Methods and systems for digital wireless communication

A system for digital wireless communications, comprising:

• a digital processing device that:
• receives a first transmitted signal that was transmitted from a first transmitter antenna, wherein the first transmitted signal contains first symbols corresponding to data interleaved by a first interleaver at a first location;
• receives a second transmitted signal that was transmitted from a second transmitter antenna, wherein the second transmitted signal contains second symbols corresponding to data that is a interleaved by a second interleaver at the first location;
• receives a third transmitted signal that was transmitted from a third transmitter antenna, wherein the third transmitted signal contains third symbols corresponding to data interleaved by a third interleaver at a second location;
• receives a fourth transmitted signal that was transmitted from a fourth transmitter antenna, wherein the fourth transmitted signal contains fourth symbols corresponding to data interleaved by a fourth interleaver at the second location;
• forms a first log likelihood ratio (LLR) for the first transmitted signal using a first mean value and a first variance value;
• forms a second log likelihood ratio (LLR) for the second transmitted signal using a second mean value and a second variance value;
• forms a third log likelihood ratio (LLR) for the third transmitted signal using a third mean value and a third variance value;
• forms a fourth log likelihood ratio (LLR) for the fourth transmitted signal using a fourth mean value and a fourth variance value;
• de-interleaves the first LLR with a first de-interleaver to form a first de-interleaved LLR;
• de-interleaves the second LLR with a second de-interleaver to form a second de-interleaved LLR;
• de-interleaves the third LLR with a third de-interleaver to form a third de-interleaved LLR;
• de-interleaves the fourth LLR with a fourth de-interleaver to form a fourth de-interleaved LLR;
• sums the first de-interleaved LLR with the second de-interleaved LLR to form a first a posteriori LLR;
• sums the third de-interleaved LLR with the fourth de-interleaved LLR to form a second a posteriori LLR;
• determines the difference between the first a posteriori LLR and the first LLR to form a first extrinsic LLR;
• determines the difference between the second a posteriori LLR and the third LLR to form a second extrinsic LLR;
• updates the first mean value and the first variance value based on the first extrinsic LLR;
• and
• updates the third mean value and the third variance value based on the second extrinsic LLR,
• wherein the first interleaver, the second interleaver, the third interleaver, and the fourth interleaver are different.