Iterative detection and decoding apparatus and method in MIMO system

An iterative detection and decoding method in a Multiple Input Multiple Output (MIMO) system, comprising the steps of:

• generating soft decision values by performing a detection of an entire set of MIMO nodes;
• decoding a first decoding station using the generated soft decision values to produce a first decoding value;
• re-generating soft decision values by performing a redetection of a first MIMO node, from the set of MIMO nodes, that corresponds to the first decoding station, when it is determined that there is a soft decision value that does not satisfy a parity equation by using a parity bit contained in a received signal;
• decoding a second decoding station using at least one of the generated soft decision values and the re-generated soft decision values to produce a second decoding value;
• and
• re-generating soft decision values by performing a redetection of a second MIMO node, from the set of MIMO nodes, that corresponds to the second decoding station when it is determined that there is a soft decision value that does not satisfy a parity equation by using a parity bit contained in the received signal;
• wherein the decoding step and the re-generating step are performed a number of times equal to a total number of decoding stations and the number of decoding and regenerating steps are iterated at least one time.

An iterative detection and decoding apparatus in a Multiple Input Multiple Output (MIMO) system, comprising:

• a detector for generating soft decision values by detecting an entire set of MIMO nodes of signals received through antennas;
• a decoder for decoding a decoding station using the generated soft decision values to produce a decoding value and providing the detector with the decoded decoding value;
• and
• a reliability determiner for determining reliability of the decoded decoding value by checking a variation between the decoding value and a corresponding one of the generated soft decision values;
• wherein the detector re-generates soft decision values by redetecting a MIMO node, from the entire set of MIMO nodes, that corresponds to the decoding station when the variation is greater than a reference value;
• wherein, when there is a next decoding station, the decoder decodes the next decoding station using at least one of the re-generated soft decision values and the generated soft decision values to produce a next decoding value;
• wherein the decoding step and the re-generating step are performed a number of times equal to a total number of decoding stations and the number of decoding and regenerating steps are iterated at least one time.

An iterative detection and decoding apparatus in a Multiple Input Multiple Output (MIMO) system, comprising:

• a detector for generating soft decision values by detecting an entire set of MIMO nodes of signals received through antennas;
• a decoder for decoding a decoding station using the generated soft decision values to produce a decoding value and providing the detector with the decoded decoding value;
• and
• a reliability determiner for determining reliability of the decoded decoding value by determining if there is a soft decision value that does not satisfy a parity equation by using a parity bit contained in the received signal;
• wherein the detector re-generates soft decision values by redetecting a MIMO node, from the entire set of MIMO nodes, that corresponds to the decoding station when there is the soft decision value that does not satisfy the parity equation;
• wherein, when there is a next decoding station, the decoder decodes the next decoding station using at least one of the re-generated soft decision values and the generated soft decision values to produce a next decoding value;
• wherein the decoding step and the re-generating step are performed a number of times equal to a total number of decoding stations and the number of decoding and regenerating steps are iterated at least one time.