摘要:
In order to enable to quickly and efficiently execute, by one system, various modulation/demodulation/synchronous processes in a plurality of radio communication methods, a co-processor (22) for complex arithmetic processing, which forms a processor system (100), includes a complex arithmetic circuit (22) that executes for complex data a complex arithmetic operation required for radio communication in accordance with an instruction from a primary processor (10), and a memory controller (20, 21) that operates in parallel with the complex arithmetic circuit and accesses a memory. A trace circuit provided in the complex arithmetic circuit (22) monitors arithmetic result data for first complex data series sequentially read from the memory, and detects a normalization coefficient for normalizing the arithmetic result data.
摘要:
In order to control sub-processors in parallel without losing extensibility, an execution control circuit (30), which forms a multi-processor system (1), issues a process command (CMD) to each of sub-processors (20—1 to 20—3) based on a process sequence (SEQ) designated by a main processor (10), and acquires a process status (STS) which indicates an execution result of processing executed by each of the sub-processors (20—1 to 20—3) in accordance with the process command (CMD). An arbiter circuit (40) arbitrates transfer of the process command (CMD) and the process status (STS) between the execution control circuit (30) and each of the sub-processors (20—1 to 20—3).
摘要:
It is possible to improve a radio communication digital baseband processing device including data encryption/decryption so as to prevent processing failure caused by a data rate increase in recent years by increasing the MAC processing speed of data encryption/decryption and realizing the load distribution in a processing device. A data processing device which performs a communication process including data encryption/decryption includes: a control processor which performs calculation of the MAC processing parameter; and MAC processing means which performs MAC data processing including data encryption/decryption. The control processor controls the MAC processing means by a command script continuously describing a combination of a command and parameter accompanying it.
摘要:
In an FFT computing apparatus, a computation-unit switching detection unit detects timing at which a complex multiplication is not being carried out in said butterfly computation of FFT computation, and a complex-multiplication power-computation unit switches computation between complex multiplication and power computation, based on a detection result by said computation-unit switching detection unit. The complex-multiplication power-computation unit performs power computation at timing at which complex multiplication is not carried out in said butterfly computation of FFT computation.
摘要:
In order to control sub-processors in parallel without losing extensibility, an execution control circuit (30), which forms a multi-processor system (1), issues a process command (CMD) to each of sub-processors (20—1 to 20—3) based on a process sequence (SEQ) designated by a main processor (10), and acquires a process status (STS) which indicates an execution result of processing executed by each of the sub-processors (20—1 to 20—3) in accordance with the process command (CMD). An arbiter circuit (40) arbitrates transfer of the process command (CMD) and the process status (STS) between the execution control circuit (30) and each of the sub-processors (20—1 to 20—3).
摘要:
An interleaving method includes: generating multiple read-addresses for respective bits of multiple write-words; queuing the read-addresses in parallel in multiple address queues; selecting an address queue among the address queues that is not empty based on status of each address queue; decoding the address from the selected address queue to a read-address and a bit-address; extracting a read-word from data to be interleaved based on the read-address; selecting a write-bit from the read-word based on the bit-address; arbitrating an individual write-bit to one of the write-words based on an address queue ID of the selected address queue; and generating write-addresses for respective write-words.
摘要:
An encoding/decoding processor includes a coprocessor that is dedicated to encoding and decoding processes, where the coprocessor comprises: a parameter register that stores externally given operation modes and the settings of generation polynomials; and a calculation circuit that operates on the basis of the operation modes and the generation polynomials and that performs calculations, which are required for the encoding and decoding processes, by a plurality of bits per cycle in a parallel manner, and the coprocessor further comprises memory controllers, which include: address generator circuits for outputting the addresses of the storage devices; FIFO circuits for temporarily storing data; and data packing circuits for making up predetermined numbers of bits of data for output.
摘要:
It is possible to improve a radio communication digital baseband processing device including data encryption/decryption so as to prevent processing failure caused by a data rate increase in recent years by increasing the MAC processing speed of data encryption/decryption and realizing the load distribution in a processing device. A data processing device which performs a communication process including data encryption/decryption includes: a control processor which performs calculation of the MAC processing parameter; and MAC processing means which performs MAC data processing including data encryption/decryption. The control processor controls the MAC processing means by a command script continuously describing a combination of a command and parameter accompanying it.
摘要:
In response to the inputting of an asynchronous signal (DATA) which is not synchronized with a clock signal, the inputting of the clock signal to the inside of the device is controlled to an on-state. Further, in response to the termination of the operation of the device, the inputting of the clock signal to the inside of the device is controlled to an off-state. In this case, the level change of the asynchronous signal is detected by a comparator, and based on the detection result, the inputting of the clock signal is controlled to either the on-state or the off-state by a clock control circuit. By stopping the inputting of the clock signal, the power consumption of the device can be reduced.
摘要:
A processor core interrupt control circuit issues a request signal for requesting cancellation of a coprocessor instruction being executed at a coprocessor. A program control circuit issues interrupt processing after issuance of the cancellation request. A coprocessor computation control circuit retains the execution state of the coprocessor instruction. Upon receiving the processing cancellation request signal, a coprocessor interrupt control circuit performs cancellation or holding of the coprocessor instruction on the basis of execution state information retained by the coprocessor computation control circuit. The coprocessor interrupt control circuit evicts the execution state of the coprocessor instruction in the case of holding, and restores the execution state of the coprocessor instruction that had been evicted after completion of the interrupt processing.