Mapping cells to symbols
AssigneeSamsung Electronics Co., Ltd.
InventorsBelkacem MOUHOUCHE, Daniel ANSORREGUI, Alain MOURAD, Hong-sil JEONG
Life of this patent
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Abstract
A method for mapping cells onto symbols is provided. The cells include two or more cells processed by pre-coding in groups, the symbols include N symbols in a time-sequence, and each symbol includes M carriers in a frequency-order. The method comprises: mapping each cell to a carrier of a symbol; and frequency interleaving the carriers of each symbol. The mapping and the frequency interleaving are performed such that, following the frequency interleaving, the cells of a group of pre-coded cells are each mapped to carriers having the same carrier frequency or to carriers having carrier frequencies differing by no more than a threshold.
Claims37
A method for mapping cells onto symbols, wherein the cells comprise two or more cells processed by pre-coding in groups, the symbols comprise N symbols in a time-sequence, and each symbol comprises M carriers in a frequency-order, where each of N and M is an integer greater than 0, the method comprising:
- mapping each cell to a carrier of a symbol;
- and
- frequency interleaving the carriers of each symbol,
- wherein the mapping and the frequency interleaving are performed such that, following the frequency interleaving, the cells of a group of pre-coded cells are each mapped to carriers having the same carrier frequency or to carriers having carrier frequencies differing by no more than a threshold.
A method for mapping cells onto symbols, wherein the symbols comprise N symbols in a time-sequence, and each symbol comprises M carriers in a frequency-order, where each of N and M is an integer greater than 0, the method comprising:
- spreading a set of first cells such that each first cell is divided into two or more chips, wherein the chips are used to form a set of second cells such that each second cell is formed by combining a number of chips derived from the set of first cells, such that the chips derived from each of the first cells are distributed to at least two different second cells;
- mapping each cell of the set of second cells to a carrier of a symbol;
- and
- frequency interleaving the carriers of each symbol,
- wherein the mapping and the frequency interleaving are performed such that, following the frequency interleaving, the cells of the set of second cells are each mapped to carriers having the same carrier frequency or to carriers having carrier frequencies differing by no more than a threshold.
A method for de-mapping cells from symbols,
- wherein the symbols comprise N symbols in a time-sequence,
- wherein each symbol comprises M carriers in a frequency-order, where each of N and M is an integer greater than 0, and
- wherein each carrier comprises a second cell that has been formed by combining a number of chips derived from a set of first cells, the method comprising:
- frequency de-interleaving the carriers of each symbol;
- de-mapping a set of second cells from respective carriers;
- and
- de-spreading the chips of the set of second cells to obtain a set of first cells,
- wherein each cell of the set of first cells is obtained from chips of at least two different second cells.
A method for mapping cells onto symbols,
- wherein the symbols comprise N symbols in a time-sequence,
- wherein each symbol comprises M carriers in a frequency-order, where each of N and M is an integer greater than 0, and
- wherein the cells comprise a sequence of cells,
- the method comprising:
- interleaving the sequence of cells to obtain an interleaved sequence of cells;
- and
- mapping a first set of M sequential cells of the interleaved sequence of cells to M respective carriers of a first symbol;
- and
- repeating the interleaving and the mapping based on successive sets of M sequential cells and successive symbols.
A method for de-mapping cells from symbols, wherein the cells comprise two or more cells processed by pre-coding in groups, the symbols include N symbols in a time-sequence, and each symbol comprises M carriers in a frequency-order, where each of N and M is an integer greater than 0, the method comprising:
- frequency de-interleaving the carriers of each symbol;
- and
- de-mapping cells from carriers of each symbol,
- wherein, prior to the frequency de-interleaving, the cells of a group of pre-coded cells are each mapped to carriers having the same carrier frequency or to carriers having carrier frequencies differing by no more than a threshold.
A method for de-mapping cells from symbols, wherein the symbols comprise N symbols in a time-sequence, and each symbol comprises M carriers in a frequency-order, where each of N and M is an integer greater than 0, the method comprising:
- de-mapping a first set of M cells from M respective carriers of a first symbol;
- repeating the de-mapping based on successive sets of M cells and successive symbols, to obtain an interleaved sequence of cells from the de-mapped cells;
- and
- de-interleaving the interleaved sequence of cells to obtain a de-interleaved sequence of cells.
An apparatus for mapping cells onto symbols, wherein the cells comprise two or more cells processed by pre-coding in groups, the symbols comprise N symbols in a time-sequence, and each symbol includes M carriers in a frequency-order, where each of N and M is an integer greater than 0, the apparatus comprising:
- a mapper configured to map each cell to a carrier of a symbol;
- and
- a frequency interleaver configured to frequency interleave the carriers of each symbol,
- wherein the mapper and the frequency interleaver perform the mapping and the frequency interleaving such that, following the frequency interleaving, the cells of a group of pre-coded cells are each mapped to carriers having the same carrier frequency or to carriers having carrier frequencies differing by no more than a threshold.
Dependencies are inferred from the claim text.