Receiver and method for digital multi carrier transmission

A receiver employing a digital wavelet multi-carrier demodulation for receiving data transmitted from a transmitter, said receiver comprising:

• a first wavelet transforming means for performing a wavelet transform of received data;
• a second wavelet transforming means for performing a wavelet transform of received data, said second wavelet transforming means being orthogonal to said first wavelet transforming means;
• a complex data generating means for generating complex data by defining outputs from said first wavelet transforming means as in-phase components of complex information and outputs from said second wavelet transforming means as orthogonal components of the complex information, and outputting the complex data;
• an equalizing means for equalizing the complex data, and outputting an equalized complex data;
• a clock-inconsistency compensating means for compensating a clock-inconsistency between said receiver and the transmitter by using a result of a decision means and the equalized complex data, and outputting a compensated complex data;
• and
• said decision means for deciding whether communication data exists in the compensated complex data, and outputting a result of the decision.

A method for receiving data from a digital multi-carrier transmission, said method comprising:

• performing a first wavelet transform of received data and outputting first transformed data;
• performing a second wavelet transform of received data and outputting second transformed data;
• generating complex data by defining the first transformed data as in-phase components of complex information and the second transformed data as orthogonal components of the complex information and outputting the complex data;
• equalizing the complex data, and outputting an equalized complex data;
• compensating a clock-inconsistency between a receiver and a transmitter by using a result of a decision and the equalized complex data, and outputting a compensated complex data;
• and
• deciding the compensated complex data, and outputting a result of the decision.

28 The receiver according to claim 26 further comprising:

• an equalizer operable to equalize the wavelet-transformed data, and output equalized data;
• and
• a decision unit operable to decide whether communication data exists, and output a result of the decision,
• wherein said clock-inconsistency compensator operable to compensate a clock-inconsistency between said receiver and the transmitter by using the result of the decision and the equalized data, and operable to output compensated data.