摘要:
A transmitting device is a transmitting device configured to transmit a signal, and is provisioned with a determination unit configured to determine whether or not to perform a frequency clipping to remove a portion of a spectrum of the signal to transmit on the basis of a control information representing a frequency band used by the transmitting device to transmit data.
摘要:
There is implemented a clipping technique that does not require a reception apparatus or a transmission apparatus to notify a transmission apparatus or a reception apparatus of information on clipping. A wireless transmission apparatus performs clipping processing not to transmit a spectrum of part of a frequency domain signal when transmitting data to a wireless reception apparatus and determines a frequency band to be subjected to the clipping processing using information other than information notified from the wireless reception apparatus and directly specifying a frequency band to be subjected to the clipping processing.
摘要:
An encoding unit encodes an information bit sequence. An IDFT unit generates a spectrum from the signals of the information bit sequence. A clipping unit generates, when re-transmitting the information bit sequence, a transmission spectrum that differs from that of the previous transmission. An OFDM signal generation unit transmits the transmission spectrum.
摘要:
When a mobile station apparatus uses a multi-antenna, spectrum efficiency is improved with clipping performed on a transmission signal from the mobile station apparatus. There is provided a wireless control apparatus applied to a wireless communication system that performs clipping processing not to transmit a spectrum of part of a frequency domain so as to transmit and receive data, the wireless control apparatus, based on channel state information with a wireless terminal apparatus which is a destination, generates clipping information indicating a frequency domain where the clipping processing is performed and determines frequency allocation for the wireless terminal apparatus to generate frequency allocation information, and notifies the wireless terminal apparatus of the clipping information and the frequency allocation information.
摘要:
A wireless transmission device is provisioned with a communication parameter setting unit configured to group time domain signals and setting different communication parameters for each group, a clipping unit configured to perform a clipping processing in the frequency domain on at least a portion of groups of the time domain signal, and a transmitting unit configured to transmit the time domain signal after the clipping processing.
摘要:
A clipping rate is controlled in spectrum shaping according to a propagation path to thereby improve transmission characteristics and perform communication at a stable transmission rate.Propagation path characteristics are detected by a propagation path information detection unit 5 for detecting propagation path information fed back from a base station device and a water filling principle for distributing energy by a primary spectrum shaping unit 6 according to the propagation path characteristics is applied to transmission spectrum obtained by a DFT unit 4. Clipping information in secondary spectrum shaping fed back from the base station device is detected by a clipping information detection unit 7 to perform the secondary spectrum shaping by a secondary spectrum shaping unit 8. At this time, with the clipping rate by the secondary spectrum shaping unit 8, clipping rates of all transmission devices multiplexed in a scheduling unit 26 of the base station device are controlled adaptively.
摘要:
Allocation of transmission power is carried out adaptively without affecting adjacent cells. Included are a reception part that receives information from a mobile station apparatus, a transmission power determination part that determines transmission power when transmitting a wireless signal to a mobile station apparatus based on the received information, an acquisition part that acquires information about communication environment in each time channel or each frequency channel from the received information, a scheduling part that identified a time channel or frequency channel the relationship of which between transmission power and communication environment satisfies the condition for allocation and allocates transmission data and transmission power for transmission to a mobile station apparatus to a communication slot in the time channel or frequency channel, and a transmission part that transmits a wireless signal using the communication slot to which the transmission data and the determined transmission power have been allocated.
摘要:
In SU-MIMO, even when the channel state of one antenna is poor, an error ratio is improved by obtaining a transmission antenna diversity effect. A transmission apparatus 100 that has a plurality of antennas 108-1 to 108-Ntx and transmits a signal according to a MIMO (Multiple Input Multiple Output) system includes a DFT part 111 for precoding transmission data and a spectrum division part 112 for dividing a spectrum output from the DFT part 111. The divided spectrums are transmitted from the different antennas 108-1 to 108-Ntx, respectively.
摘要:
A mobile station apparatus receives the same spectra that have been transmitted from at least one first transmit antenna and a second transmit antenna. An equalization unit performs, for each of the same spectra, using spectra of subcarriers having the same spectrum placed therein, equalization of the spectrum.
摘要:
To efficiently compress the information amount for feedback when a communication apparatus sends back a result of performing discrete cosine transform on the reception quality information to a communication apparatus of a communicating destination. In a communication apparatus for transmitting feedback information generated based on a plurality of reception quality information to a communicating destination apparatus, the feedback information is a result of performing discrete cosine transform on the plurality of reception quality information, and performing respective different quantization on signal components of at least a group of samples among signal components of a plurality of samples obtained by the discrete cosine transform.