摘要
伪随机序列(Pseudo-random Sequence)被广泛应用在通信系统中信道估计、信号加扰和频率跳转等方面。3GPP LTE标准采用Gold序列作为伪随机序列,针对Gold序列生成公式中存在较大状态偏移量以及常规算法生成序列耗时较多等问题,提出了利用状态转移矩阵快速生成序列的优化算法。实验表明,基于TI公司TMS3206455开发测试平台,在生成相同长度序列时,优化算法比常规算法能减少大约17 000多个系统时钟周期,至少节省49%系统资源,对提高系统整体性能有重要意义。
Pseudo-random sequence is widely used in communication systems,such as channel estimation,signal scrambling and frequency hoping. Gold sequences are used as a pseudo- random sequence in 3GPP LTE standards. There is a large state offset in the formula of Gold sequence generation,and it consumes a lot of time when using conventional algorithms. In view of these problems,an optimized algorithm is proposed,which can generate sequences quickly by a state transition matrix. Experiment based on TMS3206455 platform shows that the optimized algorithm can reduce more than 17000 system clock cycles which saves 49% system resources compared with conventional algorithm. So the optimized algorithm is significant to improve the overall system performance.
出处
《电讯技术》
北大核心
2009年第9期37-40,共4页
Telecommunication Engineering
基金
北京市科技新星计划项目(2006B58)
北京市教委科技发展计划项目(KM200710028019)
关键词
3GPPLTE
伪随机序列
状态转移矩阵
序列生成
优化算法
3GPP LTE
pseudo-random sequence
state transition matrix
sequence generation
optimized algorithm
