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US 9,167,579 B2Granted
Method and transmitter/receiver for data transmission with flexible exploitation of time and frequency diversity
AssigneeVodafone Holding GmbH
InventorsGerhard Fettweis, Nicola Michailow, Stefan Krone, Michael Lentmaier, Eckhard Ohlmer
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Abstract
A method and corresponding devices for processing and transmitting information are described. A sequence of binary signals is mapped to symbols that forms a two-dimensional matrix of symbols in one of the frequency-time or time-time or time-frequency or frequency-frequency domain and which may be filtered in that domain. Selecting the diagonal elements of said matrix forms a transmit vector.
Claims16
A method for transmitting data on multiple carriers, comprising the steps of:
- mapping data to symbols and arranging the symbols to form a K-by-M matrix D of symbols dkm, wherein 0≦k<K and K>1 and 0≦m<M and M>1;
- filtering the matrix of symbols using a filter thereby producing a matrix of filtered symbols, wherein the filter domain is dynamically selected from a group comprising the time-time domain and the time-frequency domain and the frequency-time domain and the frequency-frequency domain depending on current transmit channel properties;
- applying at least one Fourier or inverse Fourier transformation on the matrix of filtered symbols thereby producing a matrix of transformed filtered symbols;
- forming a transmit vector from the diagonal elements of the matrix of transformed filtered symbols;
- and
- transmitting the transmit vector.
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A method for receiving data, comprising the steps of:
- receiving a radio signal and producing digital samples from the received signal;
- forming a matrix of samples wherein the digital samples of the received signal form diagonal elements of said matrix of samples;
- downconverting the matrix of samples;
- filtering the matrix of samples using a filter, wherein the filter domain is dynamically selected from a group comprising the frequency-time and the time-frequency and the time-time and the frequency-frequency domain depending on current transmit channel properties and corresponding to the filtering at a transmitter thus producing a matrix of filtered samples;
- downsampling the matrix of filtered samples thereby producing a matrix of downsampled filtered samples;
- and
- detecting symbols represented by samples of the matrix of downsampled filtered samples in the frequency-time or time-frequency or time-time or frequency-frequency domain.
4 more elements
Dependencies are inferred from the claim text.