利索-全球专利检索

  1. Login
  2. Sign Up
Invention Publication
CN107005514A 通过使用更好的相关性模型改善用于估计频偏的卡亨南‑洛维算法 无效 - 撤回

  • Patent Title: 通过使用更好的相关性模型改善用于估计频偏的卡亨南‑洛维算法
  • Patent Title (English): Improvement of karhunen-loeve algorithm for estimating frequency offset by use of a better correlation model
  • Application No.: CN201480083574.8
    Application Date: 2014-12-15
  • Publication No.: CN107005514A
    Publication Date: 2017-08-01
  • Inventor: 弗雷德里克·鲁塞克
  • Applicant: 华为技术有限公司
  • Applicant Address: 广东省深圳市龙岗区坂田华为总部办公楼
  • Assignee: 华为技术有限公司
  • Current Assignee: 华为技术有限公司
  • Current Assignee Address: 广东省深圳市龙岗区坂田华为总部办公楼
  • International Application: PCT/EP2014/077781 2014.12.15
  • International Announcement: WO2016/095947 EN 2016.06.23
  • Date entered country: 2017-05-22
  • Main IPC: H04L27/26
  • IPC: H04L27/26
通过使用更好的相关性模型改善用于估计频偏的卡亨南‑洛维算法
Abstract:
一种接收器(120)和一种所述接收器(120)中的方法(500)，用于基于正交频分复用OFDM估计无线通信系统(100)中发射器(110)和所述接收器(120)之间的归一化频率偏移。所述方法(400)包括从所述发射器(110)接收(401)第一导频信号yr1和第二导频信号yr2；基于在所述第一导频信号yr1和所述第二导频信号yr2处所涉及的子载波信道之间的相关性，确定(402)待应用的相关性模型；基于所述所确定的(402)相关性模型，通过对数‑似然函数λ(ε)的复扩展来计算(403)三个复杂值μ‑1、μ0和μ1；以及基于所述计算出的(403)三个复杂值μ‑1、μ0和μ1，通过找到所述对数‑似然函数λ(ε)的卡亨南‑洛维近似的最大值来估计(404)所述频率偏移值ε。
Abstract(English):

Receiver (120) and method (500) in a receiver (120), for estimating a normalised frequency offset between a transmitter (110) and the receiver (120) in a wireless communication system (100), based on Orthogonal Frequency Division Multiplexing (OFDM). The method (400) comprises receiving (401) a first pilot signal (yr1) and a second pilot signal (yr2), from the transmitter (110); determining (402) a correlation model to be applied based on correlation among involved sub-carrier channels at the first pilot signal (yr1) and the second pilot signal (yr2); computing (403) three complex values [mu]-1, [mu]0, and [mu]1, by a complex extension of a log-likelihood function [lambda]([epsilon]), based on the determined (402) correlation model; and estimating (404) the frequency offset value ([epsilon]) by finding a maximum value of a Karhunen-Loeve approximation of the log-likelihood function [lambda] ([epsilon]), based on the computed (403) three complex values [mu]-1, [mu]0, and [mu]1.

Patent Agency Ranking
0/0