Method and apparatus for eliminating frequency-domain interference signals

1. A method for eliminating a frequency-domain interference signal, comprising:

performing Fast Fourier Transformation (FFT), for r, h, and i respectively to obtain a frequency-domain received signal, a frequency-domain channel estimation value, and a frequency-domain interference signal, wherein, r represents a time-domain received signal inclusive of a time-domain interference signal, h represents a time-domain multi-path channel estimation value, and i represents the time-domain interference signal;

multiplying the frequency-domain channel estimation value by the frequency-domain interference signal to obtain a frequency-domain received interference signal; and

subtracting the frequency-domain received interference signal from the frequency-domain received signal to obtain the frequency-domain received signal free of interference.

2. The method of claim 1 , further comprising:

performing Fast Fourier Transformation (FFT) for the time-domain interference signal according to a block length of a frequency-domain equalizer to obtain the frequency-domain interference signal, and pre-storing the frequency-domain interference signal.

3. An apparatus for eliminating a frequency-domain interference signal, comprising:

a multiplying module, adapted to multiply a frequency-domain channel estimation value by a frequency-domain interference signal to obtain a frequency-domain received interference signal; and

a subtracting module, adapted to subtract the frequency-domain received interference signal obtained by the multiplying module from a frequency-domain received signal to obtain the frequency-domain received signal free of interference;

a transforming module, adapted to perform Fast Fourier Transformation (FFT) for r, h, and i respectively to obtain the frequency-domain received signal, the frequency-domain channel estimation value, and the frequency-domain interference signal;

wherein, r represents a time-domain received signal inclusive of a time-domain interference signal, h represents a time-domain multi-path channel estimation value, and i represents the time-domain interference signal.

4. The apparatus of claim 3 , further comprising:

a storing module, adapted to perform Fast Fourier Transformation (FFT) for the time-domain interference signal according to a block length of a frequency-domain equalizer to obtain the frequency-domain interference signal, and pre-store the frequency-domain interference signal.

5. A frequency-domain equalizer, comprising:

an interference signal obtaining module, adapted to obtain a frequency-domain interference signal; and

an interference signal eliminating module, adapted to eliminate the frequency-domain interference signal;

wherein the interference signal obtaining module comprises: an interference signal generator, adapted to generate a time-domain interference signal; and a Fast Fourier Transformation (FFT) unit, adapted to perform FFT for the time-domain interference signal to obtain the frequency-domain interference signal;

wherein the interference signal eliminating module comprises: a multiplying unit, adapted to multiply a frequency-domain channel estimation value by the frequency-domain interference signal to obtain a frequency-domain received interference signal; and a subtracting module, adapted to subtract the frequency-domain received interference signal obtained by the multiplying unit from a frequency-domain received signal to obtain the frequency-domain received signal free of interference.

6. The frequency-domain equalizer of claim 5 , wherein the interference signal obtaining module further comprises:

a storing unit, adapted to store the frequency-domain interference signal.