公开(公告)号：EP1876782A1

公开(公告)日：2008-01-09

申请号：EP06013716.3

申请日：2006-07-03

Applicant: STMicroelectronics Belgium N.V.

Inventor： Wernaers, Yves

IPC: H04L27/26

CPC classification number: H04L27/2614

Abstract: A multicarrier transmission system uses a set of carriers spaced apart in frequency with a number of bits being assigned to each carrier. A transmitter (3) has a mapper (14) which maps a data signal to a parallel set of constellation values. A frequency domain-to-time domain transform stage (18) converts the set of modulated carriers to a time-domain signal. A peak detector detects when the time-domain signal exceeds a predetermined criterion. A constellation modifier (27) modifies the constellation value of at least one of the carriers to reduce the crest factor of the transmitted signal. A carrier is selected for modifying on the basis of a number of bits allocated to that carrier. The constellation modifier (27) can select an alternative constellation value by an iterative method or by calculation. The constellation modifier (27) can operate entirely in the time-domain.

Abstract translation: 多载波传输系统使用频率间隔开的一组载波，其中多个比特被分配给每个载波。 发射机（3）具有映射器（14），其将数据信号映射为并行星座值集。 频域到时域变换级（18）将该组调制载波转换为时域信号。 峰值检测器检测时域信号何时超过预定标准。 星座修改器（27）修改至少一个载波的星座值以减小发送信号的波峰因数。 根据分配给该载波的多个比特选择一个载波进行修改。 星座修改器（27）可以通过迭代方法或通过计算来选择替代星座值。 星座修改器（27）可以完全在时域中操作。

公开(公告)号：EP1876782B1

公开(公告)日：2010-03-31

申请号：EP06013716.3

申请日：2006-07-03

Applicant: STMicroelectronics Belgium N.V.

Inventor： Wernaers, Yves

IPC: H04L27/26

CPC classification number: H04L27/2614

公开(公告)号：EP2146470A1

公开(公告)日：2010-01-20

申请号：EP08160469.6

申请日：2008-07-15

Applicant: STMicroelectronics Belgium N.V.

Inventor： Wernaers, Yves

IPC: H04L25/03 ,  H04L27/26

CPC classification number: H04L27/2647 ,  H04L25/03133

Abstract: In mobile, wireless communication systems the channel between the transmitter and receiver varies during a transmission. This is often referred to as fading, of which different kinds exist. Each resulting in different impairments with specific properties.
A low complexity scheme is described to reduce the noise created by inter-carrier interference or ICI. The method makes use of the guard interval and first order Taylor approximation of slow varying channel. It is not restricted to wireless communication and can be used in any environment with varying channels.

Abstract translation: 在移动，无线通信系统中，发射机和接收机之间的信道在传输过程中发生变化。 这通常被称为衰落，其中存在不同的种类。 每个产生具有特定性质的不同损伤。 描述低复杂度方案以减少由载波间干扰或ICI产生的噪声。 该方法利用缓慢变化信道的保护间隔和一阶泰勒近似。 它不限于无线通信，并且可以在具有不同信道的任何环境中使用。

公开(公告)号：EP1531590A1

公开(公告)日：2005-05-18

申请号：EP03078544.8

申请日：2003-11-11

Applicant: STMicroelectronics Belgium N.V.

Inventor： Wernaers, Yves

IPC: H04L25/02 ,  H04L25/03

CPC classification number: H04L25/0216 ,  H04L25/022 ,  H04L25/0224 ,  H04L25/024 ,  H04L25/03292 ,  H04L2025/03414 ,  H04L2025/03585

Abstract: An aspect of the present invention is the use of two criteria in channel estimation, e.g. a value related to the length of an estimated Channel Impulse Response ( CIR ) and a value related to a noise content of the received signal, e.g. a Signal-to-Noise Ratio ( SNR ). These parameters can be used for the post-processing algorithm. An advantage of the present invention is that it is much more robust against long channels and/or high noise contents in received signals. Additionally it has moderate implementation complexity.

Abstract translation: 本发明的一个方面是在信道估计中使用的两个标准，E.G. 相关的估计信道脉冲响应（CIR）的长度的值和与所接收的信号的噪声内容的值，例如 一个信噪比（SNR）。 这些参数可用于后处理算法。 本发明的一个优点是没有它是对长信道和/或高的噪声内容在接收到的信号更健壮。 此外，它具有适度的实现复杂度。