Abstract: Provided is a base station apparatus that employs a dynamic scheduler mode which performs wireless resource allocation for each subframe and applies a result of the allocation to the corresponding subframe, or a continuous transmission scheduler mode which performs wireless resource allocation for each subframe appearing periodically based on a period P and applies a result of the allocation for the relevant subframe to P continuous subframes from a subframe n to a subframe n+P?1. The base station apparatus includes a terminal communication device that communicates continuous transmission application ON/OFF information, which indicates whether or not the continuous transmission scheduler mode is employed, and continuous transmission period information, which indicates a period of continuous transmission scheduling according to the continuous transmission scheduler mode, to a terminal.

Abstract: In a digital signal transmission method according to the present invention, when N1 is the number of code multiplexes of a first transmit block including an information bit and part of a parity bit, and N2 is the number of code multiplexes of a subsequent transmit block including the remaining parity bit, a spread multiplexer 104 performs spread multiplexing of each block in a relationship of N1>N2.

Abstract: Provided is a base station apparatus that employs a dynamic scheduler mode which performs wireless resource allocation for each subframe and applies a result of the allocation to the corresponding subframe, or a continuous transmission scheduler mode which performs wireless resource allocation for each subframe appearing periodically based on a period P and applies a result of the allocation for the relevant subframe to P continuous subframes from a subframe n to a subframe n+P?1. The base station apparatus includes a terminal communication device that communicates continuous transmission application ON/OFF information, which indicates whether or not the continuous transmission scheduler mode is employed, and continuous transmission period information, which indicates a period of continuous transmission scheduling according to the continuous transmission scheduler mode, to a terminal.

Abstract: The present invention maps coded bits that have been output from a low density parity check coder 11 onto specific bit positions on a 16 QAM constellation diagram in accordance with a column weighting of the coded bits.

Abstract: A wireless communication system includes a macro-base station device and a CGS base station device normally connected to a CSG terminal device. When a non-CGS terminal device approaches the CGS base station device, the CGS base station device reduces a frequency band for transmitting packets to the CGS terminal device so as to reduce interference with the non-CGS terminal device while increasing transmission power to the CGS terminal device so as to compensate for degradation of radio quality due to a reduction of the frequency band. Based on existence or nonexistence of a non-CSG terminal device in the coverage area, the CSG base station device selects an appropriate antenna transmission mode and an appropriate scheduler mode while setting the number of OFDM symbols utilized by a physical control channel in notifying radio resource allocation information.

Abstract: The multi-carrier code dividing multiplex transfer system of the present invention includes a direct demodulator that discriminates transmitted signals according to a receiving signal point composed of a combination of receiving values in a spread state of sub-carriers in a range where one modulated symbol is spread, and according to reference signal composing values that can be taken by the combination of the receiving values in the spread state of the sub-carriers. As a result, it is possible to prevent from affects of inter-code interference, and improve receiving characteristics as well.

Abstract: The multi-carrier code dividing multiplex transfer system of the present invention includes a direct demodulator that discriminates transmitted signals according to a receiving signal point composed of a combination of receiving values in a spread state of sub-carriers in a range where one modulated symbol is spread, and according to reference signal composing values that can be taken by the combination of the receiving values in the spread state of the sub-carriers. As a result, it is possible to prevent from affects of inter-code interference, and improve receiving characteristics as well.

Abstract: An adaptive rotation angle control apparatus of this invention includes a communication quality approximating equation storage portion which stores a communication quality approximating equation including as variables reception quality information, amplitude fluctuation information, and a rotation angle; a computation portion which substitutes into the communication quality approximating equation the reception quality information and amplitude fluctuation information of the input information, and a rotation angle, and calculates the value of the communication quality approximating equation; and an adaptive control portion which provides a rotation angle to the computation portion, receives from the computation portion communication quality information, which is the value of the communication quality approximating equation calculated using the rotation angle provided, and determines the optimum rotation angle based on the received communication quality information.

Abstract: A 4ASK demodulator (23) determines a received signal, based on both a received signal point at the time when a signal, which has been modulated by the 4ASK system, is received and a probability of occurrence of a modulated symbol of the 4ASK system.

Abstract: The present invention maps coded bits that have been output from a low density parity check coder 11 onto specific bit positions on a 16 QAM constellation diagram in accordance with a column weighting of the coded bits.

Abstract: In a digital signal transmission method according to the present invention, when N1 is the number of code multiplexes of a first transmit block including an information bit and part of a parity bit, and N2 is the number of code multiplexes of a subsequent transmit block including the remaining parity bit, a spread multiplexer 104 performs spread multiplexing of each block in a relationship of N1>N2.

Abstract: In a transmission method of the present invention, when transmitting an information bit from a transmitter to a receiver, an encoder of the transmitter firstly inputs and encodes the information bit, and a modulator then modulates the encoded information bit to create a modulation symbol. A spreader spreads the obtained modulation symbol using a rotation orthogonal code having a rotation angle that is appropriate to a combination of the modulation method and the coding rate, and transmits it to a transmission path. The receiver performs a reverse operation of the transmitter, and decodes the information bit. In QPSK modulation where the coding rate of an error-correction code is ½, when a rotation angle that obtains a same signal point as OFDM is 0°, spreading is performed using a rotation orthogonal code having a rotation angle of between 17° and 45°, or between ?17° and ?45°, thereby reducing bit error and enabling highly-reliable communication to be achieved.

Abstract: A receiver informs a delay profile and CIR measured in an FDE or a Rake receiver, together with a bit error rate of a received signal that is required in a receiver, as quality information to a transmitter. In the transmitter, based on the delay profile and CIR contained in the notified quality information, a number of code division multiplex and a frame format are decided in a decision circuit such that a bit error rate of a received signal, which is necessary on the receiver side, can be obtained. In addition, a transmission selection switch selects one of a unique word insertion unit and a cyclic prefix insertion unit that create a frame format for FDE reception and a pilot insertion unit and a complex scrambling unit that create a frame format for Rake reception, and data is then transmitted.

Abstract: A receiver informs a delay profile and CIR measured in an FDE or a Rake receiver, together with a bit error rate of a received signal that is required in a receiver, as quality information to a transmitter. In the transmitter, based on the delay profile and CIR contained in the notified quality information, a number of code division multiplex and a frame format are decided in a decision circuit such that a bit error rate of a received signal, which is necessary on the receiver side, can be obtained. In addition, a transmission selection switch selects one of a unique word insertion unit and a cyclic prefix insertion unit that create a frame format for FDE reception and a pilot insertion unit and a complex scrambling unit that create a frame format for Rake reception, and data is then transmitted.