Method of asymmetrical forward error correction in a communication system. application to wireless local area networks (WLAN) using turbo codes and low density parity check codes

A method of asymmetrical forward error correction for a communication link having two communication directions, where a first type of forward error correction method is used in a first direction of said communication link, and, a second type of forward error correction method is used in a second direction of said communication link, said method comprising the following steps:

• producing in a first device a first encoded stream by applying a first forward error coding encoding method to a first data stream;
• transmitting said first encoded stream over said communication link to a second device,
• receiving said first encoded stream in said second device;
• decoding said first encoded stream by applying a first forward error coding decoding method to produce a first reconstructed data stream,
• producing in said second device a second encoded stream by applying a second forward error coding encoding method to a second data stream, wherein said second forward error coding encoding method is different than said first forward error coding encoding method;
• transmitting said second encoded stream over a communication link to said first device;
• receiving said second encoded stream in said first device;
• and,
• decoding said second encoded stream by applying a second forward error coding decoding method to produce a second reconstructed data stream.

A method of forward error correction for a wireless LAN communications system comprising the following steps:

• producing in a first device a first encoded stream by applying a Turbo Code forward error coding encoding technique to a first data stream;
• transmitting said first encoded stream over a communication link to a second device;
• receiving said first encoded stream in said second device;
• and,
• decoding said first encoded stream by applying a Turbo Code forward error coding decoding technique to produce a first reconstructed data stream.

A method of forward error correction for a wireless LAN communications system comprising the following steps:

• producing in a first device a first encoded stream by applying a Low Density Parity Check Code forward error coding encoding technique to a first data stream;
• transmitting said first encoded stream over a communication link to a second device;
• receiving said first encoded stream in said second device;
• and,
• decoding said first encoded stream by applying a Low Density Parity Check Code forward error coding decoding technique to produce a first reconstructed data stream.

A method of forward error correction for a wireless LAN communications system comprising the following steps:

• producing in a first device a first encoded stream by applying a forward error coding encoding technique to a first data stream;
• transmitting said first encoded stream over a communication link to a second device;
• receiving said first encoded stream in said second device;
• and,
• decoding said first encoded stream by applying a forward error coding decoding technique to produce a first reconstructed data stream.