摘要:
A communication zone is defined by a plurality of cells, which are separated from one another and has respective fixed base stations. The base stations in the first cell and the last cell are capable of bidirectional communication with a mobile station, while other base stations are capable of unidirectional communication. The base stations are connected to a zone control station, which controls communications with the mobile station within the zone.
摘要:
A channel evaluator acquires a change predicted value from a known symbol, and a compensator compensates for a first symbol using the change predicted value. A demodulator restores a portion corresponding to this symbol with another subcarrier. A replica generator acquires a transmission replica of the restored symbol. The channel evaluator performs complex division on the replica with the symbol to acquire an amplitude phase ratio. A detector compares the amplitude phase ratio with an amplitude phase ratio acquired immediately previously. In case where an elimination condition is satisfied, the detector disregards the amplitude phase ratio acquired currently and uses an immediately previous value instead, an averaging unit averages amplitude phase ratios to acquire a next change predicted value, and the compensator compensates for a next symbol using the change predicted value. Hereinafter, the sequence of processes is repeated.
摘要:
A frequency multiplier is constructed to input an input signal to a transistor through an input matching circuit and to output a multiplied output signal from the transistor through a reflecting type fundamental wave signal band suppressing circuit and an output matching circuit. A transmission line produces a standing wave and is disposed between the output terminal of the transistor and the input terminal of the reflecting type fundamental wave signal band suppressing circuit. Because the voltage acting on the output terminal of the transistor consequently increases, the transistor operates at a point at which the nonlinearity of its input-output characteristic is greater and the output power of the multiplied output signal increases.
摘要:
A diversity OFDM communication is performed between a base terminal and a mobile terminal, both having a horizontal polarization antenna and a vertical polarization antenna forming two transmission channels. In the base terminal, data signals to be transmitted are divided into two channels to transmit the data signals through either one of the channels having a higher transmission performance for each sub-carrier. Common pilot signals are transmitted through both channels. The data signals received by the mobile terminal are phase-adjusted using the common pilot signals. The phase-adjusted data signals in both channels are synthesized and then demodulated.
摘要:
A packet signal, formed according to an orthogonal frequency division multiplexing (OFDM) format, received by a receiver is decoded in a decoder device of the receiver. The packet signal includes a data code and a control code having a formula for decoding the data code. The control code is first decoded and analyzed to obtain the decoding formula contained therein. The data code is decoded during a period in which the control code is being analyzed, based on plural decoding formulae one of which coincides with the decoding formula contained in the control code. Data signals decoded based on the respective decoding formulae are sent to an output selector together with the decoding formula obtained from the control code. The output selector selects a data signal which is decoded based on a decoding formula that coincides with the decoding formula obtained from the control code.
摘要:
There is provided a physical property measuring method for a TFT liquid crystal panel, includes an impedance setting step of setting the impedance between the source and drain of a TFT of the TFT liquid crystal panel to be less than or equal to a predetermined value, a voltage application step of applying a voltage that cyclically varies to a liquid crystal layer of the TFT liquid crystal panel. And the method further includes a physical property measuring step of measuring a transient current flowing through the liquid crystal layer to which the voltage that cyclically varies is applied in the voltage application step to measure physical properties of the liquid crystal layer.
摘要:
An optical apparatus includes a zoom optical system including a focus lens unit, an operation portion configured to manually and mechanically change a focal length of the zoom optical system, and a controller configured to control the focus lens unit so as to move along a track depending on an object distance in an operation of the operation portion. The controller moves the focus lens unit to a second position that is different from a first position that is a position of the focus lens unit in disconnecting a power when a first focal length that is a focal length of the zoom optical system in disconnecting the power is different from a second focal length that is a focal length of the zoom optical system in reconnecting the power.
摘要:
The optical apparatus includes an image pickup optical system including a focus lens, a controller controlling movement of the focus lens in an optical axis direction of the image pickup optical system, a shake detector detecting a shake amount of the optical apparatus in the optical axis direction, and a memory storing plural shake amounts sequentially detected by the shake detector. The controller calculates, in response to a start instruction of exposure for the image pickup and before start of the exposure, a predictive value of the shake amount for a time point of the exposure based on the plural shake amounts stored in the memory and including at least one shake amount detected after the start instruction of exposure. The controller moves the focus lens to a position corresponding to the predictive value before the start of the exposure.
摘要:
A microporous sheet suitably used as a substrate for artificial leather for its good balance in properties such as softness, abrasion resistance and the like, obtained by impregnating a non-woven fabric with an elastic polymer and then coagulating the impregnated polymer, said non-woven fabric being a blend of (a) an aromatic polyester fiber (fiber A) and (b) a polyolefin or aliphatic polyamide fiber (fiber B), which sheet is scattered with portions where the fiber A is surrounded by the elastic polymer in a bonded state and portions where the fiber B is surrounded by the elastic polymer in a not-bonded state.
摘要:
The present invention relates to a clock spring used for the steering system of an automobile or the like in which a flexible cable is utilized to make an electrical connection between a fixed member and a movable member. The clock spring includes a stationary housing; a rotor rotatably mounted to the stationary housing; the flexible cable wound in a cable accommodating portion defined between the stationary housing and the rotor; and a cover fixed to the stationary housing so as to cover the opened end of the cable accommodating portion. The improvement of this invention resides in a construction by which ribs are provided in the cable accommodating portion to restrict the flexible cable to a position more in the inner periphery of the rotor than in the outer periphery of the same.