and

a number K T of transmission antennas configured to transmit the data symbols as communication signals according to their arrangement in the matrix D.

12. The apparatus of claim 11 , wherein the predistorter unit is configured to form the matrix D according to:

D =( C K T T C K T ) −1 C K T T or

D= C K T T ( C K T C K T T ) −1 .

13. The apparatus of claim 11 , wherein the matrix forming component is configured to form the matrix C K T as an orthogonal or quasi-orthogonal matrix.

14. The apparatus of claim 11 , further comprising:

a Fourier transformation unit configured to transform the data stream of pre-distored complex-value data symbols into a time-domain communication signal using inverse discrete Fourier transformation.

15. The apparatus of claim 11 , further comprising:

K T reception antennas configured to receive time-domain communication signals from the transmission antennas;

a sampling device configured to produce receive samples from the time-domain communication signals; and

a space-time block decoder configure to decode the receive samples to generate decoded data signals.

16. The apparatus of claim 15 , wherein the space-time block decoder is configured to multiply the receive samples by the matrix C K T .

17. The apparatus of claim 15 , wherein the space-time block decoder comprises a filter comprising filter characteristics or filter coefficients that are derived from the matrix C K T .