1843 results about "Improvement methods" patented technology

A driving skill improvement device capable of providing appropriate information to a driver and effectively improving the driving skill of the driver from the perspective of vehicle movement is provided. The driving skill computing block 3 computes an ideal vehicle movement state and performs driving skill evaluation based on vehicle information detected by a vehicle information detecting block 1 and information or the like of an obstacle detected by an external information acquiring block 5, and in accordance with a mode selected by the mode selecting block 2, controls an information presenter 4 so as to present information to the driver.

A code-division-multiple-access (CDMA) system employing spread-spectrum modulation. The CDMA system has a base station (BS), and a plurality of subscriber units. The signals transmitted between the base station and subscriber unit use spread-spectrum modulation. The improvement method for adaptive reverse power control (APC) from a subscriber unit (SU) to a base station (BS), comprises the steps of sending from the subscriber unit, using spread-spectrum modulation, a SU-spreading code on a reverse channel. The base station despreads the SU-spreading code on the reverse channel as a despread signal, determines a first power level Pd which includes power of the despread signal plus noise and a second power level PN, which includes despread-noise power. The base station determines a first error signal e1, from the first power level Pd, the second power level PN, and a required signal-to-noise ratio SNRREQ for service type, and a second error signal e2, from a measure of total received power Prt at the base station, and an automatic gain control (AGC) set point Po. The base station forms a combined error signal from the first error signal e1, the second error signal e2, a first weight a1, and a second weight a2, and hard limits the combined error signal to form a single APC bit. The APC bit is transmitted to the subscriber unit. In response to the APC bit, the subscriber adjusts transmitter power to the base station.