Abstract: A receiving device including: a demodulation circuit configured to generate first likelihood data of reception symbols based on a transmission format of the reception symbols, the transmission format being selected from transmission formats and including a modulation scheme applied to the reception symbols, the modulation scheme being one of amplitude modulation schemes, a processor configured to estimate a scale ratio of an implementation scale to a theoretical scale, the implementation scale being a scale of the first likelihood data, the theoretical scale being a scale of second likelihood data of the reception symbols, the second likelihood data being defined by a theory and not depending on an implementation of the receiving device, and to generate the second likelihood data based on the first likelihood data and the scale ratio, and a decoding circuit configured to decode the second likelihood data based on the transmission format.

Abstract: In this invention a wireless apparatus for conducting receiving process of data using a control signal which is started in transmission prior to transmission of such data is characterized in comprising a detecting unit for detecting that the undefined data is included in a first part transmitted prior to a second part as a part of the control signal is used for solving problem.

Abstract: An mobile station implements data transport which allows for handover. The mobile station transmits a second datum in response to a first datum received from a wireless base station, the mobile station being characterized in that it comprises: a detection unit which detects that handover is to be performed; and a control unit which provides control such that, in cases where the detection has been made, the changeover timing of the transmission destination for the second datum is made later than the changeover timing of the reception channel for the first datum.

Abstract: A radio communication device including: a processor configured to store each of quantization values of codeword to a memory in accordance with a transmission format, so as to fit each of the quantization values within a specified number of areas which are allocated in the memory, each of the areas having a specified size, and so as to satisfy at least one of a first condition and a second condition, the first condition indicating that the specified number is fewer than the maximum first bit number corresponding to a first transmission format with which a first bit number of the codeword is maximum among the predetermined transmission formats, and the second condition indicating that the specified size is fewer than the maximum second bit number corresponding to a second transmission format with which a second bit number of each of the quantization values is maximum among the predetermined transmission formats.

Abstract: An error correcting code decoding device includes a first decoding circuit, a word-length reduction circuit configured to reduce bit lengths of a first external values corresponding to a plurality of bits obtained after decoding process performed by the first decoding circuit a first predetermined number of times and to reduce bit lengths of words included in word string, and a second decoding circuit configured to decode the bit string by executing a decoding process a second predetermined number of times for calculating second external values and posterior values of the bits included in the bit string in accordance with the word string including the words having the reduced bit lengths using the first external values having the reduced bit lengths as second prior probabilities that corresponding bits among the plurality of bits are the predetermined value.

Abstract: A iterative decoding method for iteratively carrying out a decoding process for an encoded segmented and signal transmitted in a plurality of (Ncb) sub blocks for each predetermined block unit includes storing a number of (ncb) sub blocks smaller than the number (Ncb) of the sub blocks; and successively and iteratively carrying out a decoding process for each of the stored (ncb) sub blocks within a specified time period determined based on the number (ncb).

Abstract: A receiver including: a memory, and a processor configured to calculate a plurality of soft decision values based on a received symbol to which a plurality of bits are mapped, to select at least one first soft decision value of the plurality of soft decision values, to calculate at least one relative value of at least one second soft decision value of the plurality of soft decision values other than the at least one first soft decision value, based on the at least one first soft decision value, to store the at least one first soft decision value and the at least one relative value, in the memory, and to estimate the plurality of bits based on the at least one first soft decision value and the at least one relative value which are stored in the memory.

Abstract: A wireless communications system including a mobile station MS and base stations BS1 and BS2, wherein one or both of the mobile station MS and the base stations BS1 and BS2 is provided with a unit for notifying information of a frame position with the possibility of transmission of packets based on detection of deterioration of a reception quality and wherein the mobile station MS is provided with a unit for determining a frame position without the possibility of transmission of packets and shifting to a peripheral cell detection mode at this frame position based on information of a frame position with the possibility of transmission of packets, whereby it is possible to shift to a peripheral cell detection mode without lowering the transmission efficiency and without complicating the processing.

Abstract: A wireless communications system including a mobile station MS and base stations BS1 and BS2, wherein one or both of the mobile station MS and the base stations BS1 and BS2 is provided with a unit for notifying information of a frame position with the possibility of transmission of packets based on detection of deterioration of a reception quality and wherein the mobile station MS is provided with a unit for determining a frame position without the possibility of transmission of packets and shifting to a peripheral cell detection mode at this frame position based on information of a frame position with the possibility of transmission of packets, whereby it is possible to shift to a peripheral cell detection mode without lowering the transmission efficiency and without complicating the processing.

Abstract: A reception apparatus including: a receiver configured to receive a symbol including a plurality of bits and to calculate each of likelihoods for each of the plurality of bits, and a processor configured to quantize each of the likelihoods based on each of numbers of quantization bits for each of the plurality of bits, wherein all of the numbers of quantization bits are not same.

Abstract: A receiving device in a communication system that separates one frame of information bits into plural blocks, performs turbo encoding of the information bits of each block and transmits the result, and decodes the encoded information bits, where the receiving device includes plural decoders number of which is less than the number of blocks per frame. Each decoder performs a decoding process on encoded information bits of each block that have been expressed by likelihood, when a condition for stopping decoding is met, executes the decoding process of encoded information bits of another block for which decoding has not yet been performed. When the condition for stopping decoding has been met for all blocks before the number of times decoding has been performed for each decoder reaches a preset maximum number of repetitions, the decoding results of all the blocks are serially combined, an error detection process is executed.

Abstract: A method in a communication system, where a systematic code obtained by systematic encoding of information bits having dummy bits inserted and by deletion of the dummy bits from results of the systematic encoding is transmitted. On a receiving side, the deleted dummy bits are inserted into the received systematic code and then decoded. The method includes: deciding a size of dummy bits for insertion into information bits; segmenting the information bits into a number of code blocks when a bit size of the information bits is greater than a stipulated size; inserting dummy bits into each block of the segmented information bits in conformity with a dummy bit insertion pattern; performing systematic encoding of each block of the information bits into which the dummy bits are inserted, and deleting the dummy bits from the results of the systematic encoding to generate a systematic code.

Abstract: A turbo decoding device includes a memory unit that stores data in an interleaving process performed in a process of decoding a coded signal encoded with a turbo code and an access unit that accesses the memory unit to read and write the data. The memory unit includes memory circuits and is formed as one memory space by coupling the memory circuits. Furthermore, the memory circuit functions as a first bank configuration by which a first capacity is assigned to each bank or a second bank configuration by which a second capacity is assigned to each bank in accordance with a combination of the memory circuits. Moreover, the access unit selects by which of the first bank configuration and the second bank configuration the memory unit functions in accordance with a communication method of a coded signal and accesses the memory unit in accordance with the selected bank configuration.

Abstract: A iterative decoding method for iteratively carrying out a decoding process for an encoded segmented and signal transmitted in a plurality of (Ncb) sub blocks for each predetermined block unit includes storing a number of (ncb) sub blocks smaller than the number (Ncb) of the sub blocks; and successively and iteratively carrying out a decoding process for each of the stored (ncb) sub blocks within a specified time period determined based on the number (ncb).

Abstract: A method for using a mobile user terminal includes a receiving a signal and a measuring downlink channel quality based on the signal; wherein downlink channel quality information and an uplink pilot signal simultaneously is not transmitted at a period which the mobile user terminal is a state of transmission off in an intermittent fashion.

Abstract: A method for using a mobile user terminal includes a receiving a signal and a measuring downlink channel quality based on the signal; wherein downlink channel quality information and an uplink pilot signal simultaneously is not transmitted at a period which the mobile user terminal is a state of transmission off in an intermittent fashion.

Abstract: An error correcting code decoding device includes a first decoding circuit, a word-length reduction circuit configured to reduce bit lengths of a first external values corresponding to a plurality of bits obtained after decoding process performed by the first decoding circuit a first predetermined number of times and to reduce bit lengths of words included in word string, and a second decoding circuit configured to decode the bit string by executing a decoding process a second predetermined number of times for calculating second external values and posterior values of the bits included in the bit string in accordance with the word string including the words having the reduced bit lengths using the first external values having the reduced bit lengths as second prior probabilities that corresponding bits among the plurality of bits are the predetermined value.

Abstract: A mobile user terminal includes a receiver which receives a signal, and a processor which measures downlink channel quality based on the signal and does not transmit downlink channel quality information and an uplink pilot signal simultaneously at a period which the mobile user terminal is a state of transmission off in an intermittent fashion.

Abstract: A mobile user terminal includes a receiver which receives a signal, and a processor which measures downlink channel quality based on the signal and does not transmit downlink channel quality information and an uplink pilot signal simultaneously at a period which the mobile user terminal is a state of transmission off in an intermittent fashion.

Abstract: A method for using a mobile user terminal includes a receiving a signal and a measuring downlink channel quality based on the signal; wherein downlink channel quality information and an uplink pilot signal simultaneously is not transmitted at a period which the mobile user terminal is a state of transmission off in an intermittent fashion.