摘要:
A method for detection of a control channel includes receiving data transmitted via the control channel. A control channel receive quality is estimated based on a metric difference between a metric of a known final trellis state and a minimum metric amongst the metrics of the trellis states based on the received data. It is decided whether or not to detect the control channel depending on the estimated control channel receive quality.
摘要:
A decoding apparatus includes at least one decoder both for a turbo-decoding and for a Viterbi decoding, at least one first data path for the Viterbi decoding of a convolution code, at least one second data path for the decoding of a turbo code, and a common memory having a multiplicity of individual memory areas. It is possible to allocate at least one memory area both through the first data path in the Viterbi mode and through the second data path in the turbo mode. The invention also includes a trellis processor and a method for operating a decoding apparatus in which at least parts of the first data path and of the second data path can be utilized jointly both for the turbo decoding and for the Viterbi decoding.
摘要:
Depending on the sequence of the decoded payload signal bits (am1, . . . , amA) and redundancy checking bits (pm1, . . . , pmL) which are produced by the Viterbi traceback, either some of these bits are inserted by means of a distribution device (1) from the front into a linear feedback shift register (10), or some of these bits are inserted by means of the distribution device (1) from the rear into a linear feedback shift register (10), or all of them are inserted into a linear feedback shift register (20) from the rear with the allocated coefficients being unchanged, or all of them are inserted into a shift register from the front with the allocated coefficients being inverted. This allows a redundancy checking process to be carried out on a transmitted data block in the shift register (10; 20) without temporary storage of the bits produced by the decoding process.
摘要:
A description is given of an apparatus that includes a division unit configured to receive a data stream and to divide the received data stream into a plurality of data segments. The apparatus further includes a plurality of first CRC check units, wherein each of the first CRC check units is configured to perform a first CRC check of a respective one of the plurality of data segments, the plurality of first CRC checks being performed concurrently, and wherein each of the first CRC check units is configured to perform a second CRC check based on an output of the respective first CRC check unit.
摘要:
A description is given of an apparatus that includes a division unit configured to receive a data stream and to divide the received data stream into a plurality of data segments and a plurality of first CRC check units, wherein each of the first CRC units is configured to perform a CRC check of a respective one of the plurality of segments of data, and wherein the plurality of CRC checks are performed concurrently.
摘要:
In a method of decoding data symbols into codewords, reliability information of the data symbols is provided. A first group of symbols from a first set of groups of symbols is selected, wherein the first set of groups of symbols is defined by at least a first parity-check of a parity-check matrix of a linear block code which has been used to encode the data symbols. The selection is based on the reliability information. A second group of symbols from a second set of groups of symbols is selected, wherein the second set of groups of symbols is defined by at least a second parity-check of the parity-check matrix. The selection is based on the selected first group of symbols and the reliability information. At least a part of the codeword is composed on the basis of the first group of symbols and the second group of symbols.
摘要:
In the method for termination of turbo decoding, a plurality of first LLR values (Lai(k)) of a-priori information and a plurality of second LLR values (Lei(k)) of extrinsic information are called up. A value is determined for a decision variable which is characteristic of the number of mathematical sign discrepancies between the first Lai(k)) and the second Lei(k)) values. The turbo decoding is terminated if the number of mathematical sign discrepancies is less than or at least equal to a first number or if the number is greater than or at least equal to a second number.
摘要翻译:在终止Turbo解码的方法中,先验信息和多个第二LLR值的多个第一LLR值(L SUB)与第二LLR值(k) 调用外在信息的(L)(k))。 确定一个决定变量的值,该决定变量是第一个L< S>(k))和第二个L e(k)之间的数学符号差异的数量的特征 SUP> i SUP>(k))值。 如果数学符号差异的数量小于或至少等于第一数量,或者数量大于或至少等于第二数量,则turbo解码被终止。
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.