Joint Estimation of Carrier and Sampling Frequency Offsets in the Uplink of Multiuser OFDM Systems
作者: Xu WangTao YangBo Hu
作者单位: 1Fudan University
刊名: Wireless Personal Communications, 2017, Vol.97 (3), pp.3831-3845
来源数据库: Springer Nature Journal
DOI: 10.1007/s11277-017-4701-6
关键词: OFDMMultiuserCarrier frequency offsetSampling frequency offset
英文摘要: This paper considers the joint estimation of the carrier frequency offset (CFO) and sampling frequency offset (SFO) in the uplink of multiuser orthogonal frequency division multiplexing systems, where the received signal at the base station is a mixture of all users’ signals and each user is affected by different frequency offsets. Usually, users’ separation is needed to cope with this challenging multi-parameter estimation problem. Conventional methods adopt the zero-forcing criterion, which will lead to noise enhancement. To overcome this problem, a novel joint CFO and SFO estimation algorithm is proposed. We use the QR decomposition to achieve users’ separation, and the successive interference cancellation technique is employed to estimate the frequency offsets of different users. To...
原始语种摘要: This paper considers the joint estimation of the carrier frequency offset (CFO) and sampling frequency offset (SFO) in the uplink of multiuser orthogonal frequency division multiplexing systems, where the received signal at the base station is a mixture of all users’ signals and each user is affected by different frequency offsets. Usually, users’ separation is needed to cope with this challenging multi-parameter estimation problem. Conventional methods adopt the zero-forcing criterion, which will lead to noise enhancement. To overcome this problem, a novel joint CFO and SFO estimation algorithm is proposed. We use the QR decomposition to achieve users’ separation, and the successive interference cancellation technique is employed to estimate the frequency offsets of different users. To...
全文获取路径: Springer Nature  (合作)
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来源刊物:
影响因子:0.428 (2012)

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关键词翻译
关键词翻译
  • Sampling 取样
  • problem 题目
  • Carrier 运载工具
  • CFO Complex Facility Operator
  • estimate 估计
  • decomposition 分解
  • unbiased 不偏性
  • variance 离散
  • criterion 准则
  • offset 支脉