摘要:
A wireless system has an uplink chip rate processing architecture in which at least two groups of registers are provided, each group of register storing a set of time slot configuration parameters. A storage stores a sequence of time slot configuration set identifiers each identifying one of the groups of registers, each identifier corresponding to a time slot. A chip rate processing unit processes a stream of data over a plurality of time slots in which at each of the time slots, and the chip rate processing unit is configured according to the set oftime slot configuration parameters stored in the group of register associated with the time slot configuration set identifier corresponding to the time slot.
摘要:
A joint detection system is configured to perform joint detection of received signals and includes a joint detection accelerator and a host processor. The joint detection accelerator may include a memory unit to store input data values, intermediate results and output data values; one or more computation units to process the input data values and the intermediate results, and to provide output data values to the memory unit; a controller to control the memory and the one or more computation units to perform joint detection processing; and an external interface to receive the input data values from the host processor and to provide output data values to the host processor. The computation units may include a complex multiply accumulate unit, a simplified complex multiply accumulate unit and a normalized floating point divider. The memory unit may include an input memory, a matrix memory, a main memory and an output memory.
摘要:
A method for reducing current drain in a communication device includes a first step of detecting interference including intermodulation and crossmodulation products. A next step includes determining a frequency offset of the interference with reference to the operating receiver band. A next step includes measuring a power level of the interference. A next step includes calculating a receiver linearity required to achieve a desired signal-to-interference ratio. A next step includes adjusting the receiver linearity in order to achieve the desired signal-to-interference ratio. Optionally, the receiver dynamic range can be adjusted to suit the reduced signal swing due to the reduced linearity.
摘要:
Apparatus and method for correlating a received communication of a known sequence over a wireless channel. Processing at the required higher sampling rate is achieved through the use of a finite impulse response (FIR) filter (24) having a small number of taps for interpolating samples. This reduces hardware requirement by as much as one-half that of conventional techniques based on over-sampling the received signal, while obtaining amplitude degradation which is no worse than experienced when employing conventional techniques.
摘要:
A proposed data processing device includes at least two processor units, which each is adapted to process digitized precorrelation navigation satellite signal data as well as to process alternative data and/or signals relating to at least one function being uncorrelated with the satellite signal data. The device includes at least one data buffer adapted to store data sets, where each set includes a number of instances of the satellite signal data. A control module in the device controls execution of a processing job with respect to a stored data set by allocating individual processing tasks to at least one of the at least two processor units based on a current processing load on each processor unit.
摘要:
A method and apparatus for performing a power efficient cell search in a multi-cell wireless communication system are disclosed. A wireless transmit/receive unit (WTRU) having a memory that stores a cell identification list of prioritized previously top-ranked cell identities (IDs) is used to perform the cell search. A primary synchronization code (PSC) correlation peak location on a received signal is selected. A common pilot channel (CPICH) correlation value is determined by non-coherent integration of a local signal created based on a first cell ID on the cell identification list to the received signal. If the CPICH correlation value is greater than a noise threshold, thus indicating that the first cell ID is a newly found cell ID, or if a last cell ID in the cell identification list is reached, an additional determination is made as to whether there is more than one cell ID on the list having the same timing.
摘要:
This device (10) is suitable for receiving a baseband spread spectrum analogue signal (r(t)) emanating from a multipath propagation channel, this analogue signal conveying symbols. It comprises a structure with at least two stages (130, 140, 150), each stage comprising a block for estimating said symbols, and, with the exception of the last stage (150), a block for regenerating interference using the symbols estimated by the symbol estimating block of the said stage. The signals are transmitted at the chip rate from one stage to the other and each of the interference regenerating blocks uses a complete Nyquist formatting.
摘要:
A method to recover spread spectrum radio signals is disclosed (fig. 4). The method includes recovering clock information from a plurality of signals from at least one basestation (200). Aligning the plurality of signals using the recovered clock signals (202). Combining at least two of the aligned signals (206). Recovering information from the combined signals (208).
摘要:
A CDMA radio communication system using a long code specific to a cell, the CDMA radio communication system comprising: a transmission apparatus that transmits a frame comprising a plurality of slots; and a reception apparatus that receives the frame, the each slot comprises a first short code and a second short code, the first short code is common in all cells, and the second short code comprises information about the long code and a timing of the frame, and a transmission apparatus in this system.