西安电子科技大学学报(自然科学版)
西安電子科技大學學報(自然科學版)
서안전자과기대학학보(자연과학판)
Journal of Xidian University (Natural Science)
2015年
5期
1-6,32
,共7页
多用户%多输入多输出%减格%预编码
多用戶%多輸入多輸齣%減格%預編碼
다용호%다수입다수출%감격%예편마
multiuser%multiple input multiple output%lattice reduction%precoding
针对减格预编码算法复杂度较高的问题,提出了一种基于正交缺陷门限的低复杂度减格预编码算法。通过引入正交缺陷门限作为提前中止减格算法的条件,并对信道矩阵进行预排序来提高提前中止概率,有效降低了减格算法的复杂度。此外,为了获得预编码性能复杂度的折中,提出了一种功率损失因子(Power Loss Factor ,PLF)来优化正交缺陷门限值。仿真结果表明,该算法能够显著降低减格预编码算法的复杂度,而误码率性能近似传统减格预编码算法。
針對減格預編碼算法複雜度較高的問題,提齣瞭一種基于正交缺陷門限的低複雜度減格預編碼算法。通過引入正交缺陷門限作為提前中止減格算法的條件,併對信道矩陣進行預排序來提高提前中止概率,有效降低瞭減格算法的複雜度。此外,為瞭穫得預編碼性能複雜度的摺中,提齣瞭一種功率損失因子(Power Loss Factor ,PLF)來優化正交缺陷門限值。倣真結果錶明,該算法能夠顯著降低減格預編碼算法的複雜度,而誤碼率性能近似傳統減格預編碼算法。
침대감격예편마산법복잡도교고적문제,제출료일충기우정교결함문한적저복잡도감격예편마산법。통과인입정교결함문한작위제전중지감격산법적조건,병대신도구진진행예배서래제고제전중지개솔,유효강저료감격산법적복잡도。차외,위료획득예편마성능복잡도적절중,제출료일충공솔손실인자(Power Loss Factor ,PLF)래우화정교결함문한치。방진결과표명,해산법능구현저강저감격예편마산법적복잡도,이오마솔성능근사전통감격예편마산법。
To reduce the complexity of lattice reduction aided ( LRA ) precoding , a low complexity LRA precoding based on the orthogonality defect threshold is proposed . We introduce the orthogonality defect (od) threshold as an early‐termination condition into the lattice reduction (LR) algorithm which can reduce computational complexity by adaptively early terminating the LR processing . And , sorted QR decomposition of the channel matrix is used to enhance the probability of the early termination which further reduces computational complexity . Moreover , to achieve a favorable tradeoff between performance and complexity , we define a power loss factor ( PLF) to optimize the od threshold . Simulation results show that the proposed algorithm can achieve significant complexity savings with nearly the same bit‐error‐rate (BER) performance as the traditional LRA precoding algorithm .