Abstract: A traveling system for mobile bodies includes a control device for controlling traveling operation of a first and a second mobile bodies based on detection information provided by a relative distance detecting device mounted on only one of the first and second mobile bodies for detecting a distance to the other of the first and second mobile bodies, a first distance detecting device for detecting a distance between the first mobile body and a first reference position, and a second distance detecting device for detecting a distance between the second mobile body and a second reference position.

Abstract: The present invention relates to an electronic apparatus and a power supply controlling method with which input power source is switched efficiently in accordance with a load of a device. A power controller 50, upon detecting a USB connection, monitors power consumption of a CPU 44 based on the operation status of the CPU 44, and controls a switch 42 in accordance with a current supplied from a USB cable 2. When the current is less than or equal to 500 mA, the switch 42 is switched to a terminal a. Before configuration, when the current is less than or equal to 100 mA, the switch 42 is switched to the terminal a, and then a regulator 43 is controlled so that the current will not exceed 100 mA. In USB suspend, the switch 42 is switched to a terminal b, and a regulator 53 stops output to a backup battery 54. The present invention can be applied to a digital still camera supporting USB.

Abstract: Embodiments of the present invention relate to a floor display system with variable image orientation. Embodiments may further relate to networked data distribution and management; interactivity; image-enhancing optics; controlled audio; a protective covering; an anti-slip feature; fragrance technology; theft prevention; deployment in a track-and-trench system; specialized positioning mechanisms; and lightweight, flexible implementations.

Abstract: A rolling light emitting diode screen device includes a plurality of equilong rigid supporting stripes, a plurality of pixel units which are disposed with a equal interval in a straight line on the rigid supporting stripes, electric signal lines and power lines connected to respective pixel units, and a control device. It is characterized that it further includes a flexible frame, and the plurality of rigid supporting stripes are aligned at both ends, and are disposed parallel with an equal interval on the flexible frame, so that a pixel matrix plane is formed on the rigid supporting stripes. The flexible frame engages the rigid supporting strips and the pixel units thereon to roll around an axis parallel to the axis of the rigid supporting stripes to form a reel. The rolling LED screen device of the invention is easy to be stored, transported and mounted, wirings thereof are easy to be disposed, not easy to be damaged, and easy to repair.

Abstract: An alarm device comprising an electronic funds transfer at point of sale (EFTPOS) terminal is provided, in which the EFTPOS terminal is adapted to be connected to a telecommunications network and comprises a central processing unit and a program, stored in the central processing unit, adapted to send a pre-defined alarm signal via the telecommunications network. Use of the alarm device as a central alarm station is also disclosed.

Abstract: Provided is an apparatus and method for controlling legacy home appliances based on Zigbee wireless communication. The apparatus includes a home appliances control signal receiving unit for receiving a home appliances control signal from a user; a signal analyzing unit for analyzing the home appliances control signal and identifying a corresponding home appliance; a Zigbee coordinator for transforming the home appliances control signal into a Zigbee signal and transmitting the Zigbee signal to the identified home appliance; a Zigbee signal receiving unit for receiving the Zigbee signal from the Zigbee coordinator; an identification (ID) analyzing unit for analyzing the ID of the transmitted Zigbee signal; a signal transform unit for transforming the Zigbee signal into an infrared rays remote control signal; and an infrared rays signal transmitting unit for transmitting the infrared rays remote control signal to the infrared rays receiving unit.

Abstract: The invention is directed to a wireless location tracking device or tag and auxiliary device for use with a home monitoring unit for tracking individuals or objects. The location tracking device has position determining circuitry and first short range wireless circuitry that communicates position data representative of the location of the tracking device to an auxiliary device (or HMU). The auxiliary device has second short range wireless circuitry that communicates with the tracking device and long range communications circuitry that communicates the position data to a remote location. The tracking device can have a first operational mode, when communication is not established with the auxiliary device, wherein the position determining circuitry is maintained in a normal power state. The tracking device can also have a second operational mode, when communication is established between the tracking device and the auxiliary device, wherein the position determining circuitry is placed in a reduced power state.

Abstract: A mud pulse telemetry system comprises a surface located fluid supply line having a drilling fluid flowing therein. A non-venting pulser is disposed in the drilling fluid in the supply line, and the non-venting pulser is adapted to generate pressure fluctuations in the flowing drilling fluid. A downhole receiver in hydraulic communication with the non-venting pulser is adapted to detect the pressure fluctuations in the drilling fluid. A method for transmitting pressure signals from a surface location to a downhole location in a wellbore, comprises disposing a non-venting pulser in a surface located fluid supply line having a drilling fluid flowing therein. The non-venting pulser is actuated to generate pressure fluctuations in the flowing drilling fluid according to a predetermined encoding scheme. The pressure fluctuations are detected with a downhole receiver in hydraulic communication with the non-venting pulser.

Abstract: A programmable telemetry circuit that may be programmed for high bandwidth, low Q; low bandwidth, high Q; or for other parameters. The programmable telemetry circuit may include a first coil; a high impedance path having a first node connected to a first node of the first coil; a low impedance path having a first node connected to the first node of the first coil; a capacitive path having a first node connected to a second node of the first coil; and an input path for coupling signals into the high impedance path, the low impedance path, and the capacitive path. The low impedance path may be connected in parallel with the high impedance path. The capacitive path may form a circuitous path with the high impedance path and the low impedance path. The programmable circuit may be programmed to select the high impedance path or the low impedance path.

Abstract: A leak detector apparatus and system for use with a plumbing fixture, appliance or other potential water leak source. The leak detector apparatus includes an electrically non-conducting mat that is shaped and dimensioned to rest on the floor. The mat comprises multiple layers of non-conducting closed cell foam and has a plurality of water collector cups formed therein. Spaced-apart sensor wires are provided and form a peripheral sensor that extends between the multiple layers of the mat body and the sensor wires generally extend through the water collector cups. The sensor wires are operative to sense the presence of water in the cups. An electronics module is provided and is associated with the sensor wires and electrically coupled to the sensor wires for triggering an alert in response to the presence of water in one or more of the cups.

Abstract: In a sensor network system for transferring sensing data measured by a sensor node to a host server based upon a process condition, the process condition can be easily set. The host server (4) previously sets a transmission condition which is used to transmit only an event satisfying a preset condition to the host server (4). When the host server (4) receives a joined event from a PAN management server (2), the host server (4) transmits to the PAN management server (2) a transmission condition corresponding to an identifier of an ID of a sensor node (1) of a transmission source of the joined event, and the PAN management server (2) transfers only an observed event satisfying the transmission condition to the host server (4).

Abstract: A method for generating driver assistance information of a traveling vehicle. The method can restructure traveling environments into an image based on a sensor system capable of removing blind spots around a traveling vehicle, and a scheme capable of exactly detecting a lane and a vehicle, and give a collision warning when there is a possibility of collision. Further, the method integrates recognition results of front/rear vehicles based on a lane recognition method applicable to various road environments, including the shape, curvature and loss of a lane, improves the stability of lane recognition, and distinguishes a solid line from a dot line, so it is possible to provide a driver with the subdivided degrees of danger. In addition, when a vehicle deviates from a lane, a voice warning may be output and the position of the vehicle for a road is restructured as an image.

Abstract: A system and method for activating vehicle sensors which are based on inductive loops. A voltage controlled oscillator is scanned throughout the required frequency range while a balanced mixer, low-pass filter, and detector are arranged to show the presence of a signal from an inductive loop by the amplitude of the resultant signal at a difference frequency. The voltage controlled oscillator is then made to dwell at or near the frequency of the sensor loop by adjusting so as to keep the amplitude of that low-frequency difference as high as possible.

Abstract: Method, fob, and system suitable for use in directing a user to the vehicle. The direction being determined as a function of GPS coordinates determined with GPS units on a fob and vehicle. The GPS unit being activated in coordination with each other such that the GPS coordinates associated with the same are commonly inaccurate.

Abstract: There are provided a character entry apparatus and a character entry method using numeric keys, the character entry apparatus including: a number input section having ten numeric keys of 0 to 9 for entry of a number set corresponding to a desired character; a display for displaying the character corresponding to the number set; and a controller for storing a character input table providing an arrangement of a plurality of characters each corresponding to a number set and when a number set is input through the number input section, controlling to display the corresponding character arranged in the character input table and associated with the number set through the display, the number set being formed to include a first number selected from a first number group having a plurality of numbers and a second number selected from a second number group having a plurality of numbers arranged independent of the first number group.

Abstract: An electric capacitance-type touch switch, capable of reducing malfunction in switching operations and improving the degree of freedom in the visual design of switch, includes a detection circuit that can detect an electric capacitance change occurring when a human body approaches or contacts to an electrode. A sputter layer (i.e., a metallic thin film formed by sputtering) is provided on a surface of an upper lens (i.e., insulating base resin layer). The sputter layer can provide a beautiful metallic glossy appearance similar to a mirror surface. The sputter layer can be used as a panel surface providing a glossy appearance with iridescent or dichromatic effects obtainable from the hue of the base resin layer transmitted via the metallic layer. Furthermore, the sputter layer can be used as an electric capacitance detection electrode.

Abstract: A video decoder (10) with reduced power consumption includes a power management controller (45) that is operative to select one of a plurality of different power consumption states for a video decoder (10), and, in response to the determination, vary power consumption of at least one operational portion of the video decoder (10). In addition, in one example, a method (200) for reducing power consumption for a video decoder (10) includes determining input stream encoding description data (34) to select one of a plurality of different power consumption states for a video decoder (10) and, in response to the determination, varying power consumption of at least one operational portion of the video decoder (10).

Abstract: Briefly, in accordance with one embodiment, a method of coding sub-bands by Matching Pursuits (MP) is described.

Abstract: A data encoder. The novel encoder includes a first circuit for generating a fundamental sequence coded data stream from an incoming input data stream, a second circuit for generating a k-split data stream from the incoming data stream, and a third circuit for combining the fundamental sequence coded data stream and k-split data stream to form a final encoded output. The first circuit includes a circuit for converting the incoming input data stream into a novel intermediate format comprising a set bit word and a zero word count, and a zero-word expander for converting the intermediate format to the fundamental sequence coded data stream. The first circuit may also include a register adapted to store the intermediate format to provide rate buffering.

Abstract: Various systems and methods for code based error reduction are disclosed herein. For example, a digital information system including a channel detector and a decoder is disclosed. In the system, the channel detector receives an encoded data set and is operable to perform a column parity check. The channel detector provides an output representing the encoded data set. The decoder receives the output from the channel detector and is operable to perform two checks. The two checks may be one of: two pseudo-random parity checks, a pseudo-random parity check and a slope parity check, and two slope parity checks. In addition, the decoder provides another output representing the encoded data set.

Abstract: A method and apparatus are described for asynchronous sample rate conversion, in particular those which use an interpolating filter, especially a polyphase interpolating filter (FB4). The input and output signals have jitter but the polyphase branch signals have no or reduced jitter due to the operation of a jitter removing means such as a phase locked loop. The jitter is reduced only in the polyphase branch signals. Various methods are described for reducing the jitter.

Abstract: A method (1022) of encoding non-key frame data (1022) is disclosed. The method (1022) includes forming (4010 to 4040) a bitstream from the data by arranging the bits from the data in a known order. The bitstream is interleaved (2020) to form an interleaved bitstream, and parity bits are generated (2030, 2060) for each of the bitstream and the interleaved bitstream. Bits are deleted (2040) from the generated parity bits dependant upon the bitplane of those bits, and an encoded bitstream (1032) is created from the remaining parity bits.

Abstract: A data storage system includes an encoder subsystem comprising an error correction code encoder, a modulation encoder, and a precoder, and a decoder subsystem similarly comprising a detector, an inverse precoder, a channel decoder, and an error correction code decoder. The error correction encoder applies an error correction code to the incoming user bit stream, and the modulation encoder applies so-called modulation or constrained coding to the error correction coded bit stream. The precoder applies so-called preceding to the modulation encoded bit stream. However, this preceding is applied to selected portions of the bit stream only. There can also be a permutation step where the bit sequence is permuted after the modulation encoder before preceding is applied by the precoder. The decoder subsystem operates in the inverse manner.

Abstract: A device configured to parallelize N serial digital input signals includes at least M bit storage devices configured to each respectively store one bit of the N serial digital input signals and provide the one stored bit as a bit of a parallel digital output signal with a bit width M. M is greater than N and N is greater than 1. Symbols with a bit width M are transmitted via the N serial digital input signals such that each of the N serial digital input signals transmits a fraction of the respective symbol. A control device is configured to drive the plurality of bit storage devices cyclically such that at least M bits of the serial digital input signals, which belong to one symbol, are stored in the bit storage devices within a cycle.

Abstract: A signal converter such as a multi-channel pipelined signal converter includes a plurality of pipelined signal converters and a decision unit. Each of the pipelined signal converters has a respective plurality of stage cells coupled in series with switched coupling between the pipelined signal converters. The decision unit determines a respective selected path through the stage cells of the plurality of pipelined signal converters for each of a plurality of input signals during a signal path selection mode.

Abstract: A method of operating an imaging device, an imaging device, a camera system including an imaging device, and a processing system including an imaging device for calibrating an analog-to-digital converter of the imaging device to generate a look-up table of correction values, and correcting an output of the analog-to-digital converter with the correction values.

Abstract: A stage of a pipeline ADC which uses separate pairs of sampling network and amplifier (in a sample and hold circuit (SHA)) to provide inputs to quantizer (which generates a sub-code) and a switched capacitor network (implementing a DAC, a subtractor and amplification). Due to the use of separate components/paths to provide the input signal, the throughput performance of the ADC is enhanced.

Abstract: An analogue to digital conversion unit (208, 210) comprises three analogue to digital converters (ADCs) (300, 301, 302) having different dynamic ranges. A lowest dynamic range ADC (300) and middle dynamic range ADC (301) have saturation detectors SAT for outputting a signal when the amplitude of an input analogue signal reaches their respective dynamic ranges and saturates them. The middle dynamic range ADC (301) and highest dynamic range ADC have enable inputs EN for switching themselves on. The output of the saturation detector SAT of the lowest dynamic range ADC (300) is connected to the enable input EN of the middle dynamic range ADC (301). The output of the saturation detector SAT of the middle dynamic range ADC (301) is connected to the enable input EN of the highest dynamic range ADC (302).

Abstract: In one implementation, a termination circuit may include a variable resistance circuit that comprises a resistance network in which the resistance of a parallel combination of two complementary transistors of opposite types is substantially independent of the drain-to-source voltages of the transistors when the gate-to-source voltages of the transistors are substantially equal in magnitude and opposite in sign. In various examples, the network may include a resistor in parallel and/or series with the transistors. Some implementations may adjust a resistance of the network in response to a digital-to-analog converter output signal. In another implementation, an integrated circuit may include a termination stage with an integrated resistor in parallel or series with a circuit having a tunable impedance. In an illustrative embodiment, relative channel width of the first and second transistors may be selected to realize substantially complementary characteristics for drain-to-source voltage vs.

Abstract: A sigma-delta circuit with time sharing architecture includes a coefficient generation element, a sigma-delta processing element, and a storage element. The coefficient generation element is used for generating coefficients for sigma-delta operations. The sigma-delta processing element is used for executing sigma-delta operations according to the coefficients generated by the coefficient generation element. The storage element is used for storing results of the sigma-delta operations executed by the sigma-delta processing element. The sigma-delta circuit is used for executing a plurality of orders of sigma-delta operations through the coefficient generation element, the sigma-delta processing element and the storage element.

Abstract: A method is provided for multi-channel analog-to-digital conversion. The method includes: receiving an input vector which represents a plurality of analog signals; transforming the input vector using a linear transformation matrix; converting the transformed input vector to a digital stream using an array of sigma-delta converter; and adapting the linear transform matrix to maximize de-correlation between the signals represented in the input vector.

Abstract: An n bit D/A decoder is formed using P-type and N-type transistor switches, instead of convention CMOS switches. Each P-type and N-type switch may be formed of fewer transistors than those used to form a CMOS switch, thereby reducing the overall transistor count. The decoder may be used to decode digital values to non-linear GAMMA corrected analog output voltages.

Abstract: System and method for high-speed and high-precision digital to analog conversion. A preferred embodiment comprises a dual-resistor ladder digital-to-analog converter with a coarse resistor ladder and a fine resistor ladder, wherein resistors in the fine resistor ladder are implemented using transistors. When the effective resistances of switches used in a switching circuit are properly matched with the resistance of the resistors, the differential non-linearity and the integral non-linearity of the digital-to-analog converter can be minimized. The use of transistors to implement switches and resistors can help to eliminate mismatches arising from different fabrication steps and materials, further improving the performance of the digital-to-analog converter.

Abstract: A converter comprises an input terminal to receive a first analog signal, a digital-to-analog converter to provide second analog signals related to digital values applied to the digital-to-analog converter. A comparator is coupled to receive the first and second analog signals, the comparator also comprising a variable-gain amplifier to provide an output signal based on a difference between the first and second analog signals. A state machine receives the output signal of the comparator and to generate the digital values applied to the digital-to-analog converter based on the output signal of the comparator and a controller sets the gain of the variable-gain amplifier selectively.

Abstract: An overdrive digital-to-analog converter (DAC), a source driver, and a method thereof are provided. The DAC comprises a voltage divider unit, a selection unit, a buffer unit, and a detection unit. The voltage divider unit provides a plurality of reference voltages. The detection unit outputs a regulation signal according to a comparison result between a specific reference signal corresponding to an input digital signal and an output voltage output from the buffer unit. The selection unit regulates an overdrive voltage input to the buffer unit according to the regulation signal and the input digital signal. Accordingly, the output voltage of the buffer unit is changed quickly, and the conversion speed of the DAC is improved.

Abstract: A calibrator circuit and method for VCOM voltage adjustment for an LCD includes using integrated programmable resistive arrays. The method uses two DACs and three integrated circuit arrays to provide all of the advantages of VCOM calibrator circuits using external resistive voltage-dividers. The integrated circuit resistor arrays reduce the number of external components and PCB space. The method used is suitable for higher resolution adjustment of the VCOM voltage and no calculation is required in the whole adjustment procedure, which saves labor cost, time and enables automation of the calibrator fabrication.

Abstract: Provided is a digital modulation circuit constructed with only a digital circuit. The digital modulation circuit includes: a clock generator which generates a reference clock pulse having a predetermined period; an up/down counter which generates a count value having predetermined bits by up-counting or down-counting the reference clock pulse and outputs a bit in the count value as a transmission signal; a controller which determines a counting start/end time point of the up/down counter and determine which one of the up-counting operation and the down-counting operation of the up/down counter is to be performed, according to a value of digital transmission data that is to be transmitted; and a band-pass filter which converts a waveform of the transmission signal output from the up/down counter into a sine waveform.

Abstract: A DAC having a memory mat including a plurality of first memory cells, and a plurality of output lines connected to the plurality of first memory cells. Each of the plurality of memory cells has a first memory portion including bipolar transistors and storing information in non-volatility based on whether a junction of the bipolar transistors is destroyed or not, and a second memory portion connected to the first memory portion and for outputting information to corresponding one of the plurality of output lines. The DAC has a first mode in which information is transferred from the first memory portions to the second memory portions when the information is written into the second memory portions, and a second mode in which the second memory portions are specified externally and information is written into the second memory portions. Thus, the performance of a D/A converter can be improved.

Abstract: An electronic circuit includes a digital-to-analog converter (DAC), and an active integrator. The DAC converts a digital output of the electronic circuit to an analog signal and feeds back the analog signal. The active integrator includes an operational amplifier having a first input terminal that receives a summed signal of an input signal and the fed back analog signal, and a second input terminal that receives a reference voltage. The DAC includes a coupling capacitor, first switches, at least one current source, second switches, and a third switch.

Abstract: An electronic filter device for the reception of TV-signals, comprising a plurality of frequency determining elements settable by means of an analog setting voltage, a memory (2) for storing digital values representative of the analog setting voltages and conversion circuitry (11-14) for converting the digital values into the analog setting voltages. The conversion circuitry comprises a first part (11-13) for generating a digitally modulated signal for each digital value, the digitally modulated signal having a modulated characteristic representative of the digital value, and a second part (14) for converting each of the digitally modulated signals into the analog setting voltages.

Abstract: For signal processing such as in an image sensor, a CDS (correlated double sampling) unit generates a first CDS signal from a first set of input signals at a predetermined node. In addition, a conversion unit converts a second CDS signal into a respective converted signal concurrently as the CDS unit generates the fist CDS signal. The second CDS signal is determined from a second set of input signals previously generated at the predetermined node.

Abstract: A detector for detecting information carried by a signal having a sawtooth-like shape. The detector includes a first band-pass filter with center frequency around a first frequency value for filtering the signal and generating a first filtered signal, a second band-pass filter with center frequency around a second frequency value for filtering the signal and generating a second filtered signal, a first comparator for comparing the first filtered signal with a reference level and generating a first compared signal, a second comparator for comparing the second filtered signal with the reference level and generating a second compared signal, a clock generator for generating a reference clock having a frequency close to the first frequency value according to the second compared signal, and a detection module for generating a bit signal representing the information according to the first compared signal and the reference clock.

Abstract: A quantization circuit includes a plurality of resistors, a plurality of tap points, and a plurality of coarse comparators. Each coarse comparator has a first input coupled to an input voltage and a second input coupled to a corresponding coarse tap point voltage. Each coarse comparator operates during a first phase to produce a “1” only if the input voltage exceeds the corresponding coarse tap point voltage. A plurality of fine comparators each have a first input coupled to the input voltage, and each fine comparator operates during a second phase to produce a fine output level indicative of whether the input voltage exceeds a corresponding tap point voltage of a group of tap points located immediately below the tap point connected to the highest coarse comparator producing a “1”.

Abstract: A remote controller with memory capability includes a status button, a memory, a processing unit, and a transceiver device. The memory is utilized for storing a status information of an electronic product. When the status button is pressed, the processing unit generates a control signal and determines whether the status information exists in the memory. When the status button is pressed and the status information does not exist in the memory, the transceiver device outputs the control signal and receives the status information and the memory stores the status information. When the status button is pressed and the status information exists in the memory, the transceiver device outputs the control signal and the status information stored in the memory.

Abstract: There is described a device for controlling a primary remote control, the apparatus comprising: a receiver adapted to receive a control signal for remotely operating an apparatus from a secondary remote control; and control circuitry coupled to the receiver, configured to be operatively connected to the primary remote control and adapted to communicate the control signal to the primary remote control, thereby activating the primary remote control for operation of the apparatus.

Abstract: According to one embodiment, an electronic device includes a controller which performs communications with a module, executes procedures for initializing the module in response to input of an insertion signal, and stops the communications with the module in response to input of an extraction signal, a power supply which applies a drive voltage to the module in response to input of a power-on command and stops applying the drive voltage to the module in response to input of a power-off command, command supplying section which supplies power-on command to the power supply when the user selects an “on” item and supplies the power-off command to the power supply when the user selects an “off” item, and signal supplying section which supplies the insertion signal to the controller when the user selects the “on” item supplies the extraction signal to the controller when the user selects the “off” item.

Abstract: A collision alerting and avoidance system is presented herein. The system comprises at least one antenna array disposed on a structure on the ground and at least one transmitter/receiver probe coupled to the antenna array. The transmitter/receiver probe operates in a transmit mode to transmit electromagnetic waves and in a receive mode to receive an echo signal reflected from an obstacle in the area of an aerial vehicle. The system also comprises at least one transmitter/receiver module coupled to the transmitter/receiver probe. The transmitter/receiver module operates in a transmit mode to produce electromagnetic waves for transmission and in a receive mode to receive the echo signal. The system also comprises a processor coupled to the transmitter/receiver module. The processor controls transmission of the electromagnetic waves from the antenna array and processes the echo signal to provide an output signal containing information regarding the obstacle.

Abstract: A method and system are provided for detecting an edge of a received signal associated with air traffic control communications. The system includes an A/D converter to convert a received signal to a series of digital data samples and an edge detector module to determine a change rate between the data samples. The change rate represents a change in amplitude between the data samples per unit of time. The edge detector module validates an edge of the received signal based on the change rate between the data samples. A decoder module may derive timing information from the leading/trailing edge pulses and associates the reply message with the framing pulse based on the timing information.

Abstract: According to one embodiment, a method for use in managing satellite communication signal strength includes: receiving a beacon signal from an earth-based beacon, the received beacon signal having an amplitude; monitoring the amplitude of the beacon signal; and, in response to monitoring the beacon signal, causing a transmitter to adjust the signal strength for a satellite communication. According to another embodiment, a method for use in managing satellite communication signal strength includes: using a transmitter on a satellite, transmitting microwave communications signals; determining a distortion associated with at least a portion of the transmitted microwave communications signals; and, in response to the determination, causing the signal strength of the microwave communications signals transmitted by the transmitter to be adjusted.

Abstract: According to one embodiment, a method for use in managing satellite communications includes: receiving, at a first earth-based gateway antenna system, one or more microwave communication signals from a substantially geostationary satellite; monitoring for a performance change in at least one signal from the satellite; and, in response to detecting a performance change in the at least one signal, transmitting instructions to the satellite to transmit at least a portion of the one or more microwave communication signals to a second earth-based gateway antenna system.