A method of transmitting uplink signal through a Physical Uplink Shared Channel (PUSCH) by a mobile device in a wireless communication system. The method includes generating multiplexed information by multiplexing a first type of control information and data information; and transmitting the multiplexed information and a second type of control information through the PUSCH. One or more Resource Blocks (RBs) for the PUSCH include N Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols in a slot. The multiplexed information is mapped on a first set of SC-FDMA symbols, and the first set of SC-FDMA symbols includes SC-FDMA symbols other than an (N−3).sup.th SC-FDMA symbol for a reference signal in the slot. The second type of control information is mapped on (N−4).sup.th and (N−2).sup.th SC-FDMA symbols in the slot, and the second type of control information includes Acknowledgement/Negative Acknowledgement (ACK/NACK) information.

A method of transmitting uplink signal through a Physical Uplink Shared Channel (PUSCH) by a mobile device in a wireless communication system. The method includes generating multiplexed information by multiplexing a first type of control information and data information; and transmitting the multiplexed information and a second type of control information through the PUSCH. One or more Resource Blocks (RBs) for the PUSCH include N Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols in a slot. The multiplexed information is mapped on a first set of SC-FDMA symbols, and the first set of SC-FDMA symbols includes SC-FDMA symbols other than an (N−3).sup.th SC-FDMA symbol for a reference signal in the slot. The second type of control information is mapped on (N−4).sup.th and (N−2).sup.th SC-FDMA symbols in the slot, and the second type of control information includes Acknowledgement/Negative Acknowledgement (ACK/NACK) information.

There is provided a signal transmission device including reception processing units for respective channels, so as to enable multichannel transmission by dividing frequency bands. The total number of channels is equal to or greater than three. When full-duplex two-way communication is applied in any combination of two channels, one of reception processing unit include a signal suppressing unit configured to suppress a signal component of a channel other than a self channel.

There is provided a signal transmission device including reception processing units for respective channels, so as to enable multichannel transmission by dividing frequency bands. The total number of channels is equal to or greater than three. When full-duplex two-way communication is applied in any combination of two channels, one of reception processing unit include a signal suppressing unit configured to suppress a signal component of a channel other than a self channel.

A wireless communication apparatus configured to select an allocation system for transmission symbols on the basis of transmission line situations between the wireless communication apparatus and terminals includes a channel estimator to estimate transmission line coefficients between communication target terminals and sub-arrays, a resource scheduler to generate, on the basis of the transmission line coefficients, mapping information and transmission weight information by spatial multiplexing and frequency multiplexing and select and output the mapping information and the transmission weight information by one of the multiplexing systems, a symbol mapper to map transmission symbols on a frequency axis on the basis of the mapping information from the resource scheduler, and a pre-coder to perform, on the basis of the transmission weight information from the resource scheduler, a weighting operation concerning a signal mapped by the symbol mapper.

A wireless communication apparatus configured to select an allocation system for transmission symbols on the basis of transmission line situations between the wireless communication apparatus and terminals includes a channel estimator to estimate transmission line coefficients between communication target terminals and sub-arrays, a resource scheduler to generate, on the basis of the transmission line coefficients, mapping information and transmission weight information by spatial multiplexing and frequency multiplexing and select and output the mapping information and the transmission weight information by one of the multiplexing systems, a symbol mapper to map transmission symbols on a frequency axis on the basis of the mapping information from the resource scheduler, and a pre-coder to perform, on the basis of the transmission weight information from the resource scheduler, a weighting operation concerning a signal mapped by the symbol mapper.

An optical signal transmission system and method of allocating center frequencies of intermediate frequency (IF) carriers in a frequency division multiplexing (FDM) optical fiber link. The optical signal transmission method includes determining a center frequency interval between modulated signals based on a bandwidth of the modulated signals or a center frequency of a modulated signal having a lowest center frequency, among the modulated signals, reallocating center frequencies to the modulated signals based on the center frequency interval between the modulated signals, and converting the modulated signals reallocated the center frequencies from electrical signal into optical signal and transmitting the optical signal.

A method for multiplexing a data information stream, including a systematic symbol and a non-systematic symbol, and a control information stream of at least three types in a wireless mobile communication system is disclosed. The method includes mapping the data information stream to a resource area so that the systematic symbol is not mapped to a specific resource area to which the control information stream is mapped, and mapping the control information stream to the specific resource area.

A method for multiplexing a data information stream, including a systematic symbol and a non-systematic symbol, and a control information stream of at least three types in a wireless mobile communication system is disclosed. The method includes mapping the data information stream to a resource area so that the systematic symbol is not mapped to a specific resource area to which the control information stream is mapped, and mapping the control information stream to the specific resource area.

A method of searching for the presence of a useful signal of predefined spectral width ΔB in a multiplexing band having a spectral width greater than ΔB, includes calculating a frequency signal representative of a power spectral density in the multiplexing band, calculating a non-useful signal by filtering the frequency signal by means of a filter capable of suppressing all or part of signals having a spectral width equal to or smaller than ΔB, calculating a power ratio signal representative of the ratio of the frequency signal to the non-useful signal, and comparing the power ratio signal with a predefined threshold value. The method may be employed using a computer program product, a receiver unit, and/or a station of a digital telecommunications system comprising such a receiver unit.