Abstract: A signal generating apparatus includes a spreading device that respectively spreads data using spreading code that is based on an initial phase; a multiplexing unit that code multiplexes the data spread by the spreading device; a calculating unit that calculates a peak of a signal resulting from code multiplexing by the multiplexing unit; a changing unit that changes the initial phase of the spreading device in a predetermined order; a determining unit that each time the initial phase is changed by the changing unit, determines whether the peak calculated by the calculating unit is at most a threshold; and a transmission control unit that outputs the signal, if the determining unit determines that the peak is less than or equal to the threshold.

Abstract: A wireless communication device that obtains an analog received signal by receiving a wireless signal, adjusts amplitude by a variable gain amplifier, converts the analog received signal into a digital received signal by an A/D converter and obtains user data by demodulating the digital received signal, including: a received signal strength indication detecting section that detects a received signal strength indication that fluctuates over time; a gain controlling section that controls a gain of the variable gain amplifier; a propagation environment judging section that judges a propagation environment level of the wireless signal, and a time constant controlling section that controls a time constant, based on the judged propagation environment level such that the time constant becomes larger as the propagation environment level becomes lower, the time constant regulating a change speed of the gain at the variable gain amplifier.

Abstract: A signal generating apparatus includes a spreading device that respectively spreads data using spreading code that is based on an initial phase; a multiplexing unit that code multiplexes the data spread by the spreading device; a calculating unit that calculates a peak of a signal resulting from code multiplexing by the multiplexing unit; a changing unit that changes the initial phase of the spreading device in a predetermined order; a determining unit that each time the initial phase is changed by the changing unit, determines whether the peak calculated by the calculating unit is at most a threshold; and a transmission control unit that outputs the signal, if the determining unit determines that the peak is less than or equal to the threshold.

Abstract: A wireless communication device that obtains an analog received signal by receiving a wireless signal, adjusts amplitude by a variable gain amplifier, converts the analog received signal into a digital received signal by an A/D converter and obtains user data by demodulating the digital received signal, including: a received signal strength indication detecting section that detects a received signal strength indication that fluctuates over time; a gain controlling section that controls a gain of the variable gain amplifier; a propagation environment judging section that judges a propagation environment level of the wireless signal, and a time constant controlling section that controls a time constant, based on the judged propagation environment level such that the time constant becomes larger as the propagation environment level becomes lower, the time constant regulating a change speed of the gain at the variable gain amplifier.

Abstract: In a radio communication system (1), a base station (3) broadcasts, to mobile stations (2-1 to 2-n: n represents a natural number), a compensation parameter needed for compensation for a possible error in detection of a received signal strength indicator, occurring in the terminal stations (2-i: i=1 to n) due to a difference in transmission signal waveform to the terminal stations (2-i), and in the terminal stations (2-i), a received signal strength indicator compensating section (23-5) compensates for the received signal strength indicator detection error in a received signal strength indicator detecting section (22-10) on the basis of the compensation parameter broadcasted therefrom. This considerably improves the accuracy of the received signal strength indicator detection in the terminal stations (2-i).

Abstract: In a power control circuit according to the present invention, a circuit for making a desired response at a specific level is stationarily fed with a signal at the specific level so that the resultant level deviation is automatically corrected at a stage subsequent to the circuit. Besides, a transmitter according to the present invention is configured with provided a modulator as the above-described circuit. In a system or equipment according to those inventions, without its configuration being changed drastically, the desired characteristics and performances are kept with high accuracy, the cost for the manufacture, maintenance, and running is reduced, and the overall reliability is improved.

Abstract: In a radio communication system (1), a base station (3) broadcasts, to mobile stations (2-1 to 2-n: n represents a natural number), a compensation parameter needed for compensation for a possible error in detection of a received signal strength indicator, occurring in the terminal stations (2-i: i=1 to n) due to a difference in transmission signal waveform to the terminal stations (2-i), and in the terminal stations (2-i), a received signal strength indicator compensating section (23-5) compensates for the received signal strength indicator detection error in a received signal strength indicator detecting section (22-10) on the basis of the compensation parameter broadcasted therefrom. This considerably improves the accuracy of the received signal strength indicator detection in the terminal stations (2-i).