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    • 4. 发明申请
    • Modular device for multiple reception of a modulated signal
    • 用于多次接收调制信号的模块化设备
    • US20060013346A1
    • 2006-01-19
    • US10504448
    • 2003-02-07
    • Khaled MaalejEmmanuel HammanJean-Philippe SibersGerard Pousset
    • Khaled MaalejEmmanuel HammanJean-Philippe SibersGerard Pousset
    • H04L1/02
    • H04L27/2601H04B7/0845H04B7/0857H04L27/2647
    • The invention relates to a reception device comprising a number of reception paths (1 to N) and a decoder (30) with weighted inputs. Each reception path (1to N) receives an input of a data stream, corresponding to a modulated signal and embodied to provide a confidence index (CSIi) and an equalized data stream (Zi) from the received data stream. Said device is characterised in that the reception paths (1 to N) comprises a calculation module (24i) embodied to deliver a combined confidence index (CCSIi) and a combined data stream (CZi), from said confidence index (CSIi) and said equalised data stream (CZi) for the preceding path. The decoder (30) with weighted inputs is embodied to only process the combined confidence index (CCSIi) and the combined data stream (CZi), provided by the calculation module (24N) in the last path (N). The above particularly finds application in the reception of multi-channel signals for hertzian digital television.
    • 本发明涉及包括多个接收路径(1至N)和具有加权输入的解码器(30)的接收设备。 每个接收路径(1至N)接收与调制信号相对应的数据流的输入,并体现为从接收的数据流提供置信指数(CSIi)和均衡数据流(Zi)。 所述装置的特征在于,接收路径(1至N)包括计算模块(24i),其被体现为从所述置信度指数(CSIi)和所述信息指标(CSIi)传递组合的置信指数(CCSIi)和组合数据流(CZi) 均衡数据流(CZi)。 具有加权输入的解码器(30)被实现为仅处理由最后路径(N)中的计算模块(24 N)提供的组合的置信指数(CCSIi)和组合数据流(CZi)。 以上特别适用于接收赫兹数字电视的多声道信号。
    • 8. 发明授权
    • Wireless signal amplification system and a television signal decoder comprising one such system
    • 无线信号放大系统和包括一个这样的系统的电视信号解码器
    • US07054604B2
    • 2006-05-30
    • US10481014
    • 2002-05-24
    • Yannick LevyKhaled MaalejEmmanuel HammanAmaury DemolJulien Schmitt
    • Yannick LevyKhaled MaalejEmmanuel HammanAmaury DemolJulien Schmitt
    • H04B1/06
    • H03G3/001H03G3/3068H03M1/185
    • A wireless signal amplification system including amplification apparatus (6) consisting of numerous different amplifiers (61 to 6n) which are distributed in an analogue processing chain (4). Also, a converter (12) for converting analogue signals into digital signals which, at input, are connected to the outlet of the analogue processing chain (4) and, at output, are connected to at least the gain control circuit (16) of the amplification apparatus (6) according to a value that is representative of a characteristic of the wireless signal (1). In this way, sampling of the wireless signal (1) by the converter (12) is optimized. The gain control circuit (16) establishes an average gain control signal (18), and also has, for each of the amplifiers (61 to 6n), a device for calculating an individual gain control signal (20i to 20n) according to a transfer function (H1 to Hn) which is specific to each amplifier and which is applied to the average gain control signal.
    • 一种无线信号放大系统,包括分布在模拟处理链(4)中的多个不同放大器(6 1至6 N n N)组成的放大装置(6)。 另外,一种用于将模拟信号转换成数字信号的转换器(12),该数字信号在输入端连接到模拟处理链(4)的出口,并且在输出端连接至至少一个增益控制电路 所述放大装置(6)根据代表无线信号(1)的特性的值。 以这种方式,优化由转换器(12)对无线信号(1)的采样。 增益控制电路(16)建立平均增益控制信号(18),并且对于每个放大器(6&lt; 1&gt;〜&lt;&gt; n&gt;),设置一个设备 用于根据传递函数(H 1至H n n)来计算单独的增益控制信号(20 20 N < / SUB>),其对于每个放大器是特定的,并且被施加到平均增益控制信号。
    • 10. 发明授权
    • Dual automatic gain control in a QAM demodulator
    • QAM解调器中的双重自动增益控制
    • US6160443A
    • 2000-12-12
    • US396555
    • 1999-09-08
    • Khaled MaalejEmmanuel HammanAmaury DemolYannick Levy
    • Khaled MaalejEmmanuel HammanAmaury DemolYannick Levy
    • H04L1/00H04L7/02H04L27/00H04L27/38H03D3/00H03K9/10
    • H04L1/0071H04L1/0057H04L7/0029H04L7/0058H04L27/3809H04L27/3827H04L27/3872H04L2027/0032H04L2027/0036H04L2027/0038H04L2027/0055H04L2027/0057H04L2027/0071H04L2027/0081
    • A QAM demodulator having a first automatic gain control circuit which outputs a first signal that is a function of the received signal, the first signal being used to control the gain of an amplifier which supplies the input of an A/D converter, and a second automatic gain controller which outputs a second signal derived from the QAM circuit after filtering, the second signal controlling the gain of a digital multiplier which produces a signal which feeds into a equalizer by way of a receive filter. The dual automatic gain control circuits, situated before and after the receive filters, allow for better resistance to non-linearity caused by signals in adjacent channels. Additionally, the dual automatic gain control circuits allow for the amplification level of the signal to be limited before the demodulator to eliminate signal distortion and to be set to the correct level internally with digital gain. Also, there is no saturation of the A/D converter since there is no QAM feedback to analog circuits. This architecture is particularly efficient in a variable rate transmission scheme.
    • 一种具有第一自动增益控制电路的QAM解调器,其输出作为所述接收信号的函数的第一信号,所述第一信号用于控制提供A / D转换器的输入的放大器的增益,以及第二信号 自动增益控制器,其在滤波之后输出从QAM电路得到的第二信号,第二信号控制数字乘法器的增益,该数字乘法器产生通过接收滤波器馈送到均衡器的信号。 位于接收滤波器之前和之后的双自动增益控制电路允许对相邻信道中的信号引起的非线性的更好的抵抗。 此外,双自动增益控制电路允许在解调器之前限制信号的放大电平,以消除信号失真,并在数字增益内部设置为正确的电平。 此外,A / D转换器没有饱和,因为没有对模拟电路的QAM反馈。 这种架构在可变速率传输方案中特别有效。