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总览 评价 孔雪刚 , 高锦春 * ( 北京邮电大学泛网无线通信教育部重点实验室; ) 摘要: 针对运用MIMO波束成形技术的认知无线电网络提出一种新的发送预编码算法和两种频谱共享算法,综合利用了信道信息和主系统的发送预编码向量和接收滤波向量的信息,在无
孔雪刚, 高锦春*
(
北京邮电大学泛网无线通信教育部重点实验室; )
摘要:
针对运用MIMO波束成形技术的认知无线电网络提出一种新的发送预编码算法和两种频谱共享算法,综合利用了信道信息和主系统的发送预编码向量和接收滤波向量的信息,在无频谱空闲时从系统实现频谱共享。相比于传统的联合频谱共享算法,两种改进算法的认知系统吞吐率大大提高。提出的CBS遍历法效果最好但运算复杂度相对较高,随机法的效果较CBS遍历法稍差,但运算复杂度很低。最后又将所有的算法都推广到了多用户的场景中。
关键词:
认知无线电;MIMO;波束成形;发送预编码;遍历法;随机法;
KONG Xuegang, GAO Jinchun*
(
Key Lab of Universal Wireless Communications. Ministry of Education, Beijing University of Posts and Telecommunications; )
Abstract:
A new MIMO beamforming based algorithm of precoding and two spectrum sharing algorithms in cognitive radio networks are proposed. By using the information of both the channel and the precoding vector and receiving vector of the primary system, this algorithm can carry out spectrum sharing under the condition that no idle spectrum resource is available. Compared with tradition joint spectrum sharing, two proposed algorithms could improve the system throughput greatly. In the two proposed algorithms, the CBS traversal algorithm could achieve optimal throughput with high complexity, while the random algorithm has suboptimal throughput with low complexity. In the end, all algotithms are extend to muti-user scenario.
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