Accelerated turbo transceiver and method for MIMO system

A reception apparatus comprising:

• at least one receive antenna configured to receive a signal;
• a detection unit configured to detect extrinsic information based on a tentative symbol decision signal, a channel estimation signal, a noise variance estimation signal, and a signal received by the at least one receive antenna that are obtained from a previous iteration process;
• a Cyclic Redundancy Check (CRC) aided channel decoding unit configured to output an interleaved bit or a posteriori information thereof based on the extrinsic information;
• a tentative symbol decision unit configured to determine a tentative transmission symbol based on an output of the CRC aided channel decoding unit;
• a channel estimation unit configured to estimate a channel based on an output of the tentative symbol decision unit;
• and a noise variance estimation unit configured to estimate a noise variance based on the output of the tentative symbol decision unit and an output of the channel estimation unit.

A communication method comprising:

• performing horizontal encoding and determining which interleaver to use before an iterative transmission is performed at a transmitter using a different interleaver for each bit stream;
• encoding a bit stream to be transmitted to each transmit antenna;
• interleaving the encoded bit stream;
• performing Gray mapping for the interleaved bit stream;
• inserting a pilot symbol into the mapped bit stream;
• transmitting the bit stream with the inserted pilot symbol via each transmit antenna;
• receiving the bit stream;
• detecting extrinsic information based at least partly on a tentative symbol decision signal associated with the received bit stream;
• and
• outputting an interleaved bit or a posteriori information thereof based on the extrinsic information.

A reception method comprising:

• by a receiving apparatus including at least one receive antenna, performing operations including the following:
• a detection operation of detecting extrinsic information based on a tentative symbol decision signal, a channel estimation signal, a noise variance estimation signal, and a signal received by the at least one receive antenna that are obtained from a previous iteration process;
• a CRC aided channel decoding operation of outputting an interleaved bit or a posteriori information thereof based on the extrinsic information;
• a tentative symbol decision operation of determining a tentative transmission symbol based on an output of the CRC aided channel decoding operation;
• a channel estimation operation of estimating a channel based on an output of the tentative symbol decision operation;
• and a noise variance estimation operation of estimating a noise variance based on the output of the tentative symbol decision operation and an output of the channel estimation operation.