摘要:
A data communication apparatus according to the present invention includes a channel determination unit for determining frequency channels to be monitored on the basis of a current location of the ship station, a performance measurement unit for measuring channel performance for each of the determined frequency channels, a channel selection unit for selecting one frequency channel from among the determined frequency channels on the basis of the measured channel performance, and a data communication unit for performing data communication with the coast station using the selected frequency channel.
摘要:
Disclosed are an apparatus for transmitting multi-carrier signals, including: a signal spreading unit configured to generate band-spread signals through band spreading of a plurality of symbol-mapped signals; and a modulation unit configured to generate a modulation signal by mixing the band-spread signals with a plurality of sub-carriers and adding up the mixed band-spread signals, and a method for transmitting multi-carrier signals.
摘要:
Disclosed are a data rate matching method and apparatus for use in mobile communication systems that can perform parallel interleaving at a high speed without a collision between encoded data input in parallel. A set of first parameters (f1) is calculated on the basis of a length (D) of encoded input data and a set of second parameters (f2) is calculated on the basis of a set of prime numbers constituting a value of the length (D) of the input data. Interleaving is performed on the basis of the set of first parameters (f1), the set of second parameters (f2), and the length (D) of the input data.
摘要:
Provided are a method and apparatus for allocating DeModulation Reference Signals (DMRSs). The method includes generating DMRSs, and allocating the DMRSs at consecutive subcarrier positions with respect to all the transmit (TX) antennas of each User Equipment (UE) and allocating the DMRSs at different subcarrier positions with respect to each TX antenna of the UE.
摘要:
A data derate matcher for supporting hybrid automatic repeat request (HARQ), includes a control parameter generation unit for generating control parameters to separate bits of an input bit stream ek; and a bit separation unit for separating the bits of the input bit stream ek into three types of bits streams v(0)k, v(1)k, and v(2)k by modulus operation of each of the bits of the input bit stream and the control parameters. Further, the data derate matcher for supporting the HARQ includes address generators for generating addresses (j) of valid data to be used in deinterleavers with respect to data of each of the bit streams output from the bit separation unit; and subblock deinterleavers for sequentially inputting data corresponding to the addresses generated by the address generators to output decoded data.
摘要:
Provided is a data transmission device and a symbol generation method of the same. A data processing unit of a data transmission device according to an embodiment of the present invention accesses a memory device for reading another data block while symbols for one data block are generated.