Abstract: A wireless communication apparatus is equipped with a plurality of antennas. A switch leads a received signal by way of an antenna selected according to an antenna switching signal to a demodulator unit. Software installed in a MAC unit generates a first switching signal. A diversity control unit generates a second switching signal by the built-in hardware circuit. The first switching signal is used as an antenna switching signal during a packet receiving ready period, while the second switching signal is used as an antenna switching signal during a period for receiving a packet.

Abstract: It is an object of the present invention to provide a gain control circuit capable of reducing convergence time needed to stabilize the output level changing due to the fluctuations of an input level, maintaining the convergence time constant even if a signal with a different level is inputted to a variable gain amplifier and easily modifying a setting value even if the gain characteristic of the variable gain amplifier changes. A gain control unit normally adjusts the gain of a VGA according to a difference computed by a computation unit. If an input signal with a high level is inputted to the VGA immediately after receiving a packet and the output level of the VGA exceeds the threshold value of a step-down unit, the gain of the VGA can be forced to reduce by a prescribed value.

Abstract: In a vehicle backward movement assisting apparatus for in-line parking, at a stop position of a vehicle, a seesaw switch is manipulated until an in-line guide line is superimposed on a target point which is a corner of a frame of a parking space, and a steering wheel is turned until the vehicle space mark is superimposed on the parking space, and the vehicle is moved backward while the steering angle of the steering wheel is held. When an eye mark is superimposed on the parking space, the vehicle is stopped, and the steering angle of the steering wheel is made maximum and the vehicle is moved backward, to thereby complete the in-line parking at the parking space.

Abstract: A steering assist apparatus includes a camera for picking up the rear side of a vehicle, a monitor disposed in a driver's compartment of the vehicle, a steering angle sensor for detecting a steering angle of a steering wheel, and a display controlling unit for displaying on the monitor an image through said camera when the vehicle reverses and for superimposing and displaying on said monitor a guide display for assisting the drive of the vehicle when the vehicle is to be parked. The guide display includes a steering start guide line fixedly displayed in a predetermined position of an image field of the monitor for guiding a steering start position for parking, and a steering amount guide mark moved and displayed along the steering start guide line on the image field of the monitor in correspondence with a steering angle of the steering wheel detected by the steering angle sensor.

Abstract: In a vehicle backward movement assisting apparatus for in-line parking, at a stop position of a vehicle, a seesaw switch is manipulated until an in-line guide line is superimposed on a target point which is a corner of a frame of a parking space, and a steering wheel is turned until the vehicle space mark is superimposed on the parking space, and the vehicle is moved backward while the steering angle of the steering wheel is held. When an eye mark is superimposed on the parking space, the vehicle is stopped, and the steering angle of the steering wheel is made maximum and the vehicle is moved backward, to thereby complete the in-line parking at the parking space.