System and method for reducing interference in an orthogonal frequency division modulation system
AssigneeMotorola, Inc.
InventorsCOLIN D. FRANK, ROBERT J. CORKE, JORGE L. SEOANE
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Abstract
An interference contribution associated with a selected subcarrier of a plurality of subcarriers associated with a previously transmitted OFDM symbol or a current OFDM symbol is determined. A fast Fourier transform (FFT) output for the current OFDM symbol is also determined. The interference contribution is subtracted from the FFT output of the current OFDM symbol to form a modified
Claims18
A method of reducing interference in an Orthogonal Frequency Division Modulation (OFDM) communication system comprising:
- determining an interference contribution associated with a selected subcarrier of a plurality of subcarriers associated with a previously transmitted OFDM symbol;
- determining a fast Fourier transform (FFT) output for a current OFDM symbol;
- and
- subtracting the interference contribution from the FFT output of the current OFDM symbol to form a modified FFT output.
A method of reducing interference in an Orthogonal Frequency Division Modulation (OFDM) communication system comprising:
- determining a first interference contribution from a first selected subcarrier of a plurality of subcarriers associated with a current OFDM symbol;
- determining a fast Fourier transform (FFT) output of the current OFDM symbol;
- and
- subtracting the first interference contribution from the FFT output of the current OFDM symbol to form a modified FFT output.
An apparatus for reducing interference in communications conducted in an OFMD communication system comprising:
- a receiver for receiving a current OFDM symbol;
- a memory for storing information corresponding to a previously transmitted OFDM symbol;
- and
- a processing device coupled to the receiver, and the memory, the processing device being programmed to determine a first interference contribution associated with a selected subcarrier of the previously transmitted OFDM symbol, determine an FFT output of the current OFDM symbol, and subtract the first interference contribution from the FFT output of the current OFDM symbol to form a modified FFT.
Dependencies are inferred from the claim text.