![通信同步过程中存在定时误差的整数倍频偏估计方法](/CN/2008/1/48/images/200810243727.jpg)
基本信息:
- 专利标题: 通信同步过程中存在定时误差的整数倍频偏估计方法
- 专利标题(英):Method for estimating integer multiple frequency deviation with timing error during communication synchronization process
- 申请号:CN200810243727.7 申请日:2008-12-12
- 公开(公告)号:CN101437005B 公开(公告)日:2012-11-14
- 发明人: 王金龙 , 张玉明 , 吴启晖 , 沈良 , 任国春
- 申请人: 中国人民解放军理工大学通信工程学院
- 申请人地址: 江苏省南京市御道街标营2号
- 专利权人: 中国人民解放军理工大学通信工程学院
- 当前专利权人: 中国人民解放军理工大学通信工程学院
- 当前专利权人地址: 江苏省南京市御道街标营2号
- 代理机构: 南京天华专利代理有限责任公司
- 代理人: 夏平
- 主分类号: H04L27/00
- IPC分类号: H04L27/00 ; H04L27/26
The invention provides a method for estimating integer frequency offset with timing error during the communication synchronization, which comprises the following steps: a constant-amplitude Chu sequence with ideal autocorrelation characteristics is selected as a frequency domain difference sequence C(k), a first element S(0) in a frequency domain training sequence is defined to be equal to 1, the frequency domain training sequence S(k) with a length of N is obtained according to the recursion formula S(k)=C(k-1)S(k-1), and the S(k) is transformed into a time domain training sequence s(n) through an IFFT; after a receiving sequence finishes the fractional frequency offset compensation, two sections of receiving sequences with a length of N are taken out according to a coarse timing sequence, and two sections of receiving sequences are added to obtain a receiving sequence r(n) with a length of N; the frequency domain of the sequence r(n) is transformed into R(k) through FFT, the formula D(k)=R(k+1)(R(k))* is utilized to calculate a receiving frequency domain difference sequence D(k), the cyclic shift correlation is performed through the conjugation of the received sequence D(k) and the sequence C(k), and a related peak value corresponds to the integer frequency offset estimation epsilon int of a system, as shown in the right formula. The method strengthens the frequency offset estimation performance and improves the transmission efficiency of the system on the premise of not affecting the timing synchronous performance.
公开/授权文献:
- CN101437005A 通信同步过程中存在定时误差的整数倍频偏估计方法 公开/授权日:2009-05-20