| 摘要: |
| 针对单中继多用户多输入多输出(MIMO)通信系统中用户间干扰问题，提出了一种可以有效抑
制用户
间干扰的中继接收和预编码方案。该方案在中继端对信号进行迫零（ZF）接收，利用最大化
信漏噪比（SLNR）准则设计中继端预编码向量，并针对难以获得最优解的情况，利用迭代解
出次优解。仿真结果表明，与中继端ZF预编码相比， SLNR预编码更好地抑制了用户间干扰
，相同和速率性能下，基站发送端功率比ZF预编码减少4 dB，具有实用价值。 |
| 关键词: 多输入多输出 单中继多用户 迫零接收 迫零预编码 干扰抑制 |
| DOI：doi:10.3969/j.issn.1001-893x.2013.06.015 |
|
| 基金项目:国家科技重大专项（2011ZX03003-001-02）；国家自然科学基金资助项目（61071113）；福建省自然科学基金资助项目（2011J05152）；厦门市科技计划项目（3502Z20123035）;福建省科技创新平台建设项目(2012H2002) |
|
| A new relay precoding scheme for single relay multi-user MIMO system |
| LI Xiao-xiao,ZHAO Rui |
| () |
| Abstract: |
| In the single relay multi-user multi-input multi-output(MIMO) system,
in order to overcome the inter-user interference, a new relay processing schem
e which can be used to effectively suppress the inter-user interference is propo
sed in this paper. Firstly, the relay receives the signal by zero forcing（ZF）f
iltering. Secondly, the relay precoding vector is designed by using the signal-
to-leakage-noise ratio(SLNR) max
imization criterion, where a suboptimal relay precoding design is proposed since
it is difficult to obtain the optimal relay precoding vector. The simulation re
sults show that the new scheme can effectively suppress the inter-user interfer
ence in comparison with the relay terminal zero-forcing precoding, and at the sa
me sum-rate, the power of the base stationis reduces more than 4 dB. So the prop
osed scheme is applicable. |
| Key words: MIMO single relay multi-user ZF receive ZF precoding interference suppression |
《电讯技术》编辑部 