Detecting apparatus and method in mimo system

A detecting method in a Multiple Input Multiple Output (MIMO) system, where M different symbols are transmitted between a transmitter and a receiver through multiple antennas, and M is a natural number, comprising the steps of:

• a) performing a first detection of a received signal based on a first detection algorithm having a small computation amount, to thereby generate a decoded vector;
• b) calculating an instantaneous signal-to-interference plus noise ratio (SINR) value for each element of the decoded vector detected in the step a);
• c) determining elements having the instantaneous SINR value equal to or greater than a threshold value as a candidate elements to be used for estimating a transmission data based on the decoded vector by comparing the calculated instantaneous SINR value and the threshold value;
• d) generating a signal with respect to the candidate elements determined in the step c) and outputting a modified signal by subtracting the signal from the received signal;
• and
• e) performing a second detection of the modified signal based on a more precise second detection algorithm than the first detection algorithm.

A detecting method in a Multiple Input Multiple Output (MIMO) system, where M different symbols are transmitted between a transmitter and a receiver through multiple antennas, and M is a natural number, comprising:

• a) performing a first detection of a received signal based on a first detection algorithm having a small computation amount, to thereby generate a decoded vector;
• b) calculating an instantaneous signal-to-interference plus noise ratio (SINR) for each element of the decoded vector detected in the step a);
• c) determining elements having the instantaneous SINR value equal to or smaller than a threshold value as a candidate elements to be used for estimating a transmission data based on the decoded vector by comparing the calculated instantaneous SINR value and the threshold value;
• d) generating a signal with respect to the candidate elements determined in the step c) and outputting a modified signal by subtracting the signal from the received signal;
• and
• e) performing a second detection of the modified signal based on a more precise second detection algorithm than the first detection algorithm.