Abstract: A first reception circuit (SR1) separates a signal from a desired terminal among signals from an adaptive array antenna (#1 to #4), based on a reception weight vector calculated in a reception weight vector calculator (20.1). A remodulation circuit (32.1) generates a first replica signal from a signal of a demodulated desired wave. A replica generating circuit (40.1) multiplies signals from a plurality of antennas by a weight vector for an interfering wave from a second reception circuit (SR2), and generates a second replica signal corresponding to a signal from an interfering wave terminal. A reception response vector calculator (24.1) derives an impulse response of a propagation path of the signal from the desired terminal, based on the first and second replica signals.

Abstract: When there is a connection request to a base station supporting adaptive modulation from a terminal supporting adaptive modulation, the base station measures a D wave level that indicates communication environment of the transmission path. When the measured D wave level is not lower than a threshold value of D wave level at which communication is possible by a modulation method (16QAM) having larger multi-value number, the base station permits allocation of a wireless channel to the terminal. Therefore, even when the modulation method is switched from one having smaller multi-value number (?/4 shift QPSK) to one having larger multi-value number (16QAM) during communication after channel allocation to the terminal, degradation of communication quality due to the communication environment of the transmission path can be prevented.

Abstract: In an adaptive array terminal, at least one of two antennas (ANT#1, ANT#2) is a movable antenna. A display unit of the terminal displays reception levels of, or level difference between, the two antennas. Thus, it becomes possible for a user to adjust an angle of the antenna such that reception levels of the two antennas come closer to the same level. Alternatively, control unit of the terminal automatically adjusts the antenna angle so that reception level difference between the two antennas becomes not higher than a prescribed value.

Abstract: A radio equipment separates a signal from a specific terminal among signals from adaptive array antennas, based on a reception weight vector calculated by a reception weight vector calculator. A reception response vector calculator draws out a reception response vector of a propagation path of the signal from the specific terminal. A correlation operation and Doppler frequency estimating circuit calculates a correlation value between reception response vectors of corresponding slots of continuous frames, and estimates a corresponding Doppler frequency based on a correspondence found in advance. A transmission response vector estimator predicts a transmission response vector, by performing an extrapolation process in accordance with the estimated Doppler frequency.

Abstract: A main control unit in a radio reception apparatus selects from an adaptive array reception mode and a single route reception mode, in accordance with a prescribed condition. When the adaptive array reception mode is selected, the main control unit performs first control to operate a plurality of radio reception units and an adaptive array operational processing unit. When the single route reception mode is selected, the main control unit performs second control, so that one radio reception unit is selected as a first radio reception unit to operate and an operation of a radio reception unit other than the first radio reception unit and the adaptive array operational processing unit is stopped.

Abstract: An image transmission apparatus is provided with a FAX modem, an encoding/decoding section, a digitizer-integrated LCD, encoded image data memory, original image data memory, and additional image data memory. Original image data received by the FAX modem are temporarily stored in the encoded image data memory, and the original image data are decoded by the encoding/decoding section. The thus-decoded original image is stored in the original image data memory. An image of the thus-stored original image data is displayed on the digitizer-integrated LCD. An operator draws an additional image on the digitizer-integrated LCD. Data of the thus-drawn additional image are stored in the additional image data memory. The thus-stored additional image data are encoded by the encoding/decoding section, and the thus-encoded additional image data are temporarily stored in the encoded image data memory. Then, the encoded additional image data are sent by the FAX modem.

Abstract: A main control unit in a radio reception apparatus selects from an adaptive array reception mode and a single route reception mode, in accordance with a prescribed condition. When the adaptive array reception mode is selected, the main control unit performs first control to operate a plurality of radio reception units and an adaptive array operational processing unit. When the single route reception mode is selected, the main control unit performs second control, so that one radio reception unit is selected as a first radio reception unit to operate and an operation of a radio reception unit other than the first radio reception unit and the adaptive array operational processing unit is stopped.

Abstract: In an adaptive array terminal, at least one of two antennas is a movable type antenna. The correlation value of respective reception signals of the two antennas is displayed on a display unit of the terminal. Accordingly, the user can adjust the antenna angle such that the correlation value of the reception signals of the two antennas becomes smaller. Alternatively, the control unit of the terminal can automatically adjust the antenna angle such that the antenna correlation value of the two antennas becomes lower than a predetermined value.

Abstract: On a signal received by an antenna (1, 2), an adaptive array processing is performed by a DSP to obtain an array output. A reception timing control unit (30). shifts sampling timing of a reception signal by an A/D converter (3, 4) while monitoring MSE between the array output and the reference signal, and determines an optimal sampling point (reception position) at which the sampling error is minimized.

Abstract: A radio receiving system has a plurality of interference cancelers. Received signals are separated and demodulated by an adaptive array (AA), a parameter estimating section (PE), and a detector (DE) of each of the interference cancelers into the signals of the respective users and outputted from a processing circuit (200) lastly. A demodulated signal demodulated without any demodulation error is removed from the received signals, the interference due to the user signal is removed, and the resultant received signals are sent to the next interference canceler. Users are assigned to the same time slot in such a way that the difference between the reception powers of the user signals are as large as possible. Thus at least one of the user signals is demodulated without any error by each interference canceler and removed from the received signals. Therefore, the signal of each user can be extracted reliably by this radio receiving system of the PDMA method.

Abstract: A slot of a low multiplicity is processed to narrow transmission timing intervals for already-connected users and thereby to make preparation for a new user, and a slot of a high multiplicity is processed to keep the maximum transmission timing intervals for the already-connected users so that the preparation for the new user is not performed. As a result, it is possible to provide the slot prepared for the new user while maximizing the transmission timing intervals. Further, the transmission timing intervals for the already-connected users are kept as large as possible during the traffic channel for preventing the deterioration of characteristics, and the shifting of the transmission timing is performed for the new user during the control channel so that the optimum transmission timing intervals can be achieved when the traffic channel is established. A DSP (14) executes the processing.

Abstract: A first reception circuit (SR1) separates a signal from a desired terminal among signals from an adaptive array antenna (#1 to #4), based on a reception weight vector calculated in a reception weight vector calculator (20.1). A remodulation circuit (32.1) generates a first replica signal from a signal of a demodulated desired wave. A replica generating circuit (40.1) multiplies signals from a plurality of antennas by a weight vector for an interfering wave from a second reception circuit (SR2), and generates a second replica signal corresponding to a signal from an interfering wave terminal. A reception response vector calculator (24.1) derives an impulse response of a propagation path of the signal from the desired terminal, based on the first and second replica signals.

Abstract: An image transmission apparatus is provided with a FAX modem, an encoding/decoding section, a digitizer-integrated LCD, encoded image data memory, original image data memory, and additional image data memory. Original image data received by the FAX modem are temporarily stored in the encoded image data memory, and the original image data are decoded by the encoding/decoding section. The thus-decoded original image is stored in the original image data memory. An image of the thus-stored original image data is displayed on the digitizer-integrated LCD. An operator draws an additional image on the digitizer-integrated LCD. Data of the thus-drawn additional image are stored in the additional image data memory. The thus-stored additional image data are encoded by the encoding/decoding section, and the thus-encoded additional image data are temporarily stored in the encoded image data memory. Then, the encoded additional image data are sent by the FAX modem.

Abstract: An image transmission apparatus provided with a FAX modem, an encoding/decoding section, a digitizer-integrated LCD, encoded image data memory, original image data memory, and additional image data memory. Original image data received by the FAX modem are temporarily stored in the encoded image data memory, and the original image data are decoded by the encoding/decoding section. The thus-decoded original image is stored in the original image data memory. An image of the thus-stored original image data is displayed on the digitizer-integrated LCD. An operator draws an additional image on the digitizer-integrated LCD. Data representing the thus-drawn additional image are stored in the additional image data memory. The thus-stored additional image data are encoded by the encoding/decoding section, and the thus-encoded additional image data are temporarily stored in the encoded image data memory. Then, the encoded additional image data are sent by the FAX modem.

Abstract: A radio equipment separates a signal from a specific terminal among signals from adaptive array antennas, based on a reception weight vector calculated by a reception weight vector calculator. A reception response vector calculator draws out a reception response vector of a propagation path of the signal from the specific terminal. A correlation operation and Doppler frequency estimating circuit calculates a correlation value between reception response vectors of corresponding slots of continuous frames, and estimates a corresponding Doppler frequency based on a correspondence found in advance. A transmission response vector estimator predicts a transmission response vector, by performing an extrapolation process in accordance with the estimated Doppler frequency.

Abstract: A handwriting stroke information encoder capable of reducing costs resulting from communication and storage of encoded data by reducing the amount of the encoded data. The handwriting stroke information encoder is provided with a processor which calculates forecast coordinates from sampled coordinates to be encoded and coordinates sampled before the sampling of the sampled coordinates, and an encoder which encodes the differences between the forecast coordinates and sampled coordinates of an actual input. The coordinates are forecast as; e.g., coordinates that are in line with the extension of vector, which are connecting together the previously-sampled coordinates and coordinates sampled prior to the previously-sampled coordinates, and are spaced the magnitude of the vector away from the previously-sampled coordinates.

Abstract: A communications apparatus which has a man/machine interface to prevent or dissuade a user from performing a wasteful calling operation. In one implementation, the communications apparatus is suitable for transmission and reception and includes a display unit for displaying a content associated with a communication operation, a detector for checking whether a communication is available based upon a reception signal, and a display controller for inhibiting the unit from displaying the content when the communication is unavailable.

Abstract: A portable terminal has a portable terminal main body and an enclosure. If the enclosure is open, and if the portable terminal is in a communicating state after a power switch has been turned on, a memo mode is selected which makes it possible to take memos by input from a display panel using a pen. As a result, a memo-mode display image appears on the display, whereby it becomes possible to take memos during communication. In a portable terminal having a window formed in an enclosure, a normal-mode image is displayed as a result of the power switch being turned on even when the enclosure is closed. If the closure is open, and if the portable terminal is in a communicating state, the memo mode is selected.