Method of separating sources in a multisource system

A method of processing data conveyed by at least two data signals by a data processing device, the method comprising:

• receiving the at least two data signals, said data being divided into data blocks of identical size including a header field, which is a cyclic prefix and has a predetermined size, the header field of one of said data signals being different in size from the predetermined size of the header field of the other said data signal;
• applying a cyclic autocorrelation function with parameter k of fixed value to the data blocks of said data signals, wherein the value of the parameter k is a natural integer and a multiple of a ratio between the size of said data blocks and the predetermined size of the header field;
• and
• if applying the cyclic autocorrelation function yields a non-null result, identifying said one of said data signals in which the size of the header field of the data blocks is different from said predetermined size of the header field, the value of the parameter k and the size of the data blocks remaining unchanged.

A device comprising:

• a non-transitory memory comprising a computer program stored thereon;
• and
• a computer, which is configured by the computer program to execute the following steps:
• sending data by at least a first data signal and a second data signal, said data being divided into data blocks of identical size including a header field, which is a cyclic prefix and has a predetermined size, said data signals being sent to at least one data processing device adapted to apply a cyclic autocorrelation function with parameter k of fixed value to the data blocks of the first and second data signals enabling said first and second data signals to be identified, wherein the value of the parameter k is a natural integer and a multiple of a ratio between the size of said data blocks and the predetermined size of the header field;
• and
• if said first data signal needs to be separated from said second data signal, modifying the size of the header field of the data blocks of said first data signal before sending said first data signal, so that the size of the header field of the data blocks of said first data signal is different from said predetermined size of the header field of the data blocks of said second data signal, the value of the parameter k and the size of said data blocks remaining unchanged.

A device for processing data conveyed by at least two data signals, said data being divided into data blocks of identical size including a header field, which is a cyclic prefix and has a predetermined size, said device including:

• a non-transitory memory comprising a computer program stored thereon;
• and
• a computer, which is configured by the computer program to execute the following steps:
• receiving the at least two data signals, the header field of one of said data signals being different in size from the predetermined size of the header field of the other said data signal;
• applying a cyclic autocorrelation function with parameter k of fixed value to the data blocks of said data signals, wherein the value of the parameter k is a natural integer and a multiple of a ratio between the size of said data blocks and the predetermined size of the header field;
• and
• if applying the cyclic autocorrelation function yields a non-null result, identifying said one of said data signals in which the size of the header field of the data blocks is different from said predetermined size of the header field, the value of the parameter k and the size of the data blocks being unchanged.

A system comprising:

• at least one sending device configured to send data by at least a first data signal and a second data signal, said data being divided into data blocks of identical size including a header field, which is a cyclic prefix and has a predetermined size, and comprising:
• a first non-transitory memory comprising a first computer program stored thereon;
• and
• a first computer, which is configured by the first computer program to execute the following steps:
• modifying the size of the header field of the data blocks of said first data signal, if said first data signal needs to be separated from said second data signal, before sending said first data signal, so that the size of the header field of the data blocks of said first data signal is different from said predetermined size of the header field of the data blocks of said second data signal, a value of a parameter k and the size of said data blocks remaining unchanged;
• and
• at least one processing device for processing the data conveyed from the at least one sending device by at least the first data signal and the second data signal, said processing device comprising:
• a second non-transitory memory comprising a second computer program stored thereon;
• and
• a second computer, which is configured by the second computer program to execute the following steps:
• applying a cyclic autocorrelation function with the parameter k of fixed value to the data blocks of the first data signal and the second data signal, wherein the value of the parameter k is a natural integer and a multiple of a ratio between the size of said data blocks and the predetermined size of the header field;
• and
• if applying the cyclic autocorrelation function yields a non-null result, identifying said one of said data signals in which the size of the header field of the data blocks is different from said predetermined size of the header field.

A non-transitory computer-readable medium comprising a computer program product stored thereon, wherein the product includes program code instructions for executing a method of processing data when said program is executed by a computer, wherein the method comprises:

• processing data conveyed by at least two data signals, said data being divided into data blocks of identical size including a header field, which is a cyclic prefix and has a predetermined size, the header field of one of said data signals being different in size from the predetermined size of the header field of the other said data signal;
• and
• applying a cyclic autocorrelation function with parameter k of fixed value to the data blocks of said data signals, wherein the value of the parameter k is a natural integer and a multiple of a ratio between the size of said data blocks and the predetermined size of the header field;
• and
• if applying the cyclic autocorrelation function yields a non-null result, identifying said one of said data signals in which the size of the header field of the data blocks is different from said predetermined size of the header field, the value of the parameter k and the size of the data blocks remaining unchanged.