Frequency-domain decision feedback equalizing device and method
First Claim
1. A frequency-domain decision feedback equalizer device for single carrier modulation, preferably for use in a broadband communication system, including a first section comprising:
- a fast Fourier transforming means for performing a fast Fourier transformation on a first vector of signals inputted into said first section, and outputting a second vector of signals, a feed forward equalization means for performing a feed forward equalization by multiplying each of the components of said second vector of signals with equalization parameters, and outputting a third vector of signals, and an inverse fast Fourier transforming means for performing an inverse fast Fourier transformation on said third vector of signals, and outputting a fourth vector of signals; and
a second section comprising;
a feedback filter means for performing a linear filtering of a signal derived from an output signal of said second section, an adding means for adding the output signal of said feedback filter means to the output signal of said first section, and a detector means for receiving the output signal of said adding means and generating said output signal of said second section by extracting samples from the output signal of said adding means.
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Abstract
Disclosed is a frequency-domain decision feedback equalizing method and device for single carrier modulation, preferably for use in a broadband communication system, wherein in a first section a fast Fourier transformation is performed on a first vector of signals inputted, and as a result a second vector of signals is provided, a feed forward equalization is performed by multiplying each of the components of said second vector of signals with equalization parameters, and as a result a third vector of signals is provided, an inverse fast Fourier transformation is performed on said third vector of signals, and as a result a fourth vector of signals is provided, and an output signal of said first section is provided on the basis of said fourth vector of signals; and in a second section a linear feedback filtering of a signal derived from an output signal of said second section is performed, and a filtered signal is provided, said filtered signal is added to said output signal of said first section, and an added signal is provided, and said output signal of said second section is generated by extracting samples from said added signal.
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Citations
32 Claims
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1. A frequency-domain decision feedback equalizer device for single carrier modulation, preferably for use in a broadband communication system, including a first section comprising:
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a fast Fourier transforming means for performing a fast Fourier transformation on a first vector of signals inputted into said first section, and outputting a second vector of signals, a feed forward equalization means for performing a feed forward equalization by multiplying each of the components of said second vector of signals with equalization parameters, and outputting a third vector of signals, and an inverse fast Fourier transforming means for performing an inverse fast Fourier transformation on said third vector of signals, and outputting a fourth vector of signals; and
a second section comprising;
a feedback filter means for performing a linear filtering of a signal derived from an output signal of said second section, an adding means for adding the output signal of said feedback filter means to the output signal of said first section, and a detector means for receiving the output signal of said adding means and generating said output signal of said second section by extracting samples from the output signal of said adding means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 17)
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- 13. A transmitter of a communication system using a single carrier modulation, for transmitting data, comprising a modulating means for organizing the data in blocks wherein each block is separated by a sequence of a predetermined signal.
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18. A frequency-domain decision feedback equalizing method for single carrier modulation, preferably for use in a broadband communication system, comprising the steps of:
- in a first section;
performing a fast Fourier transformation on a first vector of signals inputted, and as a result providing a second vector of signals, performing a feed forward equalization by multiplying each of the components of said second vector of signals with equalization parameters, and as a result providing a third vector of signals, performing an inverse fast Fourier transformation on said third vector of signals, and as a result providing a fourth vector of signals, and providing an output signal of said first section on the basis of said fourth vector of signals; and
in a second section;
performing a linear feedback filtering of a signal derived from an output signal of said second section, and providing a filtered signal, adding said filtered signal to said output signal of said first section, and providing an added signal, and generating said output signal of said second section by extracting samples from said added signal. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
- in a first section;
- 29. A method for transmitting data using a single carrier modulation, comprising a modulating step for organizing the data in blocks wherein each block is separated by a sequence of a predetermined signal.
Specification