Space-time coding for communication systems

A device for encoding digital data, comprising:

• a modulator configured to modulate the digital data received from an information source;
• and
• a space-time block code (STBC) generator configured to:
• generate a space-time block code for encoding the modulated digital data, wherein the space-time block code being represented by a set of linear dispersion matrices in a linear dispersion representation, each linear dispersion matrix comprising components having complex values,
• generate at least some of the linear dispersion matrices depending on dispersion matrices, each pair comprising a first linear dispersion matrix and a second linear dispersion matrix, said component-wise conditions comprising a component-wise condition between the components of the first linear dispersion matrix and the components of the second linear dispersion matrix, said component-wise condition depending, for each column of the linear dispersion matrices, on at least one of the real dimensions of the product between a component of the first linear dispersion matrix and the complex conjugate of a component of the second linear dispersion matrix, and wherein said component-wise condition is satisfied if said at least one real dimension of said product is null, for each column of the linear dispersion matrices, and
• generate the encoded modulated digital data based on the generated space-time block code for transmission through a transmission channel to be received by a digital data receiver.

An apparatus for encoding digital data, the apparatus comprising:

• at least a memory, and
• one or more processors configured to:
• modulate the digital data received from an information source;
• generate a space-time block code (STBC) for encoding the modulated digital data, wherein the space-time block code being represented by a set of linear dispersion matrices in a linear dispersion representation, each linear dispersion matrix comprising components having complex values;
• generate at least some of the linear dispersion matrices depending on component-wise conditions related to a set of selected pairs of said linear dispersion matrices, each pair comprising a first linear dispersion matrix and a second linear dispersion matrix, said component-wise conditions comprising a component-wise condition between the components of the first linear dispersion matrix and the components of the second linear dispersion matrix, said component-wise condition depending, for each column of the linear dispersion matrices, on at least one of the real dimensions of the product between a component of the first linear dispersion matrix and the complex conjugate of a component of the second linear dispersion matrix, and wherein said component-wise condition is satisfied if said at least one real dimension of said product is null, for each column of the linear dispersion matrices;
• and
• generate the encoded modulated digital data based on the generated space-time block code for transmission through a transmission channel to be received by a digital data receiver.

An apparatus for decoding digital data, comprising:

• a space-time block code (STBC) decoder configured to:
• receive the encoded digital data from an encoder through a transmission channel;
• decode the encoded digital data based on a space-time block code representing the encoded digital data, wherein the space-time block code comprising a set of linear dispersion matrices in a linear dispersion representation, each linear dispersion matrix comprising components having complex values, and at least some of the linear dispersion matrices are generated depending on component-wise conditions related to a set of selected pairs of said linear dispersion matrices, each pair comprising a first linear dispersion matrix and a second linear dispersion matrix, said component-wise conditions comprising a component-wise condition between the components of the first linear dispersion matrix and the components of the second linear dispersion matrix, said component-wise condition depending, for each column of the linear dispersion matrices, on at least one of the real dimensions of the product between a component of the first linear dispersion matrix and the complex conjugate of a component of the second linear dispersion matrix, and wherein said component-wise condition is satisfied if said at least one real dimension of said product is null, for each column of the linear dispersion matrices;
• and
• a demodulator configured to demodulate decoded digital data to generate the demodulated decoded digital data.

A non-transitory computer storage medium comprising computing instructions which when executed by one or more processors, cause the one or more processors to

• modulate digital data received from an information source;
• generate a space-time block code (STBC) for encoding the modulated digital data, wherein the space-time block code being represented by a set of linear dispersion matrices in a linear dispersion representation, each linear dispersion matrix comprising components having complex values;
• generate at least some of the linear dispersion matrices depending on component-wise conditions related to a set of selected pairs of said linear dispersion matrices, each pair comprising a first linear dispersion matrix and a second linear dispersion matrix, said component-wise conditions comprising a component-wise condition between the components of the first linear dispersion matrix and the components of the second linear dispersion matrix, said component-wise condition depending, for each column of the linear dispersion matrices, on at least one of the real dimensions of the product between a component of the first linear dispersion matrix and the complex conjugate of a component of the second linear dispersion matrix, and wherein said component-wise condition is satisfied if said at least one real dimension of said product is null, for each column of the linear dispersion matrices;
• and
• generate the encoded modulated digital data based on the generated space-time block code for transmission through a transmission channel to be received by a digital data receiver.