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    • 5. 发明授权
    • I/Q mismatch compensation in an OFDM receiver in presence of frequency offset
    • 频率偏移存在的OFDM接收机中的I / Q失配补偿
    • US07443783B2
    • 2008-10-28
    • US10504456
    • 2003-02-18
    • Paul DeChampsFrancois BourzeixSebastien Simoens
    • Paul DeChampsFrancois BourzeixSebastien Simoens
    • H04J11/00
    • H04L27/2647H04L2027/0016
    • A receiver for an orthogonal frequency division multiplex radio signal in which a carrier frequency is modulated by sub-carrier signals (S1) coded with data. Analogue signal processing means (3 to 12) produces base-band analogue signals (I-Rx, Q-Rx) in phase quadrature and analogue-to-digital converters (13, 14) convert the analogue signals to phase quadrature digital signals (xI(n), xq(n)). The digital signal processor includes the OFDM demodulator (15) and mismatch compensation (17, 18). The mismatch compensation (17, 18) combines each of the reproduced sub-carrier signals (RI) with a limited number of the reproduced sub-carrier signals (RI-Rk) according to respective frequency offset coefficient (I, k) that is a function of an estimated value of the offset (fc) of the reference frequency relative to the carrier frequency.
    • 一种正交频分复用无线电信号的接收机,其中载波频率由用数据编码的子载波信号(S1)进行调制。 模拟信号处理装置(3至12)在相位正交和模数转换器(13,14)中产生基带模拟信号(I-Rx,Q-Rx),将模拟信号转换成相位正交数字信号(xI (n),xq(n))。 数字信号处理器包括OFDM解调器(15)和失配补偿(17,18)。 不匹配补偿(17,18)根据相应的频率偏移系数(I,k)将再现的副载波信号(RI)和有限数量的再现的副载波信号(RI-Rk)组合, 参考频率相对于载波频率的偏移(fc)的估计值的函数。