System and method for variable forward error correction (FEC) protection
View Patent ↗A communications system includes a transmitter having an encoder for encoding communications data and varying at least one of a puncturing of the code rate and a repetition rate on different portions of the communications data. As a result, a variable forward error correction is added to different portions of the communications data.
1. A communications system, comprising:
an encoder for encoding communications data having a header and varying one of a puncturing of the code rate and a repetition rate on the header, wherein a variable forward error correction is added to different portions of the communications data; and
an interleaver for interleaving all or part of the communications data after encoding.
2. A communications system according to claim 1 , wherein said encoder is operative for encoding communications data with a Forward Error Correction (FEC) code comprising a convolutional code, a turbo-code or other FEC code that can be punctured.
3. A communications system according to claim 1 , wherein said encoder is operative for varying one of at least the puncturing of the code rate and repetition rate on communications data corresponding to a packet header.
4. A communications system according to claim 3 , wherein said encoder is operative for encoding a portion of the packet header with a rate 1/n code and repeating again.
5. A communications system according to claim 1 , wherein said encoder is operative for inserting flush bits for communications data that are encoded at different rates.
6. A communications system, comprising:
a transmitter comprising,
a convolutional encoder for encoding communications data having a header and varying at least one of a puncturing of the code rate and a repetition rate on the header, wherein a variable forward error correction is added to different portions of the communications data, and
a modulator that receives the communications data after encoding and forms a communications signal for transmission; and
a receiver that receives the communications signal from the transmitter, and comprising,
a demodulator that demodulates the communications signal, and
a decoder that decodes the communications data for further processing.
7. A system according to claim 6 , wherein said modulator at the transmitter is operative for mapping the communications data into symbols based on a mapping algorithm to form a communications signal.
8. A system according to claim 6 , wherein said convolutional encoder is operative for varying at least one of the puncturing of the code rate and repetition rate on communications data corresponding to a packet header.
9. A system according to claim 8 , wherein said convolutional encoder is operative for encoding a portion of the packet header with a rate 1/n code and repeating again.
10. A system according to claim 6 , and further comprising an interleaver at the transmitter for interleaving the encoded communications data.
11. A system according to claim 6 , wherein said decoder at said receiver comprises a Viterbi decoder.
12. A method for communicating data, which comprises:
encoding communications data having a header using an encoder; and
varying one of at least a puncturing of the code rate and a repetition rate on the header, wherein a variable forward error correction is added to different portions of the communications data.
13. A method according to claim 12 , and further comprising encoding communications data with a Forward Error Correction (FEC) code comprising a convolutional code, turbo-code, or other FEC code that can be punctured.
14. A method according to claim 12 , which further comprises varying at least one of the puncturing of the code rate and repetition rate on communications data corresponding to a packet header.
15. A method according to claim 14 , which further comprises encoding a portion of the communications data corresponding to a packet header with a rate 1/n code and repeating again.
16. A method according to claim 12 , which further comprises inserting flush bits for all communications data that are encoded at different rates.
17. A method according to claim 12 , which further comprises decoding the communications data using a Viterbi decoder.
18. A method for communicating data, which comprises:
processing communications data having a header at a transmitter by convolutionally encoding the communications data while varying one of at least a puncturing of the code rate and a repetition rate on the header, wherein a variable forward error correction is added to different portions of the data;
modulating the communications data;
transmitting the communications data;
receiving the communications data within a receiver;
demodulating the communications data; and
decoding the communications data for further processing.
19. A method according to claim 18 , which further comprises varying at least one of the puncturing of the code rate and repetition rate on communications data corresponding to a packet header.
20. A method according to claim 19 , which further comprises encoding a portion of the communications data corresponding to a packet header with a rate 1/n code and repeating again.
21. A method according to claim 18 , which further comprises inserting flush bits for all communications data that are encoded at different rates.
22. A method according to claim 18 , which further comprises interleaving the communications data after encoding the communications data using a single interleaver.
23. A method according to claim 18 , which further comprises decoding the communications data at the receiver using a Viterbi decoder.
24. An encoder apparatus, comprising:
a convolutional encoder module that convolutionally encodes communications data having a header; and
a code puncturing module that varies at least one of a puncturing of the code rate and a repetition rate on the header, wherein a variable forward error correction is added to different portions of the communications data.
25. An encoder apparatus according to claim 24 , wherein said code puncturing module varies at least one of the puncturing of the code rate and repetition rate on data corresponding to a packet header.
26. An encoder apparatus according to claim 25 , wherein said code puncturing module encodes a portion of the data corresponding to a packet header with a rate 1/n code and repeats again.
27. An encoder apparatus according to claim 24 , and further comprising a single interleaver that interleaves communications data after encoding.
28. A communications system, comprising:
an encoder for encoding communications data and varying one of a puncturing of the code rate and a repetition rate on different portions of the communications data corresponding to a packet header, wherein a variable forward error correction is added to different portions of the communications data; and
an interleaver for interleaving all or part of the communications data after encoding.
29. A communications system, comprising:
an encoder for encoding communications data and varying one of a puncturing of the code rate and a repetition rate on different portions of the communications data and inserting flush bits for communications data that are encoded at different rates, wherein a variable forward error correction is added to different portions of the communications data; and
an interleaver for interleaving all or part of the communications data after encoding.
30. A method for communicating data, which comprises:
encoding communications data using an encoder; and
varying one of at least a puncturing of the code rate and a repetition rate on different portions of the communications data corresponding to a packet header, wherein a variable forward error correction is added to different portions of the communications data.
31. A method for communicating data, which comprises:
encoding communications data using an encoder; and
varying one of at least a puncturing of the code rate and a repetition rate on different portions of the communications data while inserting flush bits for all communications data that are encoded at different rates, wherein a variable forward error correction is added to different portions of the communications data.
32. An encoder apparatus, comprising:
a convolutional encoder module that convolutionally encodes communications data; and
a code puncturing module that varies at least one of a puncturing of the code rate and a repetition rate on different portions of the communications data corresponding to a packet header, wherein a variable forward error correction is added to different portions of the communications data.