Coded Orthogonal Frequency Division Multiplexing Method and Apparatus
AssigneeKoninklijke Philips Electronics N.V.
InventorsVasanth Gaddam, Dagnachew Birru
Life of this patent
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Abstract
A method and apparatus for transmitting and receiving data via guard tones are described. The information bits are coded by convolutional encoder (101) and some of the punctured bits from punctured (102) are selected with bit selector (105) and subject as the punctured data to interleaving by an interleaver (106-103 for the punctured data-). The OFDM process that follows (104, 107, 108) maps the interleaved selected punctured bits to guard tones and the interleved punctured data to data sub-carriers.
Claims20
A method of transmitting data, the method comprising:
- coding an information bit into a plurality of coded bits;
- puncturing a select number of the coded bits and removing the select number of bits from a data path;
- mapping at least one of the removed coded bits onto respective guard tones;
- and
- transmitting the guard tones.
An apparatus adapted to transmit data, comprising:
- a coder adapted to code an information bit into a plurality of coded bits;
- a puncturer adapted to receive the plurality of coded bits and to remove a select number of the coded bits from a data path;
- a bit selector adapted to select a group of the select number of the coded bits;
- a mapping device adapted to map each bit or a plurality of bits from the group of bits onto a respective guard tone.
A wireless communication system, comprising:
- a transmitter, comprising:
- a coder adapted to code an information bit into a plurality of coded bits;
- a puncturer adapted to receive the plurality of coded bits and to remove a select number of the coded bits from a data path;
- a bit selector adapted to select a group of the select number of the coded bits;
- a mapping device adapted to map each bit or a plurality of bits from the group of bits to a respective guard tone;
- and
- a receiver adapted to receive bits from a data sub-carrier and the bits from the guard tones, wherein the receiver includes a depuncturer that selects at least one of the bits from the guard tones and provides the at least one bit to another depuncturer.
Dependencies are inferred from the claim text.