公开(公告)号：EP2330784A1

公开(公告)日：2011-06-08

申请号：EP10192406.6

申请日：2010-11-24

Applicant: Dora S.p.A.

Inventor： Dell'Amico, Gabriele ,  Guerrini, Eleonora

IPC: H04L25/02 ,  H04L27/26

CPC classification number: H04L25/022 ,  H04L25/0224 ,  H04L27/2647 ,  H04L27/2655 ,  H04L27/2679

Abstract: An OFDM receiver includes a sampling circuit configured to sample an incoming signal received through a transmission channel and an estimation circuit configured to receive samples of the incoming signal and to estimate transmission channel response and eventual differences of synchronization offsets introduced at a receiver side. An equalizer may be coupled to the estimation circuit and configured to compensate an effect of the transmission channel response and of the differences of synchronization offsets on the received samples and to generate equalized samples. An OFDM detector may be configured to generate a stream of demodulated digital symbols based upon the equalized samples.

Abstract translation: OFDM接收机包括：采样电路，以样品被配置为经由传输信道与在被配置成接收输入信号的样本，并估算传输信道响应和在接收机侧导入的同步偏移的最终差异估计电路接收的输入信号。 均衡器可被耦合到所述估计电路并且被配置为补偿在传输信道响应的影响，同步偏移的所接收样本的差异，以产生均衡的样本。 的OFDM检测器可以被配置成基于经均衡的样本解调的数字符号流。

公开(公告)号：EP2458769B1

公开(公告)日：2013-08-21

申请号：EP11190986.7

申请日：2011-11-28

Applicant: Dora S.p.A.

Inventor： Guerrini, Eleonora

IPC: H04L1/00 ,  H04L5/00 ,  H04L27/38 ,  H04L27/26 ,  H04L27/00

CPC classification number: H04L27/2647 ,  H04L1/0066 ,  H04L5/0046 ,  H04L27/0008 ,  H04L27/0012 ,  H04L27/38

公开(公告)号：EP2458769A1

公开(公告)日：2012-05-30

申请号：EP11190986.7

申请日：2011-11-28

Applicant: Dora S.p.A.

Inventor： Guerrini, Eleonora

IPC: H04L5/00

CPC classification number: H04L27/2647 ,  H04L1/0066 ,  H04L5/0046 ,  H04L27/0008 ,  H04L27/0012 ,  H04L27/38

Abstract: A method of transmitting symbols of a digital transmission constellation from a set thereof, ordered from a smallest to a greatest number of bits per symbol, may include identifying a first constellation from the set that is configured to communicate with a threshold error rate and has a greatest signal-to-noise ratio smaller than a signal-to-noise ratio of a received signal. The method may also include identifying a second constellation from the set that corresponds to a constellation with a number of bits per symbol immediately greater than the first constellation. The method may further include determining first and second probabilities of use of the first and second constellation that would generate an expected number of erroneous bits corresponding to the threshold error rate. The method may further include transmitting a symbol with a constellation selected randomly between the first and second constellation according to the first and second probabilities, respectively.

Abstract translation: 从每个符号的从最小位数到最大位数排列的数字传输星座的符号的传输方法可以包括从被配置为与阈值错误率进行通信的集合中识别第一星座，并且具有 最大的信噪比小于接收信号的信噪比。 该方法还可以包括从对应于具有立即大于第一星座的每个符号的比特数的星座的集合识别第二星座图。 该方法可以进一步包括确定使用第一和第二星座的第一和第二概率，其将产生对应于阈值错误率的预期数量的错误比特。 该方法还可以包括分别根据第一和第二概率发送具有在第一和第二星座之间随机选择的星座的符号。

公开(公告)号：EP2202906A1

公开(公告)日：2010-06-30

申请号：EP09180214.0

申请日：2009-12-21

Applicant: Dora S.p.A.

Inventor： Bisaglia, Paola ,  Bois, Simone ,  Guerrini, Eleonora

IPC: H04L1/20 ,  H04L27/233

CPC classification number: H04L27/2331 ,  H04B17/309 ,  H04L1/206

Abstract: There is described a method for estimating the signal-to-noise ratio for a packet transmission and reception system of signals with a known sequence, with M-DPSK modulation. The method comprises the division of N known symbols ( a k ) and of N samples of the received signal ( r ( t )) at the output of the channel into B blocks of L length with B and L positive integer numbers and B greater than one and wherein B is expressed by B = N - L L - O + 1 ≥ N L wherein O indicates the overlapping factor of consecutive blocks having length L and the calculation of the estimation of the signal-to-noise ratio by means of the equation: SNR = L - 1 B ⋅ L ∑ b = 0 B - 1 1 L ∑ k = l b l b + L - 1 r k ⁢ a k * 2 1 B ∑ b = 0 B - 1 1 L ∑ k = l b l b + L - 1 r k 2 - 1 B ∑ b = 0 B - 1 1 L ∑ k = l b l b + L - 1 r k ⁢ a k * 2 - 1 L wherein l b = b • (L - O) + l where l is the index denoting the position of the first known symbol of the sequence of length N in the packet, r k is the sample of the received signal at the output of the channel correspondent to the known transmitted symbol, a k is the M-DPSK modulated known transmitted symbol, a * k is the complex conjugated of the M-DPSK modulated known transmitted symbol and SNR indicates the estimation of the signal-to-noise ratio.

Abstract translation: 描述了一种用于估计信噪比用于信号的分组发送和接收系统具有已知序列，用M-DPSK调制的方法。 该方法包括和输出处的信道的与B和L的正整数和B长度L的B嵌段所接收信号的N个样本（R（T））的N个已知的符号（AK）的分割大于一 和worin B由乙过表达= N - LL - O + 1‰¥NL worin O表示连续块具有长度L，并且由公式的装置信噪比的估计的计算重叠因子： SNR = L - 1乙