Journal of Systems Engineering and Electronics ›› 2010, Vol. 21 ›› Issue (2): 197-203.doi: 10.3969/j.issn.1004-4132.2010.02.005

• ELECTRONICS TECHNOLOGY • Previous Articles     Next Articles

Soft-output stack algorithm with lattice-reduction for MIMO detection

Yuan Yang1,*,Hailin Zhang2,and Junfeng Hu2   

  1. 1.Datang Linktech Infosystem Co,Ltd,Beijing 100083,P.R.China;
    2.State Key Laboratory of ISN,Xidian University,Xi’an 710071,P.R.China
  • Online:2010-04-26 Published:2010-01-03
  • Contact: Yuan Yang

Abstract:

A computationally efficient soft-output detector with
lattice-reduction(LR)for the multiple-input multiple-output(MIMO)
systems is proposed.In the proposed scheme,the sorted QR de-
composition is applied on the lattice-reduced equivalent channel
to obtain the tree structure.With the aid of the boundary control,
the stack algorithm searches a small part of the whole search
tree to generate a handful of candidate lists in the reduced lattice.
The proposed soft-output algorithm achieves near-optimal perfor-
mance in a coded MIMO system and the associated computational
complexity is substantially lower than that of previously proposed
methods.