Abstract:
A code generating apparatus, demodulation reference signal generating apparatus, and methods thereof. The demodulation reference signal generator includes generating a non-correlation sequence for RS of a first resource block; spreading spectrums of elements in the non-correlation sequence for RS to be mapped to a first frequency resource of the first resource block, by using a first group of codes; second spreading spectrums of elements in the non-correlation sequence for RS to be mapped to a second frequency resource of the first resource block, by using a second group of Codes; the first and second frequency resources are adjacent frequency resources in frequency resource elements used for RS transmission in the first resource block, and the first and second groups of Codes are mirrors in column to each other; and mapping the spectrum-spread elements to the first and second frequency resources, respectively.
Abstract:
A direct-sequence spread spectrum (DSSS) signal receiving device (10) is described. The device (10) may comprise a receiver unit (22), a chip sequence generating unit (44), a correlation unit (28), and comparison unit (38). The receiver unit (22) may extract, in a detection phase, a chip stream from a radio-frequency signal, said chip stream containing a first chip sequence. The chip sequence generating unit (44) may generate, in said detection phase, a plurality of trial chip sequences on the basis of a first trial chip sequence and on the basis of a plurality of index rotations, each trial chip sequence being index-rotated relative to said first trial chip sequence by one of said index rotations. The correlation unit (28) may determine, in said detection phase, a plurality of correlation values on the basis of said plurality of trial chip sequences and on the basis of said first chip sequence, each of said correlation values indicating a degree of correlation between a respective one of said trial chip sequences and said first chip sequence. The comparison unit (38) may determine, in said detection phase, whether a maximum one of said correlation values exceeds a defined threshold value. A method is also described.
Abstract:
A system comprises a receiver comprising a first pseudorandom binary sequence module, and a transmitter comprising a second pseudorandom binary sequence module. The first pseudorandom binary sequence module is initialized with a first received bit sequence to start bit sequence generation with the aid of the second pseudorandom binary sequence module. Further, received remaining bits are compared to bit sequences generated with the aid of the first pseudorandom binary sequence module to determine whether a bit error rate is below a predefined threshold.
Abstract:
A code generating apparatus, demodulation reference signal generating apparatus, and methods thereof. The demodulation reference signal generator includes generating a non-correlation sequence for RS of a first resource block; spreading spectrums of elements in the non-correlation sequence for RS to be mapped to a first frequency resource of the first resource block, by using a first group of codes; second spreading spectrums of elements in the non-correlation sequence for RS to be mapped to a second frequency resource of the first resource block, by using a second group of Codes; the first and second frequency resources are adjacent frequency resources in frequency resource elements used for RS transmission in the first resource block, and the first and second groups of Codes are mirrors in column to each other; and mapping the spectrum-spread elements to the first and second frequency resources, respectively.
Abstract:
A demodulation reference signal generator includes a non-correlation sequence generator to generate a non-correlation sequence for RS of a first resource block; a first spectrum spreading unit to spread spectrums of elements in the non-correlation sequence for RS to be mapped to a first frequency resource of the first resource block, by using a first group of codes; a second spectrum spreading unit to spread spectrums of elements in the non-correlation sequence for RS to be mapped to a second frequency resource of the first resource block, using a second group of Codes; the first and second frequency resources are adjacent frequency resources used for RS transmission in the first resource block, and the first and second groups of Codes are mirrors in column to each other; and a mapping unit to map the spectrum-spread elements to the first and second frequency resources.
Abstract:
A demodulation reference signal generator includes a non-correlation sequence generator to generate a non-correlation sequence for RS of a first resource block; a first spectrum spreading unit to spread spectrums of elements in the non-correlation sequence for RS to be mapped to a first frequency resource of the first resource block, by using a first group of codes; a second spectrum spreading unit to spread spectrums of elements in the non-correlation sequence for RS to be mapped to a second frequency resource of the first resource block, using a second group of Codes; the first and second frequency resources are adjacent frequency resources used for RS transmission in the first resource block, and the first and second groups of Codes are mirrors in column to each other; and a mapping unit to map the spectrum-spread elements to the first and second frequency resources.
Abstract:
Code generating including generating a non-correlation sequence for RS of a first resource block; spreading spectrums of elements in the non-correlation sequence for RS to be mapped to a first frequency resource of the first resource block, by using a first group of codes; second spreading spectrums of elements in the non-correlation sequence for RS to be mapped to a second frequency resource of the first resource block, by using a second group of Codes; the first and second frequency resources are adjacent frequency resources in frequency resource elements used for RS transmission in the first resource block, and the first and second groups of Codes are mirrors in column to each other; and mapping the spectrum-spread elements to the first and second frequency resources, respectively.
Abstract:
A method of generating a BOC correlation function based on partial correlation functions, an apparatus for tracking a BOC signal, and a spread spectrum signal receiver system using the same are disclosed herein. The apparatus includes a frequency offset compensation unit, a local code generation unit, a mixer, a delay lock loop (DLL), a phase lock loop (PLL), and a data extraction unit. The frequency offset compensation unit outputs a compensated received signal with respect to a received signal. The local code generation unit generates a delay-compensated local code based on a code delay value. The mixer mixes the delay-compensated local code with the frequency offset-compensated received signal. The DLL repeatedly tracks and calculates a code delay value. The PLL repeatedly calculates a carrier frequency compensation value. The data extraction unit extracts spreading data from a mixture of the delay-compensated local code and the compensated received signal.
Abstract:
A code generating apparatus, demodulation reference signal generating apparatus, and methods thereof. The demodulation reference signal generator includes generating a non-correlation sequence for RS of a first resource block; spreading spectrums of elements in the non-correlation sequence for RS to be mapped to a first frequency resource of the first resource block, by using a first group of codes; second spreading spectrums of elements in the non-correlation sequence for RS to be mapped to a second frequency resource of the first resource block, by using a second group of Codes; the first and second frequency resources are adjacent frequency resources in frequency resource elements used for RS transmission in the first resource block, and the first and second groups of Codes are mirrors in column to each other; and mapping the spectrum-spread elements to the first and second frequency resources, respectively.