摘要:
A programmable synchronizing unit for a signal receiver has a received data memory for buffering received data, a correlation value data memory for storing correlation values, a data path for correlating the received data with the correlation values, a result data memory for buffering the received data correlated with the correlation values by means of the data path, and a control unit for addressing the received data memory, the result data memory and the correlation value data memory (26) and for controlling the data path as a function of a synchronization program which is stored in a program memory.
摘要:
A code word generator for OVSF codes, comprising an intermediate memory device (16) which is used to input a calculation index as a binary calculation index data word, a calculation device (17) which permutes the significant data bits of the calculation index data word bit-by-bit so that a calculation basis (B) can be generated, a counter (21) for producing a counting variable (Z) and provided with a logic circuit comprising several AND gates for bit-by-bit linkage of the counting variables (Z) generated with the calculation basis (B) in order to form a linking data word and several XOR gates for logical reduction of the linking data word to form code word data bits of the OVSF code word.
摘要:
A turbo-code decoder with iterative channel parameter estimation for decoding turbo-coded received data that includes systematic information data and redundant data. The turbo-code decoder includes a weighting circuit for weighting the turbo-coded received data with at least one estimated channel parameter. Estimated value data is generated. A turbo-code coding circuit turbo-codes the generated estimated value data. A comparison circuit compares the turbo-coded estimated value data with the turbo-coded received data, and depending on the result of the comparison, iteratively sets the estimated channel parameter(s) in order to weight the turbo-coded received data.
摘要:
CDMA Receiver. According to one embodiment, a CDMA receiver is provided for receiving a CDMA signal in a multi-subscriber environment. The multi-subscriber environment can include a receiving device for receiving the CDMA signal. Further, the environment can include a Rake receiving circuit for detection of signal components of the CDMA signal which are transmitted via the various signal paths. The environment can also include a channel estimation circuit for estimating channel coefficients of a transmission channel coefficient h of a transmission channel H by means of a predetermined reference data sequence contained in the received CDMA signal. A weighting coefficient calculation device can calculate weighting coefficients for the various signal components of the CDMA signal. Further, the environment can include a weighting circuit for weighting the signal components with the calculaed weighting coefficients. A combiner can combine the weighted signal components to form an estimated received data signal.
摘要:
A device for placing power control data in a transmission signal has: a generating device for generating power control data as a function of a received signal, a buffer for buffering a formatted transmission data word that contains a power control data field for recording power control data, an inserting device for inserting the generated power control data into the power control data field of the buffered transmission data word, and a modulation device for modulating the transmission data word to form a transmission signal with a transmission power corresponding to the power control data.
摘要:
A turbo decoder for decoding a data signal transmitted via a disturbed channel has a symbol estimator and a digital signal processor. The symbol estimator performs two symbol estimations, and the DSP performs an interleaving and deinterleaving procedure, within a computing loop of the iterative turbo decoding. A bidirectional interface is provided for transferring data between the symbol estimator and the DSP.
摘要:
A device for placing power control data in a transmission signal has: a generating device for generating power control data as a function of a received signal, a buffer for buffering a formatted transmission data word that contains a power control data field for recording power control data, an inserting device for inserting the generated power control data into the power control data field of the buffered transmission data word, and a modulation device for modulating the transmission data word to form a transmission signal with a transmission power corresponding to the power control data.
摘要:
A turbo decoder for decoding a data signal transmitted via a disturbed channel has a symbol estimator. The symbol estimator contains a computing device, which, with knowledge of the error protection code used at the transmitter end, calculates transition metric values, forward and reverse recursion metric values and the output values (LLR). The computing device includes at least one hardware computing chip constructed of combinatorial logic for generating at least one type of the values.
摘要:
A device for placing power control data in a transmission signal has: a generating device for generating power control data as a function of a received signal, a buffer for buffering a formatted transmission data word that contains a power control data field for recording power control data, an inserting device for inserting the generated power control data into the power control data field of the buffered transmission data word, and a modulation device for modulating the transmission data word to form a transmission signal with a transmission power corresponding to the power control data.
摘要:
A device for carrying out search procedures includes a memory for storing a digital received data sequence, and a memory storing a predetermined correlation data sequence. A correlation device has a first section, in which sequence elements of the received data sequence are correlated with sequence elements of the correlation data sequence. A variable number K of sequence element correlation results are summed in the second section, in order to form an accumulated correlation result.