Method and apparatus for transmitting a signal
AssigneeFraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
InventorsVolker Jungnickel, Liane Grobe
Life of this patent
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Abstract
A method for transmitting a signal is described, wherein the method has transforming a signal into a frequency domain to obtain a spectrum, forming a filtered spectrum according to a filter spectrum and occupying a set of subcarriers of a frequency domain representation of an Orthogonal Frequency Division Multiplex (OFDM) signal with the filtered spectrum. A temporary signal is obtained by transforming the frequency domain representation of the OFDM signal into a time domain. The temporary signal is subjected to a phase modulation.
Claims18
A method for transmitting a signal, the method comprising
- transforming a signal into a frequency domain to acquire a spectrum;
- forming a filtered spectrum according to a filter spectrum;
- transforming a frequency domain representation of an Orthogonal Frequency Division Multiplex (OFDM) signal, the frequency domain partially occupied with the filtered spectrum, into a time domain to acquire a temporary signal;
- and
- subjecting the temporary signal to a phase modulation to obtain a phase modulated temporary signal;
- wherein the temporary signal is subjected to a continuous phase modulation comprising a minimum shift keying.
A method for receiving a signal, the method comprising:
- transforming, using DFT, an OFDM signal, the frequency representation thereof partially occupied with a filtered spectrum to a time domain to acquire a phase-modulated temporary signal;
- subjecting the phase-modulated temporary signal to a phase de-modulation to acquire a temporary signal;
- transforming the temporary signal into a frequency domain to acquire a spectrum;
- forming the spectrum according to a matched filter spectrum;
- subjecting the matched filter spectrum to a maximum ratio combining;
- and
- transforming, using IDFT, the result of the maximum ratio combining.
An apparatus for transmitting a signal, the apparatus configured to
- transform a signal into a frequency domain such that a spectrum is acquired;
- form a filtered spectrum according to a filter spectrum;
- transform an Orthogonal Frequency Division Multiplex (OFDM) spectrum partially occupied with the filtered spectrum into a time domain such that a temporary signal is acquired;
- subject the temporary signal to a phase modulation to obtain a phase modulated temporary signal;
- and
- wherein the temporary signal is subjected to a continuous phase modulation comprising a minimum shift keying.
An apparatus for receiving a signal, the apparatus configured to
- transform, using DFT, an OFDM signal, the frequency representation thereof partially occupied with a filtered spectrum to a time domain such that a phase-modulated temporary signal is acquired;
- subject the phase-modulated temporary signal to a phase de-modulation such that a temporary signal is acquired;
- transform the temporary signal into a frequency domain such that a spectrum is acquired;
- form the spectrum according to a matched filter spectrum;
- subject the matched filter spectrum to a maximum ratio combining;
- and
- transform, using IDFT, the result of the maximum ratio combining.
Dependencies are inferred from the claim text.