Abstract: The test results found that the EMI impact depended on the UWB power that fell within the receiver passband. Specifically, EMI occurred when the average power in the receiver passband was approximately equal to the desired signal level of the receiver. One waveform, TW7, did not cause EMI because the average power was too low. Three waveforms, TW1, TW2, and TW6 only caused EMI when the receiver was tuned to the frequency of the UWB spectral component. Three waveforms, TW3, TW4, and TW5, caused EMI at all receiver frequencies. As noted, these tests were performed to determine the susceptibility of various RF receiver (radars and communications systems) devices to UWB signals. The tests were not intended to evaluate the use of UWB signals for jamming purposes.

Abstract: The system and method autonomously and selectively jams frequency-hopping signals in near real-time by incorporating a fundamental change in the detection and reaction technology, to provide a reaction time that is short enough, within milliseconds or less, to capture and then jam even the fastest frequency hopping radios in use today, without relying on prior art methods of using standard CPU driven technology. The system automatically determines if detected signal(s) should be jammed, and subsequently to automatically end extremely quickly activates the jamming transmitter on the frequency-hopper transmitter's frequency. Finally, the system provides a programmable user interface so that operators can set up the system to act autonomously as intended, such that operator intervention is unnecessary when the system is placed in jamming operation mode.

Abstract: the invention shows a jamming device having a transmitting system that outputs a signal frequency modulated that inhibits a low power receiving antenna from receiving a fixed frequency such as a cellular telephone. The jamming device can function as a stand alone device or be incorporated into existing electrical systems whereby energizing said electrical system will cause said jammer to inhibit the use of low power radio transmission/reception devices such as cellular phones.

Abstract: A request to access the network sent by a terminal is intercepted and a selective restriction criterion is evaluated on the basis of parameters relating to the intercepted access request. A radio signal is sent to jam an acknowledgment signal sent by the network in response to the access request if the selective restriction criterion is satisfied.

Abstract: A Method and Apparatus for Surgical High-speed Follower Jamming Based on Selectable Target Direction is disclosed. The system and method of the present invention automatically detects and jams sudden, short duration communications signals in near real time, in a compass direction selected by the user on the battlefield. Such a system is unique in the number and type of input parameters it uses to allow the operator to tailor its jamming results. The system solves the efficiency, fratricide, and latency issues of prior art systems and greatly enhances the operational capabilities of the modern military unit by allowing the unit to kill all enemy transmitters in any specified sector of the battlefield. The system embodies the addition of real time direction-finding methods to the invention of application Ser. No. 10/912,976.

Abstract: A Method and Apparatus for Automatic Jammer Frequency Control of Surgical Reactive Jammers is disclosed. The system and method to autonomously and selectively jam frequency-hopping signals in near real-time. The system has the ability to automatically detect short duration signals (such as those output from frequency hoppers), to automatically determine if detected signal(s) should be jammed, and subsequently to automatically and extremely quickly activate the jamming transmitter on the frequency-hopper transmitter's frequency. Furthermore, the system improves upon the FFT-based front-end system by incorporating a module that automatically and iteratively comparing the digital FFT results to the analog RF signal to the arrive at a total frequency offset between the FFT results and the analog signal so that the transmitted jamming signal will be more accurately applied on the desired or target frequency.

Abstract: A radio frequency identification (RFID) device detection system includes an RFID device reader configured to detect RFID devices within a predetermined designated area, and two or more jamming signal transmitters configured to prevent the RFID device reader from detecting and reading devices outside of the designated area. The jamming signal transmitters may include a pair of low-frequency field generator loops driven out of phase with one another. RFID devices for use with the detection system may have a pair of antennas, one for detection by the RFID reading system, and another antenna for use in receiving signals from the jamming signal transmitters, in order to prevent communication with a wireless communication device such as an RFID chip, to which the antennas are coupled. The two antennas may be coupled to the RFID chip in parallel, with the antennas each coupled to the same contacts of the RFID chip.

Abstract: A method and system are disclosed for ensuring data availability for a plurality of programmable radios that are waveform agile and that are capable of operating over a plurality of different data links. An enterprise network management tool makes a determination of the threat states for each waveform supported on the programmable radios, and the enterprise network management tool communicates with the programmable radios to advise the programmable radios that a waveform has been compromised. The threat states determined by the enterprise management tool are used to identify which channels are available for dynamic reassignment and which are not. The identity of the available channels and the comprised channels are communicated to a gateway. The gateway establishes a plurality of virtual networks for the programmable radios, and the gateway transitions a programmable radio from one virtual network to another, when service has been denied on the intended delivery path that has been compromised.

Abstract: The present embodiments provide apparatuses and methods for use in receiving radio frequency signals. In some embodiments, a method receives an input signal comprising data and jamming signals, amplifies the input signal according to a first adjustable bias level and producing a first internal signal. The first internal signal is mixed with an intermediate frequency signal to produce a second internal signal. The method detects a level of a signal that is proportional to a level of the input signal prior to baseband limiting filtering and as such is proportional to a level of the data and jamming signals. A bias control signal is generated that is dependent on the detected level of the detected signal, and the first bias level is adjusted according to the bias control signal. The bias control signal can increase as the level of the detected signal increases and can compensate for the jamming signals.

Abstract: A selective blocker for targeted mobile terminals. A signal monitor determines when a targeted mobile terminal is transmitting a signal to a base station. A signal analyzer identifies characteristics of the terminal signal and a processor produces a blocking response based on one or more characteristics. The blocking response is transmitted to the targeted mobile terminal to block communications between the targeted mobile terminal and the base station using the minimum power needed to effectively block the terminal signal so as to limit interference with non-targeted mobile terminals.

Abstract: Method for data transmission in a wireless local area network refers to wireless local area networks (WLAN) consisting of a multitude of transceivers capable of establishing communication with one another (i.e. operating in a peer-to-peer mode). Implies the determination of the quality of communication between all transceivers and storage of communication quality data by each of the transceivers. Based on stored data on communication quality, a transceiver operating in the transmission mode transmits information to an addressee by a transmission route that provides for the quality of communication, which is equal to or better than a specified threshold value of communication quality. Stored data are updated periodically. The method improves the quality and reliability of communication for WLAN users (including mobile users) thus increasing the data transmission rate.

Abstract: A portable information apparatus 20 having communications tools is provided with a switch 22a for instructing enablement/disenablement of transmission functions of the wireless transmission/reception section 21 of the portable information apparatus 20. The portable information apparatus 20, upon receipt of a transmission prohibition signal from an prohibition signal transmitter 31 installed in a public facility 30, determines whether the transmission functions must be disenabled and automatically controls enablement/disenablement of the transmission functions. The portable information apparatus is thus automatically turned off even when the carrier of the apparatus has forgotten to turn off the transmission functions, thereby allowing the carrier to perform necessary operations not involving transmission of electromagnetic waves without causing a nuisance to others.

Abstract: A method and apparatus for circumventing jamming of receivers for a global positioning system (GPS) include determining that a receiver is being jammed by a jamming signal not originating from the GPS. A first signal is transmitted from a portable unit including the receiver to a component of a second positioning system that is different from the GPS. A second signal is received from the second positioning system. The second signal includes data that indicates a position for the portable unit determined in the second positioning system based at least in part on the first signal.

Abstract: A high-directivity transponder system uses a dual system of a retrodirective array transmitting a data signal peak toward an interrogator source, and a self-null-steering array transmitting a null toward the interrogator source and a jamming signal elsewhere, resulting in high S/N reception at the interrogator source and avoidance of interception. Integrating modulators would allow each array to transmit different data while the spectra of the transmitted signals are identical, thus disabling interception. The system enables secure point-to-point communications and can be used for short-distance wireless data transmission systems such as wireless LAN and RFID servers. As another aspect, self-steering signal transmission is employed for randomly oriented satellites using circularly polarized, two-dimensional retrodirective arrays. Quadruple subharmonic mixing is used as an effective means of achieving phase conjugation when a high-frequency LO is not feasible or inapplicable.

Abstract: Techniques are disclosed for providing enhanced privacy in an RFID system comprising a plurality of RFID devices, each having an associated identifier, and at least one reader which communicates with one or more of the devices. A blocker device is operative to receive a communication directed from the reader to one or more of the RFID devices, and to generate, possibly based on information in the received communication, an output transmittable to the reader. The output simulates one or more responses from at least one of the RFID devices in a manner which prevents the reader from determining at least a portion of the identifier of at least one of the RFID devices. The blocker device may itself comprise one of the RFID devices. In an illustrative embodiment, the output generated by the blocker device interferes with the normal operation of a singulation algorithm implemented by the reader.

Abstract: An improved echo control system has an adaptive controlled echo canceling filter arrangement in which a background filter updates the filter coefficients of an echo shaping filter responsive to a normalized least mean square (NLMS) algorithm. An adaptive control module determines a weighted reference signal for the background filter in which the weight is proportional to a far signal reference and an estimate of the norm of an echo canceller error vector, and inversely proportional to en estimate of a residue of the echo canceller. And a non-linear normalized convergence term is used in the NLMS algorithm.

Abstract: A method of detecting a jamming signal (304) in a wireless device (102) includes providing a plurality of channels (401), wherein each of the plurality of channels has an NCO frequency (428, 429), and receiving a channel lock indicator (430, 431) for each of the plurality of channels. A jamming signal is detected if the NCO frequency of each of the plurality of channels differs by an integer multiple of an inverse of a pseudorandom noise code period (424, 425). A wireless device includes a plurality of channels, wherein each of the plurality of channels has an NCO frequency. A frequency tracking loop for each of the plurality of channels outputs a channel lock indicator for each of the plurality of channels. A jamming detection module receives the channel lock indicator and the NCO frequency from each of the plurality of channels.

Abstract: A method and apparatus to compensate for interference between signals within a wireless communication system using dirty paper coding to compensate for interference on the downlink and multi-user detection to compensate for interference on uplink.

Abstract: The Multiple-Antenna Jamming System (MAJS) is useful for missile-borne jamming of active protection system radars that operate in close proximity to the frequency band of the missile's radio frequency seeker. The MAJS utilizes multiple receiving and transmitting antennas to reduce shadowing effects due to the transmissive radome. It also channelizes the jamming signals into in-seeker-band and out-of-seeker band signals to synchronize the transmission of jamming signals with the emit-listen pattern of the missile seeker and to eliminate the problem of de-sensitizing the RF seeker from the jammer energy. The in-seeker-band jamming signals are transmitted only concurrently with the missile seeker emissions and any signals emanating from an enemy radar are received only during the listen mode of the missile seeker.

Abstract: For use in a radiocommunication system using a frequency band close to a frequency band of a different radiocommunication system, a radiocommunication device, or a mobile, is controlled so that a maximum of transmission power is set according to an up-link frequency in use. The closer the up-link frequency in use is to the frequency band of the different radiocommunication system, the lower the maximum of transmission power is set.

Abstract: An inverted-code generator 41 inverts the PN code sequence into an inverted code sequence. The inverted code sequence is transmitted. The inverted code sequence, which is transmitted as a communication breaking wave, is formed into a code sequence in the form if inversion of a pilot signal conforming to CDMA system. Moreover, the phase of the inverted code sequence has been advanced. Therefore, the pilot signal, which is being propagated, can appropriately be compensated with the advanced inverted code sequence. Thus, a fact can be recognized by a portable telephone that the portable telephone is deviated from a communication area for the base station.

Abstract: A method and apparatus for mitigating co-channel and inter-channel interference in an antenna array system. It is determined by a base station or other transmitter employing an antenna array that transmission of at least a first downlink signal will generate a co-channel or inter-channel ghost signal at at least one location that may be susceptible to such ghost signal (e.g., as interference). As such, a weight to be applied to the at least first downlink signal is adjusted to reduce mitigate the undesirable effect of the ghost signal at the location before transmission of the at least first downlink signal.

Abstract: Systems and methods provide for the selective prevention of data transfer from a medical device to allow the patient to have privacy when desired. Theses systems and methods provide medical devices that can be instructed in various ways to stop recording data and/or transmitting data to external devices and systems. These systems and methods also provide external repeater devices that can also be instructed in various ways to stop recording data being received, stop forwarding data that is being or has already been received, and/or to stop soliciting data from the medical device. These systems and methods also provide for a blocking device that may be separate from the medical device and repeater to provide instruction to the medical device and/or repeater to prevent data transfer such as by stopping the recording or transmission of data.

Abstract: An object is to provide an antenna switch semiconductor integrated circuit which reduces a consumption current. To this end, of two control input signals which are fed to a logic circuit which controls turning on and off of a plurality of switching FETs, a control input signal for switching between a sending mode and a receiving mode is fed to an oscillation circuit, thereby making the oscillation circuit operate only during the sending mode under which the logic circuit needs a high voltage. A voltage raising circuit accordingly operates, whereby a raised voltage is supplied to the logic circuit. During the receiving mode, the oscillation circuit stops, and the voltage raising circuit stops. With a switch turned on using the logic circuit, a power source voltage is supplied directly to the logic circuit when the voltage raising circuit is not in operation. This shortens the operation time of the voltage raising circuit and reduces the consumption current.

Abstract: A flexible mobile base station is disclosed comprising a configurable wireless jamming unit, a configurable transceiver, a wireless spectrum analyzing unit, a processing unit and a wireless channels database.

Abstract: Provided is a mobile terminal having an image processing function that can perform independent image processing procedure from call processing and a method therefor. The mobile terminal includes: an image sensor for obtaining an image; an image digital processing (DSP) unit for formatting the image into specific image format data; an interface unit for transmitting the specific image format data to an external unit; and a control unit for generating a control signal allowing the specific image format data to be transmitted to the external unit.

Abstract: The participants of a friendly communication system use so-called time windows in the interference pattern for the communication and transmission among each other. These time windows are preset ahead of time in the communication system by the jamming transmitter or are created and/or adapted individually and short-term with the aid of software programs. Since only the communication-system participants can recognize and/or detect these time windows, they are the only ones that can receive and/or transmit corresponding information during these time windows. The information is compressed in the known manner, such that it can be transmitted and received completely during the brief time window provided. The information can then be decompressed and read during the time of interference in the known manner.

Abstract: The present invention relates to a method of communication through web page and the device for the same. A cellular phone with a built-in modem is provided and there is a personal web page stored in the memory of the cellular phone. When a client end dials the telephone number of the cellular phone, the present invention automatically passes the personal web page to the client end if the modem is set on a responsive status, so that the other side is able to understand about the schedule and situation of the phone's owner. If the phone's owner also gets online in the meantime, he/she can further chats or leaves a message to the client end with each other through the personal web page. Thus it can be known that the present invention is able to flexibly fit the communicative requirements of the phone's owner in different periods. It is so convenient that even deaf-mute people also use it normally.

Abstract: The invention relates to a signal processing method which optimizes the bit error rate under pragmatic conditions. The signalling method is optimally matched to the radio channel, variable with time, in rapid sequence by means of linear operations. Uplink and downplink transmission sides are determined by an excess of antennae on the downplink transmission side. The estimations of the channel matrix in the one transmission direction, necessary for the matching of the transmitter, can, in the absence of common-channel distortions with the condition of channel reciprocity, be directly obtained from the estimations for the other transmission direction. By means of a suitable linear combination of the transmission signals and, optionally, also the received signals, an error-free bi-directional transmission of data streams can be achieved in Rayleigh and Rice channels with significantly lower transmission powers than in purely receiver-side linear signal processing.

Abstract: A projectile guidance system without gyros in which the projectile has an orthogonal body cordinate system. The projectile has a triax of accelerometers providing x, y and z acceleration data measured along the x, y and z axes respectively. A GPS antenna and receiver means provides onboard GPS position and velocity data in earth referenced navigational coordinates. A computer and program means stores and accesses time indexed GPS position and GPS velocity data and transforms x, y and z axis acceleration data from body to navigation coordinates. The program means is responsive to corresponding time indexed acceleration data and to GPS velocity and position data for calculating and outputing an estimated-projectile roll, pitch and yaw angle via optimal smoothing techniques with respect to local level for each time index iteration of present position to a flight control system for guiding the projectile to a predetermined location.

Abstract: A Bluetooth adapter used for infrared interfaces, characterized in comprising: a Bluetooth interface for exchanging data streams with the Bluetooth device via Radio Frequency links; a protocol converting unit for modulating the data streams coming from the Bluetooth device into electronic signals complying with the infrared standards and demodulating the electronic signals sent to the Bluetooth device into data streams; a means for exchanging electronic signals with the infrared device; and a microprocessor for controlling various components of said Bluetooth adapter to enable then to perform their own functions.

Abstract: An electronic device with a concealed firearm. The device includes a housing having an interior face and an exterior face and with a cavity therein. The housing has a plurality of buttons and digital electronics. A tubular wall with a rigid central bore is adapted to function as the barrel of a firearm. The tubular wall has an interior end communicating with the cavity and an exterior end communicating with exterior of the housing. A chamber is provided for receiving a bullet adjacent to the interior end of the bore. A striker element is positioned at the end of the bullet with a point adapted to strike the shell to discharge the bullet and propel the slug thereof outwardly therefrom. An actuator is located on the side of the striker remote from the bullet to initiate movement of the striker element. A mechanism, when activated, is adapted to release the actuator to move the striker element and discharge the bullet.

Abstract: For establishing a local communication connection between a terminal (102) of a cellular radio system and an accessory device (103), a radio channel is identified (301, 302) on which there is no perceivable radio traffic in the cellular radio system, and a communication connection is established (303, 501) between the terminal and the accessory device on the identified radio channel. The radio channel is preferably a code channel of a CDMA system.

Abstract: A method and system for resolving contentions among passive identification tags. A reader may divide a possible range of tag values into a number of smaller ranges. For each smaller range, the reader may then poll the tags to determine which tags have tag values that fall within the smaller range. If more than one tag responds simultaneously, then the reader may further divide the smaller range into even smaller ranges and poll the tags with respect to those even smaller ranges. Once the range partition gets small enough, the reader may then opt to poll the tags for a match of each possible value in the range, rather than partitioning further. This arrangement enables the reader to efficiently identify tags, by quickly eliminating from analysis any range of tag values to which no tags match or only one tag matches.

Abstract: In a wireless communication device (106) a method of detecting a narrowband jamming signal (404) includes receiving a wireless communication signal (104) and downconverting the wireless communication signal (104) to an intermediate frequency (IF) signal (525). IF signal (525) is digitized to provide a digital signal (527). Digital signal (527) is despread, demodulated and monitored for the number of phase transitions (562) occurring during a time interval (556). The method further includes comparing the number of phase transitions (562) during the time interval (556) with a threshold value (560) and determining that the wireless communication signal (104) is not the narrowband jamming signal (404) if the number of phase transitions (562) during the time interval (556) exceeds the threshold value (560), or determining that the wireless communication signal (104) is the narrowband jamming signal (404) if the number of phase transitions (562) during the time interval (556) is less than the threshold value (560).

Abstract: The present invention relates to a double balanced diode mixer in which an output transformer (22) is replaced by an equivalent circuit (50) which approximates the functionality of the output transformer (21). The circuit includes a LCR network (50) which receives a mixed differential input signal from a diode mixer (21) and generates a single ended output signal and further implements a diplexer which terminates the RF input signal.

Abstract: An input signal is mixed with a scrambling code and with an OVSF code, and then accumulated over a period of time equal to one symbol of the pilot channel before being reset. The resultant complex signals are mixed with the conjugate of complex signals provided by a pilot pattern generator, with the result being fed to a delay line (22). A multiplier multiplies the complex value at a location P(n) in the delay line (22) by the conjugate of a complex value at another location P(n+k), and provides the resulting complex number (which is a complex vector whose phase is a coherent measurement of the phase rotation occurring between the symbols corresponding to the two locations) at an output (27). The real part of the complex signal provided at the output (27) is provided to a first combiner (30), and the imaginary part is provided to a second combiner (31). These combiners (30, 31) also receive corresponding signals from all of the other fingers (not shown) of the rake receiver.

Abstract: A method of controlling transmission power in a mobile radiocommunications system, in which at least two distinct physical channels transmitted by a single transmitter have their respective transmission powers controlled by a power control algorithm as a function of a target value for transmission quality (SIR target) correspond to a first channel which is taken as a reference, and in which, for a second channel, a transmission power offset (PO) relative to the first channel is applied, where necessary, the method being essentially characterized in that when there is a change in the required transmission conditions, a variation having a first value (&Dgr;1) is applied to said target value (SIR target), and a variation having a second value (&Dgr;2) is applied to said power offset (PO) so that said first channel has its transmission power changed by said first value and the second channel has its transmission power changed by a value equal to the difference (&Dgr;1-&Dgr;2) between said first and second values.

Abstract: A satellite communication system for providing communications between user terminals and gateways constituted with m primary satellites. In one embodiment, n back up satellites are also provided. Further, each satellite, primary or back-up, is equipped to project N/m beams onto and across an area in a loosely-packed array manner. M of the m primary and n back-up satellites collectively create N beam spots to cover the area. Moreover, each sub-area is covered by a beam spot separated from another sub-area covered by another beam spot by one beam width. Each satellite is also equipped to facilitate communication over 1 of m band of frequencies on one beam. As a result, any of the m primary satellites may be efficiently replaced on demand by a selected one of the n back-up satellites. The gateways and user terminals are configured to communicate signals through or with both or either the primary and back-up satellites.

Abstract: The present invention provides multi-band ultra-wide band (UWB) communication methods and systems capable of adaptively and scalably supporting different applications with different requirements, as well as different desired or ideal properties relating to the communications. A method is provided for transmitting information using multi-band ultra-wide band transmission, including transmitting a signal over each of multiple frequency sub-bands, and allowing variation of at least one transmission parameter to facilitate trade-off between at least two of power consumption, energy collection, bit rate, performance, range, resistance to multiple access interference, and resistance to multipath interference and spectral flatness.

Abstract: A wireless cell phone blocker that would prevent the driver of a motor vehicle from placing or receiving a cell phone call. The invention would be mounted in the vehicle and contain circuitry that would broadcast a short-range signal that would block operation of a cell phone inside the vehicle.

Abstract: A fast recovery diode has a single large area P/N junction surrounded by a termination region. The anode contact in contact with the central active area extends over the inner periphery of an oxide termination ring and an EQR metal ring extends over the outer periphery of the oxide termination ring. Platinum atoms are diffused into the back surface of the device. A three mask process is described. An amorphous silicon layer is added in a four mask process, and a plurality of spaced guard rings are added in a five mask process.

Abstract: A receiving device (10) includes: a receiving section (1) for receiving a real-time signal; a packet analyzing section (2); an error correction section (3) for correcting an error block in a packet; a communication path evaluation section (20); a buffer (4) for storing data; a plurality of antennas (11); an antenna switching section (6); an antenna switching control section (5) for giving instructions to switch between the antennas, in accordance with the result of the evaluation of a communication path performed for each predetermined unit; a retransmission request control section (7) for performing retransmission request, in accordance with the result of the evaluation; a packet assembling section (8) for assembling a retransmission request packet; and a sending section (9) for sending the retransmission request packet. The retransmission request control section (7) performs the retransmission request on condition that the real-time transmission is not interrupted.

Abstract: A distributed electronic warfare system includes a central control site for controlling and receiving data from the system and utilizes a satellite communications system for communications within the system. Electronic warfare pods are attached to variety of aircraft. The electronic warfare pods listen to signals from targets and jam the targets under control of the central control site. The pods supply the data to the central control site. The pods have antennas for radiating jamming signals to the targets and receiving signals from the targets. Transmitters in the pods generate jamming signals and receivers receive the signals from the targets. A signal processor processes the received signals from the targets. The pods may be used for search and collection, geolocation, and electronic attack under control of the central control site.

Abstract: The apparatus makes it possible to neutralize radio telephones, in spaces to be protected, by jamming the call signals or by modifying the communication signals. The variant embodiments of the apparatus are adapted so as to restrict the volume to be filtered and so as to select the filtering communications.

Abstract: A terrestrial communication system using satellite uplink and downlink frequencies is disclosed. A terrestrial cell site produces a signal at a satellite uplink frequency that is transmitted to a terrestrial user terminal. The terrestrial cell site receives a signal at a satellite downlink frequency that was transmitted by a terrestrial user terminal. The terrestrial cell site may include a signal nulling means in the direction of a satellite producing signals at the uplink and downlink frequencies.

Abstract: The present invention relates to a method and device for detecting a communication-interfering jammer in the proximity of a communication equipment normally receiving an intelligible signal. As a first operation, an absence of reception of the intelligible signal by the communication equipment is detected. A discrimination of the detection of a communication-interfering jammer in the proximity of the communication equipment from at least one other cause for the absence of reception of the intelligible signal by the communication equipment is then conducted. A communication-interfering jammer is finally detected in the proximity of the communication equipment when the discrimination indicates that there exists no other cause for the absence of reception of the intelligible signal by the communication equipment.

Abstract: A jamming-resistant method and system transmit security data through a wireless telecommunication network from a first station to a second station remote from the first station. Prior to transmission, common access channels of the wireless telecommunication network are determined. The security data are then transmitted from the first station to the second station through a plurality of the common access channels of the wireless telecommunication network. The security data may be transmitted from the first station to the second station without receiving local access parameters from the wireless telecommunication network at the time of transmission.

Abstract: To reduce change on a cellular network side required at the time of utilizing a cellular network by way of an IP network.

Abstract: A signal processing method, applied in a wireless communications module having a receive path, prevents a nonlinear device in the receive path from using an amplitude modulated transmit or other bleed-over signal in the receive path to modulate a non-amplitude modulated jammer signal on the receive path (or to further modulate an already amplitude modulated jammer signal). The bleed-over signal is conditioned by adding one or more amplitude modulated dummy signal(s) having an envelope that complements an envelope of the bleed-over signal, forcing the nonlinear circuit to operate linearly with respect to the jammer signal. Output of the amplifier may be filtered to remove signals having bandwidths of the dummy signal(s), bleed-over signal, jammer signal, and any intermodulation products generated by introducing the dummy signal(s).