摘要:
A method for calculation of path weights for the equalization of a data signal that is transmitted via a data channel whose power is regulated in a RAKE receiver is disclosed. In the method, at least one uncorrected path weight is calculated for the data signal that is transmitted via the data channel, using channel estimation results that have been obtained on the basis of a common pilot channel. The uncorrected path weight is corrected by multiplying it by a correction factor that contains a ratio of a data-channel-specific gain estimation to a pilot-channel-based gain estimation.
摘要:
In a method for variable weighting of channel coefficients for a RAKE receiver, at least one variable that is characteristic of a transmitter and/or transmission channel and/or receiver characteristic is assessed. A correction factor is determined, which is dependent on the assessment result. The channel coefficients are multiplied by the correction factor, and the corrected channel coefficients are used as the basis for equalization in the RAKE receiver.
摘要:
The invention relates to a device for calculating FSM bits by means of which the signals sent from two antennas of a base station are influenced with reference to their phase difference and/or their amplitudes. The FSM bits are calculated with the aid of two estimated channel impulse responses. The device is present in hard-wired form.
摘要:
A method for calculation of path weights for the equalization of a data signal, that is transmitted via a data channel whose power is regulated, in a RAKE receiver is disclosed. In the method, a path weight is calculated for the data signal that is transmitted via the data channel whose power is regulated and a correction factor is calculated for the path weight. The correction factor includes a ratio of the data-channel-specific gain to the pilot-channel-based gain, and the selection of the common pilot symbols that are used for this purpose depending on the receiver velocity or the time slot format.
摘要:
In the method, the received spread-coded signal sequence rk(i) is first of all correlated with the spread-coded training symbol sequence in a correlator (24) so as to counteract the influence of the transmitted training symbols. The signal sequence which results from the correlation process is then despread in a despreading apparatus (21, 22). The despread signal sequence is integrated over a number (N_MF) of signal values, with the number (N_MF) being set as a function of the channel dynamic range (λ). The sequence of data symbols produced in this way is filtered with fixed or variable filter coefficients in a digital filter (25) in order to produce channel estimation values ({tilde over (H)}(l)).
摘要:
In a method for generating a reduced-noise signal sequence {{circumflex over (t)}i} from a noisy signal sequence {uj} comprising values uj which are characteristic of the temporal position of crossings of a noisy angle-modulated signal through a threshold value, a decision is made (102) as to whether a value {circumflex over (t)}i of the reduced-noise signal sequence is to be generated for the value uj. If this is the case, the value {circumflex over (t)}i is calculated taking into account earlier values uj of the noisy signal sequence for which no values of the reduced-noise signal sequence {{circumflex over (t)}i} were generated.
摘要翻译:在一种用于从包括值u> j的噪声信号序列(u j j>)生成降噪噪声信号序列的方法中, 是通过阈值对噪声角度调制信号的交叉的时间位置的特征,做出(102)关于减小噪声信号序列的值t i i是否为 被生成为值u SUB>。 如果是这种情况,则考虑到没有减小噪声信号序列的值的噪声信号序列的较早的值u N i N,计算值t i i, 生成了 i> 。
摘要:
Apparatus for demodulation of a signal which is frequency-modulated with a data symbol sequence {dk}, having a zero crossing detector (1), a generator (2) for production of a sequence {zi}, with zi being calculated from zero crossings ti and ti+1, and having a unit (3) for reconstruction of the data symbol sequence {dk}, which is characterized by a minimum Euclidean distance between the sequence {zi} and an auxiliary sequence, with each sequence element in the auxiliary sequence being formed from convolution of the data symbol sequence {dk} with a sequence {hi,k} relating to the index k, and with the sequences {hi,k} being functions of the times ti.
摘要翻译:用于解调用具有过零检测器(1)的数据符号序列(d)进行频率调制的信号的装置,用于产生序列{z < 其中z i是从零交叉t i和i i + 1 i计算的,并且具有单位 (3),用于重建数据符号序列{d> k N},其特征在于序列{z> i i}与辅助序列之间的最小欧几里德距离,其中, 辅助序列中的每个序列元素由数据符号序列{d> k N}与与索引k相关的序列{h i,i,k}卷积形成,以及 其中序列{h i,i,k i}是时间t i i i的函数。
摘要:
A detector for zero crossings determines the zero crossings in the received signal or in an intermediate frequency signal which is generated from the received signal. Since, in the case of frequency-modulated signals, the number of zero crossings per symbol interval is naturally not constant, the zero crossing sequence is mapped to a sequence {zi} of parameter values zi which are at equidistant time intervals by means of mathematical, non-linear mapping. Mean value formation of zero crossing intervals or determination of the number of zero crossings can be used for mapping. The sequence of parameter values zi at equidistant time intervals can be supplied to a conventional detection algorithm such as a Viterbi detection algorithm.
摘要:
The possible number of zero crossings in the interval [kTb,(k+1)Tb] is determined for each time (k+1)Tb based on hypothetical subsequences, on the basis of a model for frequency modulation, and a trellis diagram is constructed, based on the model. In a first selection step, those paths in the trellis diagram are then excluded whose number of zero crossings in the stated interval does not match the number of detected zero crossings in the received subsequence in this interval. In a second selection step, the path metrics of the paths which still exist are extended by the new branch metrics based on the Viterbi algorithm which is known per se. If two paths meet one another at a node point then only that path which has the lower path metric is continued.
摘要:
A method for calculating zero-crossing reference sequences ({ti}) for the data detection of a sequence of zero crossings ({{circumflex over (t)}i}) of a received signal is disclosed. The data detection is determined in a receiver, wherein the received signal is based on a data symbol sequence ({dk}) angle-modulated at a transmitter and transmitted to the receiver. The zero-crossing reference sequences ({ti}) are calculated in accordance with an equation specifying an output of a finite state machine that describes, at least approximately, the signal generation in the transmitter.
摘要翻译:一种用于计算接收信号的过零序列((t))的数据检测的过零参考序列({t i i i>})的方法是 披露 在接收机中确定数据检测,其中所接收的信号基于在发射机处角度调制并被发送到接收机的数据符号序列({d> k N}})。 根据规定至少近似地描述发射机中的信号产生的有限状态机的输出的等式来计算过零参考序列({t i i i>})。