公开(公告)号：EP1675335A1

公开(公告)日：2006-06-28

申请号：EP04425933.1

申请日：2004-12-21

Applicant: STMicroelectronics S.r.l.

Inventor： Poloni, Angelo ,  Silva, Filippo ,  Valle, Stefano

IPC: H04L25/02

CPC classification number: H04L25/0216 ,  H04L25/0212 ,  H04L27/2601

Abstract: In order to execute, as a function of a received signal (r), a procedure of channel estimation in a transmission channel with memory in a telecommunications system, there is envisaged an operation of estimation of a delay spread associated to said channel, said operation of estimation comprising calculation of a root mean square value (τ rms ) of delay spread by means of a step of evaluation of crossings with a threshold level of a quantity associated to a transfer function of said channel. Said step of evaluation of crossings comprises evaluating a mean number of crossings (λ 0 ) of the real and imaginary parts of said channel transfer function with a threshold level corresponding to the zero level. Preferential application is to OFDM telecommunications systems and in particular wireless systems according to the IEEE 802.11a WLAN standard or the HyperlanII WLAN standard.

Abstract translation: 为了执行，作为接收信号（R），与在电信系统存储器的传输信道的信道估计的过程的功能，有设想到关联于所述信道的延迟扩展的估计的手术，所述操作 根的估计计算的，包括均方根延迟的由交叉的评价与关联到所述信道的传递函数的量的阈值电平的步骤而扩散（均方根）。 交叉的评价的，所述步骤包括评估交叉的平均数目（“0）的所述信道传递函数的与阈值电平的实部和虚部对应于零电平。 优先应用是OFDM电信系统和在特定的无线系统雅丁到的IEEE 802.11a WLAN标准或HyperlanII无线标准。

公开(公告)号：EP1675335B1

公开(公告)日：2007-11-21

申请号：EP04425933.1

申请日：2004-12-21

Applicant: STMicroelectronics S.r.l.

Inventor： Poloni, Angelo ,  Silva, Filippo ,  Valle, Stefano

IPC: H04L25/02

CPC classification number: H04L25/0216 ,  H04L25/0212 ,  H04L27/2601

公开(公告)号：EP2096818A2

公开(公告)日：2009-09-02

申请号：EP09153929.6

申请日：2009-02-27

Applicant: STMicroelectronics S.r.l.

Inventor： Poloni, Angelo

IPC: H04L27/34

CPC classification number: H04L27/34

Abstract: A calibration method for reducing modulation errors in a telecommunication transmitter apparatus includes providing a plurality of pairs of test signals; the test signals of each pair are substantially in quadrature to each other, and the pairs of test signals are at least in part different with all the pairs of test signals that have a substantially equal energy. A plurality of modulated signals are generated, with each modulated signal that is generated by modulating a corresponding pair of test signals. A plurality of transformed signals are calculated, each one corresponding to the square of a corresponding modulated signal in the frequency domain. A plurality of partial error indicators are calculated, each one as a function of the modulus of a corresponding transformed signal. The partial error indicators are indicative of the modulation errors associated with the modulated signals. A compensation for counterbalancing the modulation errors is calculated according to a combination of the partial error indicators and an indication of the compensation is stored for the application of the compensation to each further pair of operative signals during operation of the telecommunication transmitter apparatus.

Abstract translation: 一种用于减少电信发射器设备中的调制误差的校准方法包括：提供多对测试信号; 每对测试信号基本上彼此正交，并且测试信号对与具有基本上相等的能量的所有测试信号对至少部分不同。 生成多个调制信号，每个调制信号通过调制相应的一对测试信号而生成。 计算多个变换信号，每个变换信号对应于频域中相应调制信号的平方。 计算多个部分误差指示符，每个部分误差指示符作为对应的变换信号的模量的函数。 部分误差指示符表示与调制信号相关的调制误差。 根据部分误差指示符的组合计算用于平衡调制误差的补偿，并且存储用于在电信发射机装置的操作期间将补偿应用于每对另一对操作信号的补偿指示。

公开(公告)号：EP2096816A2

公开(公告)日：2009-09-02

申请号：EP09153926.2

申请日：2009-02-27

Applicant: STMicroelectronics S.r.l.

Inventor： Poloni, Angelo ,  Valle, Stefano

IPC: H04L27/20

CPC classification number: H04L27/2032

Abstract: A calibration method and system for reducing modulation errors in a telecommunication transmitter apparatus includes providing a pair of test signals, which are substantially in quadrature to each other, and to repeat an estimation loop. The estimation loop starts with generating a modulated signal by modulating the test signals (the modulation introducing a modulation error) and continues by obtaining a squared signal corresponding to the square of the modulated signal. A transformed signal corresponding to the squared signal in the frequency domain is then calculated. The estimation loop further includes calculating an error indicator, indicative of the modulation error, according to the modulus of the transformed signal. A compensation, to be applied to the test signals for counterbalancing the modulation error, is calculated according to the error indicator and is then applied to the test signals. The estimation loop is repeated until the error indicator reaches a threshold and an indication of the compensation resulting from a last iteration of the estimation loop is stored (for the application of the compensation to each pair of operative signals managed by the telecommunication transmitter apparatus during operation thereof).

Abstract translation: 一种用于减少电信发射机装置中的调制误差的校准方法和系统包括提供一对基本上彼此正交的测试信号，并重复估计环路。 估计循环首先通过调制测试信号（调制引入调制误差）产生调制信号，并通过获得对应于调制信号的平方的平方信号来继续。 然后计算对应于频域中的平方信号的变换信号。 估计环路还包括根据变换信号的模数来计算指示调制误差的误差指示符。 根据误差指标计算出适用于平衡调制误差的测试信号的补偿，然后将其应用于测试信号。 重复估计循环，直到误差指示器达到阈值，并且存储由估计回路的最后一次迭代产生的补偿的指示（对于在操作期间由电信发射机设备管理的每对操作信号对应用补偿） 物）。