摘要:
In a radio communication such as a radio telephone system or the like, there can be set a transmission channel which can cope with a change in a transmission capacity. While a terminal apparatus and a base station are in communication for transmitting a predetermined information using a predetermined transmission channel, a signal requesting to set other transmission channel is transmitted using a part of the predetermined transmission channel to initiate communication between the terminal apparatus and the base station through the other transmission channel.
摘要:
A point card system includes a point card having a memory section (10) with a customer ID recording area (20), a service point recording area (24), an information recording area (22), and a browse flag recording area (23). The customer ID recording area (20) records unrewritable customer identification information. The service point recording area (24) records the number of service points. The information recording area (22) records provider information supplied from a provider without physical contacts. The browse flag recording area (23) records a history of provider information browsing. A provider (1) issues a wireless point card (3) to a customer (2). The provider (1) is provided with a wireless transceiver (8) and a card reader/writer (5). The system supplies provider information to the customer by radio and detects browse history information for providing an additional profit returning service.
摘要:
In a GPS receiver and a portable communication apparatus according to this invention, demodulation timing of the GPS received signal received from a satellite in the global positioning system is controlled in accordance with transmission timing of transmitting the CDMA transmission signal to a base station in a predetermined communication system, so that the GPS received signal can be accurately demodulated, preventing radio waves which occur during transmission of the CDMA transmission signal from interfering with the GPS received signal. Thus, the GPS received signal can be demodulated without deterioration of reception quality.
摘要:
In a radio communication such as a radio telephone system or the like, there can be set a transmission channel which can cope with a change in a transmission capacity. While a terminal apparatus and a base station are in communication for transmitting a predetermined information using a predetermined transmission channel, a signal requesting to set other transmission channel is transmitted using a part of the predetermined transmission channel to initiate communication between the terminal apparatus and the base station through the other transmission channel.
摘要:
The object of the present invention is to insure the communication quality best suited to the type of data between the transmission system and the receiver. In the wireless communication system 1 for controlling the data communication quality between the transmission system 2 to transmit contents and the mobile wireless terminal 8 to receive contents from said transmission system 2 via the predetermined communication path 15, since the transmission system 2 changes the modulation system in the data output unit 13 corresponding to the type of contents to be transmitted to the mobile wireless terminal 8, the data communication quality between said transmission system 2 and the mobile wireless terminal 8 can be controlled. Thereby, the data transmission from the transmission system 2 to the mobile wireless terminal 8 can be executed according to the modulation system best suited to the type of contents holding the predetermined communication quality.
摘要:
The object of the present invention is to insure the communication quality best suited to the type of data between the transmission system and the receiver. In the wireless communication system 1 for controlling the data communication quality between the transmission system 2 to transmit contents and the mobile wireless terminal 8 to receive contents from said transmission system 2 via the predetermined communication path 15, since the transmission system 2 changes the modulation system in the data output unit 13 corresponding to the type of contents to be transmitted to the mobile wireless terminal 8, the data communication quality between said transmission system 2 and the mobile wireless.terminal 8 can be controlled. Thereby, the data transmission from the transmission system 2 to the mobile wireless terminal 8 can be executed according to the modulation system best suited to the type of contents holding the predetermined communication quality.
摘要:
While the phase of a PN code is being shifted every a predetermined number of chips, correlation values with a received code are obtained. At this point, de-spread signal levels are cumulated and correlation values are obtained. At this point, a threshold value generating circuit generates a threshold value corresponding to the cumulated value of the de-spread signal levels. In other words, as the number of additions increases, the threshold value is increased. Alternatively, the number of additions is normalized and compared with the threshold value. When the cumulated value does not exceed a predetermined threshold value, since the correlation is weak, the current phase is immediately shifted to the next phase.
摘要:
A point card system includes a point card having a memory section (10) with a customer ID recording area (20), a service point recording area (24), an information recording area (22), and a browse flag recording area (23). The customer ID recording area (20) records unrewritable customer identification information. The service point recording area (24) records the number of service points. The information recording area (22) records provider information supplied from a provider without physical contacts. The browse flag recording area (23) records a history of provider information browsing. A provider (1) issues a wireless point card (3) to a customer (2). The provider (1) is provided with a wireless transceiver (8) and a card reader/writer (5). The system supplies provider information to the customer by radio and detects browse history information for providing an additional profit returning service.
摘要:
A signal receiving apparatus of the global positioning system and a mobile wireless terminal apparatus execute the synchronization acquisition to the satellite signal at high speed and reduce the consumption of electric power. According to the present invention, since the spread spectrum signal from the base station of the cellular system, that is synchronized with the satellite signal to be transmitted from the GPS satellite, is received and based on the spread spectrum signal the system time signal as a reference signal used to synchronize with the satellite signal is generated, and receiving the satellite signal, the synchronization acquisition with the PN code in the satellite signal can be executed in a short period of time in synchronism with the system time signal. And thereby the consumption of electric power can be further reduced.