摘要:
A symbol mapping method for repetition coding is disclosed. The symbol mapping method comprises performing repetition coding on codeword to output repeated codeword symbols, and mapping the repeated codeword symbols with subcarriers located in different localized resource blocks. According to the embodiments of the present invention, it is possible to obtain maximum reliability in a receiving side by mapping codeword bits with subcarriers to reduce the number of bits having low reliability when a transmitting side uses repetition coding. Also, it is possible to improve decoding throughput and obtain channel diversity.
摘要:
A method for transmitting and receiving signals using multi-band Radio Frequencies (RFs) is provided. The method includes transmitting/receiving control information identifying a subsidiary carrier frequency band for a user equipment via a primary carrier frequency band of the user equipment, wherein the control information includes information of a second ID assigned to a first ID of the subsidiary carrier frequency band among a plurality of first IDs, the first ID identifying the subsidiary carrier frequency band in the physical layer and the second ID identifying the subsidiary carrier frequency band in the specific layer.
摘要:
A method for transmitting information using a sequence is disclosed. According to an embodiment, the method includes the steps of generating a sequence for transmitting data or control signals, performing phase modulation for indicating additional information on partial elements among a plurality of elements configuring the sequence, and transmitting the phase modulated sequence.
摘要:
A signal mapping method and a signal transmission method applying a subcarrier shift method are described. A signal mapping method using shifted subcarriers includes shifting positions of data subcarriers by as much as a frequency band corresponding to half of spacing between data subcarriers on a frequency axis, and shifting positions of random access preamble subcarriers by as much as a frequency band corresponding to half of spacing between the data subcarriers and to a specific ratio of spacing between the random access preamble subcarriers, and mapping data and a random access preamble to the data subcarriers and the random access preamble subcarrier, respectively. Even when the spacing between the data subcarriers is a multiple of the spacing between the random access preamble subcarriers, DC distortion can be minimized.
摘要:
A method for a user equipment to transmit a random access preamble sequence to a base station includes transmitting the random access preamble sequence generated from a Constant Amplitude Zero Auto Correlation (CAZAC) sequence to the base station, wherein the CAZAC sequence is cyclic shifted according to one of applicable cyclic shift values defined considering a value (M) representing a Doppler shift of one subcarrier spacing and a cyclic shift unit length (T), and wherein when the value (M) meets a condition of ‘P*T≦M
摘要:
A device and method for communicating by a mobile communication terminal in communication with a base station. The method according to an embodiment includes exchanging a frame of data with the base station. The frame of data includes a) a plurality of first subframes each having a first number of orthogonal frequency division multiple access (OFDMA) symbols, and b) a plurality of second subframes each having a second number of orthogonal frequency division multiple access (OFDMA) symbols different from the first number. One of the second subframes includes an idle symbol.
摘要:
Method for generating reference signal sequence using grouping is explained. In this method, base sequences are grouped such that each group contains at least one base sequence of each length, so UE(s) can use various length sequences as a reference signal. And in this method, inter cell interference caused by using various length sequence as a reference signal sequence can be minimized by grouping sequences having the high cross correlation relation.
摘要:
A device and method for communicating by a mobile communication terminal in communication with a base station. The method according to an embodiment includes exchanging a frame of data with the base station. The frame of data includes a) a plurality of first subframes each having a first number of orthogonal frequency division multiple access (OFDMA) symbols, and b) a plurality of second subframes each having a second number of orthogonal frequency division multiple access (OFDMA) symbols different from the first number. A first and a last subframe each includes one of the plurality of first subframes.
摘要:
A method of performing cell search includes receiving a primary synchronization signal (PSS) comprising a primary synchronization code (PSC), and receiving a secondary synchronization signal (SSS) comprising a first secondary synchronization code (SSC) and a second SSC. The first SSC and the second SSC are respectively scrambled by using a first scrambling code and a second scrambling code, and the first scrambling code and the second scrambling code are associated with the PSC. Detection performance on synchronization signals can be improved, and cell search can be performed more reliably.
摘要:
A device and method for communicating by a mobile communication terminal in communication with a base station. The method according to an embodiment includes exchanging a frame of data with the base station. The frame of data includes a) a plurality of first subframes each having a first number of orthogonal frequency division multiple access (OFDMA) symbols, and b) a plurality of second subframes each having a second number of orthogonal frequency division multiple access (OFDMA) symbols different from the first number. A first and a last subframe each includes one of the plurality of first subframes.