Abstract: A wireless communication system includes a terminal station and a plurality of base stations. The terminal station includes a received power measuring unit that measures a power of radio signals transmitted from the base stations, and a combined signal selector that selects a combined signal used for diversity combining, an interference signal suppression controller that generates a transmission power suppress command based on a received power difference between the combined signal and an interference signal not having been selected as the combined signal, and a transmission processor that outputs the command to the base stations. The base station suppresses the transmission power for the terminal station by a predetermined attenuation amount when receiving the command.

Abstract: A setting unit (4) determines basic information on a modulation method, a coding ratio, and a puncturing rule based on a quality signal at each base station (5) that is measured at a mobile station (12). A transmission control unit (6) of each base station (5) determines the modulation method, the coding ratio, and the puncturing rule for each of the base stations (5) according to the basic information and the signal quality of each base station (5). Based on this determination, a code selection unit (7) executes puncturing, an interleave unit (8) executes interleave, and a modulation unit (9) executes modulation. In the mobile station (12), based on the modulation method, the coding ratio, and the puncturing rule included in a control signal from each base station, a demodulation unit (15) executes a demodulation processing, a deinterleave unit (16) executes a deinterleave processing, and a code combining unit (17) executes code combining.

Abstract: Data hopping means is provided with a hopping generation unit 21 and a data selection unit 23, the hopping pattern generation unit 21 generating a predetermined hopping pattern, and the data selection unit 23 outputting a plurality of subcarrier transmission signals corresponding to respective subcarriers, by receiving transmission data and outputting only the data carried in the subcarrier designated by the hopping pattern as the subcarrier transmission signal, while maintaining the other subcarrier transmission signals at a zero output level. Inverse Fourier transform means subjects the entirety of subcarrier reception signals output from the data selection unit 23 to inverse Fourier transform and outputs frequency-hopped spread-spectrum transmission signals.

Abstract: A transmitting apparatus adds a common pilot symbol and known series for each data slot of a subcarrier group. A receiving apparatus combines SIR calculation values obtained for each subcarrier group, and averages the SIR calculation values. Based on this, it is possible to obtain a high-precision SIR calculation value even when there is a level fluctuation such as shadowing.

Abstract: A path detector (105) detects multipath waves on a transmission line based on a plurality of despread signals corresponding to fixed directional beams. An adaptive beam forming section (106-1 to 106-L) forms an adaptive beam combined signal for each path, using a weight generated by an adaptive algorithm and the despread signals. An adder (107) combines the adaptive beam signals for all paths, and a data judging section (108) judges data included in the combined signal.

Abstract: Disclosed is an image display system which provides a display by joining projected images together, comprising a plurality of projecting means for projecting images, display means for displaying a single image by joining the images from the projecting means together, dividing means for dividing the images projected by the projecting means into a plurality of processing unit areas, and correction processing means for performing correction processing for each of the processing unit areas, wherein the processing unit areas differ in size between joint portions of the images projected by the projecting means and other portions than the joint portions.

Abstract: A path detector (140) detects a plurality of multi-path waves that have satisfied a predetermined standard from reverse spread signals, a plurality of adders (161) form beams on the basis of a path, a plurality of transfer path estimating sections (170) and complex conjugate calculators (163) calculate a transfer path estimation value, and based upon the result of the estimation, carry out a weighting process in accordance with the signal amplitude and a removing process of the phase variations. Moreover, a plurality of interference amount estimating sections (171) extract the amount of interference, a plurality of normalizing sections (172) normalize the signals that have been subjected to the phase variation removing process based upon the amount of interference, an adder (185) combines all the signals that have been normalized, and a data determining section (190) determines the signal that have been combined.

Abstract: The transmitter comprises a data/modulation control section (4) which sets predetermined parameters necessary for demodulation processing, sub-carrier group modulation processing sections (6a to 8c) which perform frequency spreading for each sub-carrier signal in the sub-carrier group, and time spreading sections (10a to 10c) which multiplex all signals after the modulation processing and the frequency spreading for each sub-carrier signal, and perform time spreading with respect to the multiplexed signals. The receiver comprises time despreading sections (35a to 35c) which perform time despreading for each sub-carrier signal, and sub-carrier group demodulation processing sections (36a to 38c) which perform frequency despreading for each sub-carrier signal after the time despreading.

Abstract: In a communication system using the time diversity transmission scheme, the communication system provided with the stable automatic frequency control circuit with the wide frequency pull-in range and under low CN ratio transmission is achieved by removing the modulation phase from the received data through the application of the data correlation of the time diversity.

Abstract: A communication control unit in accordance with the present invention comprises a channel quality detection unit that includes a differential block for calculating a double differential phase by performing a plurality of times differential on a received signal and a signal lagging behind the received signal by a predetermined time, a frequency calculation block for calculating a frequency by which the double differential phase falls into a pseudo-error area within a predetermined observation time, and a quality index calculation block for calculating an index of the quality of a channel on the basis of an output of the frequency calculation block, and that calculates an index of the quality of a channel employed using a received signal, a quality decision unit for deciding from the result of channel quality index calculation performed on the channel employed which is provided by the channel quality detection unit whether or not a channel is good, a control unit for controlling the channel according to the res

Abstract: A diversity receiver. Antennas are provided for respective branches. Each of the antennas generates a branch signal by receiving a radio signal through a radio signal path. The paths are different from each other. A reliability extraction circuit is provided to extract the reliability information of respective branch signals from them during an observation period. The observation period is set such that the radio signal paths appear to be equivalent to white noise Gaussian transmission paths, regardless of the occurrence of fading. Normally, the observation period is sufficiently shorter than a variance period of the branch signals due to the fading. After extracting the reliability information, weights for the respective branch signals are determined on the basis of the reliability information. The branch signals are linearly combined in accordance with the weights, and the signal thus obtained is output. As the reliability information, probability information are available.