摘要:
A wireless communication device is provided to make it possible to detect errors with high accuracy while to suppress reduction in throughput in the case that an LDPC (Low-Density Parity-Check) code is used for an error correcting code. In the wireless communication device, a CRC (Cyclic Redundancy Check) coding unit (101) for carrying out a CRC coding of a part of a transmitting bit sequence in accordance with a row weight of an examination matrix of the LDPC code, an LDPC coding unit (102) for carrying out the LDPC coding and generating LDPC coding data by using the same examination matrix as used for the LDPC coding carried out in the CRC coding unit (101).
摘要:
Provided is a radio communication base station device which can obtain a maximum frequency diversity effect of a downstream line control channel. The device includes: an RB allocation unit (101) which allocates upstream line resource blocks continuous on the frequency axis for respective radio communication mobile stations by the frequency scheduling and generates allocation information indicating which upstream line resource block has been allocated to which radio communication mobile station device; and an arrangement unit (109) which arranges a response signal to the radio communication mobile station device in the downstream line control channels distributed/arranged on the frequency axis while being correlated to the continuous upstream line resource blocks according to the allocation information.
摘要:
Provided is a radio communication base station device which can prevent lowering of use efficiency of a channel communication resource for performing a frequency diversity transmission when simultaneously performing a frequency scheduling transmission and the frequency diversity transmission in a multicarrier communication. In the device, a modulation unit (12) executes a modulation process on Dch data after encoded so as to generate a Dch data symbol. A modulation unit (22) executes a modulation process on the encoded Lch data so as to generate an Lch data symbol. An allocation unit (103) allocates the Dch data symbol and the Lch data symbol to respective subcarriers constituting an OFDM symbol and outputs them to a multiplexing unit (104). Here, when a plurality of Dch are used for a Dch data symbol of one mobile station, the allocation unit (103) uses Dch of continuous channel numbers.
摘要:
Disclosed is a wireless communication base station device which can prevent unnecessary HARQ retransmissions when a terminal is using a plurality of unit bands, even when the unit band through which data is transmitted differs from the unit band through which a PDCCH, to which the resource allocation information of said data is allocated, is transmitted. In this device, a control unit (102) generates, for each of a plurality of downlink unit bands, CFI information, which indicates the number of symbols used in a control channel to which resource allocation information of downlink data to be sent to the terminal has been allocated, with respect to the terminal, which communicates using a plurality of downlink unit bands; a scrambling unit (105) scrambles a control channel in a sequence corresponding to CFI information of downlink bands used in the allocation of downlink data, when, in a plurality of downlink unit bands, the downlink unit band used in the allocation of downlink data and the downlink unit band which transmits control channels to which resource allocation information has been allocated differ from one another.
摘要:
Provided is a radio communication device capable of preventing lowering of the frequency diversity effect when using the CDD (Cyclic Delay Diversity) in combination with the frequency diversity technique in a multi-carrier communication. In the radio communication device (100), a repetition unit (103) repeats each symbol to generate the same symbol, an S/P unit (104) converts a symbol string inputted in series from the repetition unit (103) into a parallel string, and an arrangement unit (105) arranges a plurality of symbols inputted in parallel to any of a plurality of sub-carriers constituting the OFDM symbol. Here, the arrangement unit (105) correlates a plurality of the same symbols generated by repetition to a cyclic delay in the CDD and arranges them to any of the sub-carries constituting each of the OFDM symbols at a sub-carrier interval based on the number of antennas and the delay amount of the CDD transmission.
摘要:
Provided is a radio communication base station device capable of suppressing degradation of a signal error ratio characteristic for a mobile station in the vicinity of the cell center when a plurality of signals whose transmission power is to be controlled are frequency-multiplexed or code-multiplexed. In the device (100), a classification unit (118) classifies a plurality of DPCCH according to the MCS of SCCH into a plurality of groups based on the transmission power intensity. A spread code is allocated for each DPCCH according to the classification result. A spread code for spreading a response signal (ACK signal/NACK signal) is instructed to spread units (103-1 to 103-n). The spread units (103-1 to 103-n) spread the response signal by the spread code instructed from the classification unit (118). According to the classification result in the classification unit (118), a mapping unit (104) maps the response signal after the spread to one of the subcarriers constituting the OFDM symbol.
摘要:
Provided is a radio communication base station device which can obtain a maximum frequency diversity effect of a downstream line control channel. The device includes: an RB allocation unit (101) which allocates upstream line resource blocks continuous on the frequency axis for respective radio communication mobile stations by the frequency scheduling and generates allocation information indicating which upstream line resource block has been allocated to which radio communication mobile station device; and an arrangement unit (109) which arranges a response signal to the radio communication mobile station device in the downstream line control channels distributed/arranged on the frequency axis while being correlated to the continuous upstream line resource blocks according to the allocation information.
摘要:
A wireless communication base station apparatus wherein when a frequency scheduling transmission and a frequency diversity transmission are performed in a multicarrier communication at the same time, the adaptive control of a channel for performing the frequency scheduling transmission can be prevented from being complicated. In this apparatus, a modulating part (12) modulates an encoded Dch data to generate Dch data symbols. A modulating part (22) modulates an encoded Lch data to generate Lch data symbols. An assigning part (103) assigns the Dch and Lch data symbols to subcarriers constituting OFDM symbols and outputs them to a multiplexing part (104). At this moment, the assigning part (103) assigns a set of Dch and Lch data symbols to each subcarrier for a respective subband.
摘要:
An interference power calculation section 208 calculates an interference power value of each symbol according to a calculation expression (interference power=average power of parts unaffected by interference+average power of parts affected by interference) and notifies a turbo decoding section 209 of the calculated interference power value. The turbo decoding section 209 calculates σ2 used to calculate an LLR of turbo decoding according to a calculation expression (σ2=thermal noise+interference power) based on the interference power value notified from the interference power calculation section 208 and thereby changes σ2 based on the interference power value for each symbol notified from the interference power calculation section 208.
摘要:
Provided is a radio communication base station device which can prevent damage of ARQ control in an ARQ in which a response signal (ACK/NACK) channel is shared by a plurality of mobile stations. In the device, a repetition unit (106) repeats a response signal inputted from a modulation unit (105) so as to obtain a plurality of identical response signals and outputs the plurality of response signals to a scrambling unit (107). The scrambling unit (107) scrambles the identical response signals by using a scrambling code corresponding to a mobile station ID number inputted from an allocation information generation unit (101) (that is, a scrambling code unique to each of mobile stations) and outputs the scrambled response signals to an S/P unit (108).