Abstract: In a telecommunication network, the power of a first signal transmitted via a satellite by a first station to be received in the form of a second signal by a second station is regulated. At a given time, a value representative of a signal-to-noise ratio of the second signal is predicted for a later time, and, at an intermediate time, the power of the first signal is regulated in the first station as a function of the predicted value. The intermediate time precedes the later time by a time period substantially equal to the propagation time between the first and second stations.

Abstract: Methods and systems for estimating Supervisory Audio Tone (SAT) strength during data transfer and for a short time period thereafter. The SAT during this period is regarded as being identical to the strength measured just before the data transfer was started. In an alternative embodiment, a probabilistic algorithm can be used wherein previous measurements are used to predict the SAT strength during and for a period after data transfer. Where the present invention is used in a mobile radio telecommunications system of the type in which analog information is transmitted between at least one base station and a number of mobile stations, a method for supervising the quality of a connection between the base station and a mobile station includes transmitting data between the base station and the mobile station during which a SAT is not transmitted and using pre-data transfer SAT measurement for radio transmission quality supervision during at least a time period of said data transmitting step.

Abstract: A level of system self-organization in a wireless communication system is provided using a combined design, planning and verification process to determine system organization parameters. The process determines the parameters based on a measured path loss-related characteristic, such as path loss or bit error rate, between base stations and a plurality of regions in a coverage area. For each region, the characteristic is measured to each base station irrespective of the proximity between the region and the base stations. The measured characteristics enable the prediction of signal strength received at the regions of signals transmitted by the base stations independent of the region location. Accordingly, the characteristics can be measured without information correlating the absolute geographic locations of the regions.

Abstract: An SSB radio receiver having an inexpensive wide-band IF filter which passes through not only a reception objective SSB station IF signal but also an interference SSB station IF signal simultaneously. These signals are SSB-detected to reproduce the original modulating audio signals with a BFO frequency, the BFO frequency itself located out of the pass-band of the wide-band IF filter. The frequency of the reception objective SSB station IF signal is selected to be nearest to the BFO frequency, preferably at an end of the pass-band width of the IF filter. Frequency spectrums of the SSB-detected audio signals are separated by a frequency difference comprising the difference between the BFO signal and the IF signals. The SSB-detected audio signals are applied to a selected low-pass filter, such as an inexpensive active filter, having a pass-band which covers or passes only the SSB-detected audio signal of the reception objective SSB station IF signal.

Abstract: An FM text-based multiplex broadcasting receiver includes a memory in which an identity code is written, a determining circuit for determining whether or not an identity code which coincides with the identity code written in the memory is contained in the received broadcast, a device for disclosing a keyword having a one-to-one correspondence with the identity code written in the memory, and a display element which cannot receive information services based on data that requires a contract when the determining circuit does not detect that the identity code written in the memory is contained in the received broadcast and which displays information based on data that requires a contract when the determining circuit detects that the identity code written in the memory is contained in the received broadcast.

Abstract: In a radio communication system, when an interconnection between radio terminal (PS) used for digital cordless telephones is performed, a connection destination terminal is discriminated in accordance with input information. If it s determined that the connection designation terminal is a terminal involved in the interconnection, a priority-monitor-target communication channel is figured out in accordance with a PS call number of the destination. When the priority-monitor-target communication channel is not used, transmission of call-origination control signal is started by using the idle priority-monitor-target communication channel. That is, the call-original control signal is transmitted by preferentially using the priority-monitor-target communication channel which is frequently monitored by the destination terminal.

Abstract: There is disclosed a system and method for accessing a cellular telecommunications network serving a plurality of normal subscribers and a plurality of fixed subscribers. The normal and fixed subscribers access the system through a plurality of cells and a plurality of base stations electronically connected to a mobile switching center (MSC). Each of the base stations transmits radio frequency signals over a coverage area defining one of the cells. The system differentiates during system access the normal subscriber from the fixed subscriber. The system permits the normal subscriber access to the system through any one of the plurality of cells. The system permits the fixed subscriber restricted call setup to the system through a fixed subscription area (FSA) defined for the fixed subscriber to include at least one of the cells.

Abstract: A portable transceiver includes a transceiver body including a microphone, and an earphone including an earphone body physically separated from the transceiver body when in use, and a cord. The cord has one end connected to the transceiver body and the other end connected to the earphone body. A communication cable extends between the transceiver body and a portable wireless means. A holder is releasably secured to the communication cable so as to hold the earphone body in position. The earphone is thus integral with the transceiver body when not in use and can be carried with the transceiver without the need to store the earphone in a user's pocket. This allows the user to have ready access to the earphone whenever necessary.

Abstract: A mobile radio communications system which keeps operational even when the signal reception conditions deteriorate due to interference. Mobile stations in the system communicate through radio communication channels via a base station. A plurality of interference monitor stations are fixedly placed in the service zone of the base station. The interference monitor stations, being wired to the base station via telecommunications lines, constantly monitors transmission signals sent from the base station. A reception condition monitoring unit watches the reception conditions of the transmission signals to detect interference. If any interference is detected, an interference detection signal output unit sends an interference detection signal to the base station via the telecommunications lines. Upon reception of the interference detection signal, a carrier switching controller forces a carrier of the transmission signal to be switched to another carrier after confirming predefined conditions.

Abstract: A power supply unit with a switch-on/off facility for powering radio equipment, which includes input portion having a plurality of keys, power generating circuit for generating power and switch which is connected to the power generating circuit for turning on and off power to the radio equipment. The power supply unit further includes disabling portion for disabling. the turn-on and the turn-off of said switching means in response to operation of a predetermined key of the input means.

Abstract: A facility is provided for more efficiently controlling transmitted power in a forward link of CDMA telecommunications system. This is done by offsetting a power reference level that adjusts the level of the transmitted power using an power offset selected as a function of a transmission rate specified for the transmission of a coded frame. The coded frame is then transmitted at a power level selected as function of the adjusted power reference level, rather than the unadjusted level. Such efficiently is particularly noticeable when there is transition from one frame transmission rate to another such rate and vice-versa.

Abstract: A communication device locates a wireless service provider in a multi-service provider environment using a frequency band search schedule. The frequency band search schedule has a first or home band and a several other frequency bands in a predetermined order. The order of the frequency bands may be programmed by the user or by a home service provider over the air. The communication device searches for an acceptable service provider by examining the home band and then the other bands listed in the frequency band search schedule. The bands are examined in the order specified by the frequency band search schedule. An acceptable service provider is identified by comparing the identity of a service provider specified by an identifier received from a band being examined with a list of acceptable service providers.

Abstract: The invention provides a method of regulating the power of transmission between first and second stations in a multiple satellite visibility satellite telecommunication network. The method comprises the following cyclic steps: regulation, for each of said N channels, of an isolated transmit power level command signal such that when it commands the power at which the first station transmits the first isolated signal in each channel the quality level of the corresponding isolated second signal received by the second station is equal to a reference quality level, and regulation, for all of the N channels, of N combined transmit power level command signals such that when they command the levels at which the first station respectively transmits the N first combined signals on the N channels the quality level of the global signal received formed from the N combined second signals is equal to the reference quality level.

Abstract: A cellular communication system has a plurality of cells and a plurality of channels. The plurality of channels includes a plurality of measurable channels for which interference can be measured in both uplink and downlink directions and a plurality of unmeasured channels for which interference are not made in both uplink and downlink directions. The measurable channels, designated probe channels, may be channels for use in a digital system. The unmeasured channels may be channels for use in an analog system, or broadcast channels. A method and apparatus for allocating the plurality of channels comprises initially organizing the plurality of channels into a plurality of channel groups, wherein each channel group includes at least one probe channel, and wherein at least one of the channel groups further includes at least one unmeasured channel.

Abstract: A small, high Q loop antenna configured on a printed circuit board as a planar structure receives a radio signal and shields its interior planar area against interfering electric field energy while concentrating therein radio signal magnetic flux. A magnetic pickup loop, coplanar to the antenna loop and magnetically coupled thereto, receives the radio signal power by virtue of its magnetic coupling to the loop antenna. The magnetic pickup loop couples to a receiving device and delivers the radio signal thereto. Illustrated embodiments include loop antennas tunable to a desired resonant frequency.

Abstract: A method for communicating on a direct mode channel on which there is at least one communicating first radio unit, and a second radio unit which is equipped with a memory and which seeks to communicate on the direct mode channel with an intended transmit power.

Abstract: A power supply unit with a switch on/off facility for powering radio equipment is disclosed. The power supply unit includes an input portion having keys, a power generating circuit for generating power, and a switch connected to the power generating circuit for turning on and off the power to the radio equipment. The power supply unit further includes a disabling portion for disabling the on/off switch in response to operation of a predetermined one of the input portion keys.

Abstract: A dual band filter network for a radio communication apparatus is provided. The network has an antenna (212) for receiving and transmitting signals from a first frequency band and a second frequency band. The network has a first duplex pair (202) including a first transmit filter (204) including a first passband and stopband. The first duplex pair (202) also includes a second receive filter (206). The first filter (204) presents a consistent phase in the second passband due to the wide frequency separation between the first filter (204) and the second filter (206). The network has a second duplex pair (202') with similar characteristics as the first duplex pair (202). The network also has a switching circuitry (210) controlled by a switch control voltage (214) for selecting the appropriate filter circuitry. The network can be provided in a small sized, low cost package that also offers improved insertion loss performance.

Abstract: A channel assignment system allocates channels to various cells by the optimal partitioning of the available radio frequencies into non-overlapping sets, the optimal grouping of co-user cells, and the best allocation of the former to the latter. Maximization of traffic handling capacity is, for one embodiment, expressed as the maximization of a bottleneck capacity ratio, known as the capacity factor. The capacity ratio for a cell is defined as the ratio of the number of radio frequencies allocated to the cell over the number of radio frequencies needed to meet blocking probability requirements. Given a channel allocation, the latter is fixed once the traffic loads and desired blocking are specified. The solution to attain an optimal non-regular channel assignment is decomposed into two mathematical programs designated a Master Program and a Subprogram. These are solved iteratively with assistance from a channel set augmentation technique implemented between solutions of the Master and Subprogram.

Abstract: A local multipoint distribution system having a head end coupled to a plurality of base stations with each base station constituting a cell. Each base station has a plurality of sector beam antennas, each sector beam antenna illuminating a predetermined sector of the cell with RF communication signals. A plurality of RF subscriber stations for each sector of a cell, with each subscriber station having a high gain antenna with a narrow beam width oriented toward the sector beam antenna oriented toward its assigned sector. Time division multiple access control is provided at each subscriber station operated such that each subscriber transmits at a time different from the other subscribers in its sector so that the subscribers in a given sector do not interfere with each others' transmissions, respectively. The power level transmitted by the subscribers are adjusted or controlled so that the subscriber signals arrive at the respective base stations at about the same power level.