Patent
Decoding arrangements for synchronous receivers
TLDR
In this article, a decoder suitable for use in a paging receiver of the type responsive to a transmission which includes a preamble sequence followed by batches each containing a synchronization word followed by a plurality of address and/or message words is operative to detect a single synchronization word.Abstract:
In a decoder suitable for use in a paging receiver of the type responsive to a transmission which includes a preamble sequence followed by batches each containing a synchronization word followed by a plurality of address and/or message words, the decoder is operative to detect a single synchronization word. Thereafter, the decoder is powered up to search in its specific frame in each batch by means of a clock which has been synchronized with the transmission and which provides the timing for searching in the specific frame of all subsequent batches. The clock may have coarse and fine modes of timing control, the coarse mode being applicable when initial bit synchronization is being attained, and the fine mode being applied subsequently to reduce the risk of the clock drifting out of synchronization.read more
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Patent
Method of transmitting terminating call signals within a restricted duration and a base station and a portable unit for use in the same
TL;DR: In this article, a portable unit is called from a base station through a radio control channel by a succession of terminating call signals that is sent through the control channel from the base station to the portable unit for a first or restricted time duration (T1), selected in consideration of a battery saving period of battery saving operation carried out in the portable units.
Patent
Method and apparatus for detection of radioactive material
Jerry,Null Bohinc +1 more
TL;DR: In this article, a radioactive material detection apparatus consisting of a transmitter, a radiation sensor and a controller is described, where the transmitter is capable of transmitting information in correspondence with a signal.
Patent
Selective call receiver having extended battery saving capability
TL;DR: In this article, a method and apparatus for providing extended battery saving operation in a conventional selective call signaling protocol, such as the POCSAG signaling protocol includes the transmission of an ordered batch identifier code word in the first frame following a preamble transmission.
Patent
Method and apparatus for providing power conservation in a communication system
TL;DR: In this paper, a communication device consisting of a receiver for receiving the information signals, a circuit which can determine the signal quality of the received information signals and a controller that decodes the received signals, and further compares the received signal quality with a predetermined value.
Patent
Paging receiver having battery saving circuit
Sato Toshifumi,Takashi Oyagi +1 more
TL;DR: A paging receiver includes an improved battery saving circuit which reduces battery usage by powering the radio section and the waveform shaping circuitry only during intervals which include address codewords specific to the given receiver group as discussed by the authors.
References
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Patent
Battery saver for a paging receiver or the like
Ohyagi Takashi,Ichikawa Yoshio +1 more
TL;DR: A battery saving circuit for use in a portable radio communication apparatus adapted to receive a communication signal which includes a preamble and identification codes is described in this article, where the power supply is electrically connected to the receiver and waveform shaper sections.
Patent
Digital radio paging communication system
TL;DR: In this article, the transmitter generates a preamble signal, a synchronization signal, and a plurality of calling signals, which are arranged into a sequence of signals including two of the preambles separated by a measured time interval and at least one batch signal including the synchronization signal and the plurality of calls.
Patent
Battery saver circuit for use with paging receiver
TL;DR: In this paper, a battery saver circuit is proposed to prolong the energization of high power drain circuits in the event that during any periodic brief battery saving energization a valid incoming signal (a preamble or subsequent message code) is received, whereby the inclusion of a specific address code may be ascertained and the subscriber alerted.
Patent
Selective call receiver having timed power supply
TL;DR: In this article, a selective call receiver with display is described, which includes a decoder comprised of a reception controller in the form of a dedicated LSI circuit and a display controller, which, in combination, overcomes inherent weakness in each, namely the relatively large power consumption of a single chip CPU and the difficulty of reconfiguring a dedicated circuit to perform different and/or additional functions.
Patent
Battery saving circuit for paging receiver
Takashi Oda,Takeshi Nakajima +1 more
TL;DR: In this paper, a battery saving circuit for a battery powered receiver composed of a receiving section, a waveform shaping section and a control section is presented, requiring a predetermined time after being connected to the power supply to become operational.