摘要:
Provided is a cell search method in a wireless communication system. According to the cell search method, when detecting SSS in order to search a cell group ID in 3GPP LTE communication, it is possible to reduce the computational complexity for SSS detection by selecting the sequence group of which cross-correlation between initially grouped SSS sequences is a predetermined value or more, computing cross-correlation with the sequences in the selected sequence group, and extracting a cell group ID through detection of the SSS sequence having the highest cross-correlation.
摘要:
Provided are a method and apparatus for efficiently transferring a massive amount of multimedia data between two processors. The apparatus includes a first local switch, which connects a virtual page of a first processor element to a shared memory page, a second local switch, which connects a virtual page of a second processor element to the shared memory page, a shared page switch, which connects a predetermined shared memory page of a shared physical memory to the first or second local switch, and a switch manager, which remaps a certain shared memory page of the shared physical memory that stores data of a task performed by the first processor element to the virtual page of the second processor element. Accordingly, since memory remapping is used, the massive amount of multimedia data can be transmitted by changing a method of mapping a memory, unlike a case when multimedia data is transmitted by using a memory bus.
摘要:
A fast Fourier transformer (FFT) includes a radix-2 butterfly unit configured to perform a butterfly operation on input data; a buffer unit configured to buffer data outputted from the radix-2 butterfly unit and output the buffered data to the radix-2 butterfly unit; a multiplexing unit configured to selectively output a twiddle factor; and a constant multiplier configured to multiply the data outputted from the radix-2 butterfly unit by the twiddle factor outputted from the multiplexing unit.
摘要:
Provided are an embedded system and a method for relocating memory pages therefor. The embedded system includes a processor, a data relocating circuit for receiving a logical address from the processor, mapping the received logical address to a physical address to locate a valid page in a predetermined bank, and generating a bank power control signal according to whether or not a corresponding memory bank includes valid pages, and a memory including a plurality of memory banks addressed by a physical address outputted from the data relocating circuit and a plurality of switching means for selectively supplying a power voltage to each of memory banks in response to the bank power control signal.
摘要:
Disclosed is a radar apparatus supporting short range and long range radar operations, wherein a plurality of short range transmitting chirp signals and a plurality of long range transmitting chirp signals are generated by a predetermined modulation scheme and is transmitted to an object through at least one transmitting array antenna and signals reflected from the object is received through at least one receiving array antenna, and the plurality of long range transmitting chirp signals have transmission power larger than that for the plurality of short range transmitting chirp signals.
摘要:
A packet combining device for a communication system using hybrid automatic repeat request (HARQ) includes: a HARQ buffer; a combiner configured to combine data which is previously received and stored in the HARQ buffer with newly-received data; and a channel decoder configured to attempt channel decoding by using the combined received data provided from the combiner and provide one or more of log likelihood ratios (LLRs) computed for a systematic bit and a parity bit of the combined received data to the combiner such that the one or more LLRs are combined with the data used for channel decoding.
摘要:
Disclosed is a method for detecting S-SCH in cell searching including: detecting an m0 value corresponding to an even index in a secondary synchronization channel (S-SCH) signal having an even index; determining an m1 group defined by the m0 value; detecting an m1 value using correlation detection relation within the m1 group; and detecting a group ID using the m0 value and the m1 value.
摘要:
Disclosed is a radar apparatus supporting short range and long range radar operations, wherein a plurality of short range transmitting chirp signals and a plurality of long range transmitting chirp signals are generated by a predetermined modulation scheme and is transmitted to an object through at least one transmitting array antenna and signals reflected from the object is received through at least one receiving array antenna, and the plurality of long range transmitting chirp signals have transmission power larger than that for the plurality of short range transmitting chirp signals.
摘要:
A apparatus for allocating physical resources at high speed includes: a storage unit storing correspondence relationships between virtual resource blocks and physical resource blocks according to external variables and internal variables; an internal variable calculation unit receiving the external variables for allocating physical resource blocks and calculating internal variables determined by the received external variables; and a searching unit referring to the storage unit by using the received external variables and allocating physical resources corresponding to the virtual resource blocks.
摘要:
Provided are an apparatus, a method, and a data processing element (DPE) for efficient parallel processing of multimedia data. The DPE includes: a memory routing unit (MRU) comprising a shared memory page shared by the DPE and DPEs that are adjacent to the DPE, and a shared page switch selectively connecting the shared memory page to the DPE and the adjacent DPEs; and a data processing unit (DPU) comprising a virtual page for connecting the DPU to the shared memory page, and a dynamic remapper assigning the shared memory page to a DPE according to conditions that a series of tasks for processing multimedia data are performed in the DPE and the adjacent DPEs, and controlling the shared page switch according to the assigning. Accordingly, multimedia data can be efficiently processed in parallel by mapping a temporal and directional shared memory between DPEs.