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US 2008/0313523 A1Published application
Encoding low density parity check (ldpc) codes through an ldpc decoder
AssigneeThe DIRECTV Group, Inc.
InventorsFeng-Wen Sun, Mustafa Eroz, Lin-Nan Lee
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Abstract
An approach is providing for supporting broadcast transmission of low density parity check (LDPC) coded signals. A receiver includes a decoder configured to decode an LDPC signal to output a decoded signal. The decoder is further configured to operate as an encoder; as such, interference cancellation can be implemented by the encoder re-encoded the received decoded signal. The above approach has particular applicability to satellite broadcast systems.
Claims20
A method comprising:
- receiving a plurality of information bits that are to be encoded;
- constructing a receiving vector based on the information bits;
- initializing a low density parity check (LDPC) decoder with the constructed vector;
- performing, by the decoder, a hard decision into a binary vector;
- and
- computing a final parity check to output an encoded signal based on the binary vector.
3 more elements
An apparatus comprising:
- a low density parity check (LDPC) decoding logic configured to receive a plurality of information bits that are to be encoded, and to construct a receiving vector based on the information bits to initialize the decoding logic,
- wherein the decoding logic is further configured to perform a hard decision into a binary vector and to compute a final parity check for outputting an encoded signal based on the binary vector.
A method comprising:
- utilizing low density parity check (LDPC) decoding hardware to encode a plurality of information bits by,
- constructing a receiving vector based on the information bits to initialize the decoding hardware,
- performing a hard decision into a binary vector, and
- computing a final parity check to output an encoded signal based on the binary vector.
1 more element
A receiver comprising:
- low density parity check (LDPC) decoding hardware configured to encode a plurality of information bits by,
- constructing a receiving vector based on the information bits to initialize the decoding hardware,
- performing a hard decision into a binary vector, and
- computing a final parity check to output an encoded signal based on the binary vector.
1 more element
Dependencies are inferred from the claim text.