LOW COMPLEXITY PRECODING DEVICE BASED ON VECTOR PERTURBATION IN A MULTI USER MULTI ANTENNA COMMUNICATION SYSTEM, CAPABLE OF REMOVING INTER-USER INTERFERENCE BY APPLYING A REPEAT TREE SEARCH TECHNOLOGY TO A TRANSMITTING TERMINAL

摘要

PURPOSE: A low complexity precoding device based on vector perturbation in a multi user multi antenna communication system is provided to obtain low complexity and similar performance.;CONSTITUTION: A reference value of a cumulative branch metric of a candidate symbol is determined(S1). A candidate having a cumulative branch metric value is removed. The cumulative branch metric value exceeds the reference value of a cumulative branch metric value of a determined candidate symbol. The cumulative branch metric value of the candidate symbol is registered as entry(S2). The cumulative branch metric value of the candidate symbol does not exceed the reference value of a cumulative branch metric value of the candidate symbol. A cumulative branch metric value of the smallest candidate symbol among cumulative branch metric values registered as entry is selected(S3).;COPYRIGHT KIPO 2010