Method and apparatus for data transmission

A data transmission method comprising the steps of:

• distributing received data by using a second orthogonal sequence;
• deinterleaving the distributed data on a frequency axis and a time axis;
• distributing the deinterleaved data by using a first orthogonal sequence;
• and
• interpolating a noise component of the data by using a zero-point synchronized with the received data, and subtracting the noise component from the data, before the second distributing step.

A data transmission apparatus comprising:

• means for receiving data from a transparent transmission line;
• means for distributing the data by using an orthogonal sequence;
• and
• means for interpolating a noise component of the data by using a zero-point synchronized with the received data, and for subtracting the noise component from the data, between the receiving and distributing means.

A data transmission apparatus comprising:

• means for distributing received data by using a second orthogonal sequence;
• means for deinterleaving the distributed data on a frequency axis and a time axis;
• means for distributing the deinterleaved data by using a first orthogonal sequence;
• and
• means for interpolating a noise component of the data by using a zero-point synchronized with the received data, and for subtracting the noise component from the data, before the second distributing means.

A data transmission method comprising the steps of:

• multiplexing data by using a first orthogonal sequence;
• interleaving the multiplexed data on a frequency axis and a time axis;
• and
• multiplexing the interleaved multiplexed data to be transmitted by using a second orthogonal sequence.

A data transmission method comprising the steps of:

• distributing received data by using a second orthogonal sequence;
• deinterleaving the distributed data on a frequency axis and a time axis;
• and
• distributing the deinterleaved data by using a first orthogonal sequence.

A data transmission apparatus comprising:

• means for multiplexing data by using a first orthogonal sequence;
• means for interleaving the multiplexed data on a frequency axis and a time axis;
• and
• means for multiplexing the interleaved multiplexed data to be transmitted by using a second orthogonal sequence.

A data transmission apparatus comprising:

• means for distributing received data by using a second orthogonal sequence;
• means for deinterleaving the distributed data on a frequency axis and a time axis;
• and
• means for distributing the deinterleaved data by using a first orthogonal sequence.