Abstract: A transceiver suitable for larger scale of integration employs direct conversion reception for reducing the number of filters. Also, the number of VCOs is reduced by utilizing dividers to supply a receiver and a transmitter with locally oscillated signals at an RF band. Dividers each having a fixed division ratio are used for generating locally oscillated signals for the receiver, while a divider having a switchable division ratio are used for generating the locally oscillated signal for the transmitter. In addition, a variable gain amplifier for baseband signal is provided with a DC offset voltage detector and a DC offset canceling circuit for supporting high speed data communications to accomplish fast cancellation of a DC offset by eliminating intervention of a filter within a feedback loop for offset cancellation.

Abstract: In an exemplary embodiment, a circuit is disclosed comprising a plurality of inputs, each input to receive a radio frequency waveform from a plurality of differential input waveforms having different phases; and an inverter circuit to invert a waveform from the plurality of differential inputs waveforms to a substantially same phase as a non-inverted input waveform. The circuit further comprises a combiner node to combine the inverted and the non-inverted input waveforms into an output waveform.

Abstract: A signal processing device and signal processing method is provided that includes a detection unit for detecting a signal strength of a signal, whereby the detection unit is configured to output a detection value that represents the signal strength of the signal; a settable digital filter connected upstream of the detection unit, whereby filter coefficients for setting a transfer characteristic of the filter are assigned to an amplification or attenuation of the signal by the filter; a digital multiplication unit, which is connected upstream of the detection unit for amplification or attenuation of the signal, whereby the multiplication unit is configured to compensate partially for the amplification or attenuation of the filter, whereby the compensation is encumbered with a residual error; and a correction unit to apply to the detection value a correction value at least partially compensating for the residual error.

Abstract: Disclosed herein is an information processing apparatus including: judging means for judging whether a receiving device for receiving a signal amplified by an amplifying circuit which amplifies a supplied signal has a good reception state or not; and control means for changing a power supply voltage of said amplifying circuit to change a gain of the amplifying circuit if said judging means judges that said receiving device does not have a good reception state.

Abstract: There is provided a receiver with a sigma-delta structure, the receiver including: a low noise amplifier amplifying a received signal according to a detection signal; a mixer converting an RF signal of the low noise amplifier into an IF signal; a sigma-delta A/D converter converting the IF signal from the mixer 200 into a digital signal; a 1 bit detector determining whether a voltage of the output signal of the mixer is greater than that of a predetermined reference voltage and outputting the detection signal including a result of the determination; and a demodulator obtaining an FFT result with respect to the signal from the sigma-delta A/D converter and adding or subtracting a predetermined gain value to or from the FFT result to calculate received signal strength indication (RSSI).

Abstract: A receiving device includes a mixer, an AC coupling circuit, a post-stage circuit, and a DC offset calibration circuit. The mixer is utilized for mixing an input signal with a local oscillating (LO) signal from an oscillator to generate a converted signal. The AC coupling circuit is coupled to the mixer and utilized for reducing at least one portion of DC offset of the converted signal to generate a filtered signal. The post-stage circuit is coupled to the AC coupling circuit and utilized for processing the filtered signal to generate an output signal. The DC offset calibration circuit is coupled to the post-stage circuit and utilized for providing at least a compensation current for the post-stage circuit to reduce DC offset of the output signal.

Abstract: According to one embodiment, a wireless communication apparatus includes a filter module, a generator, a first comparator and a power management module. The filter module is configured to transmit an uplink channel component among a received signal by an antenna. The generator is configured to generate an input voltage by using the uplink channel component. The first comparator is configured to output a first high signal when the input voltage is higher than a first threshold voltage, and output a first low signal when the input voltage is not higher than the first threshold voltage. The power supply management module is configured to change a power supply for transmission and reception of a wireless signal from an off state to an on state when the first high signal is continuously output for a minimum transmission time of an uplink signal or more.

Abstract: Systems and methods for sharing an AGC loop between a wireless data demodulator and a spectrum analysis module that operates simultaneously with the data demodulator. In one embodiment, a predetermined hold time prevents the AGC loop from changing gain too often, thereby allowing the spectrum analysis module to collect reliable data. In another embodiment, the hold time may be extended to coincide with a spectrum analysis event, such as a boundary of an FFT block. In still another embodiment, an FFT valid signal is provided such that collected FFT blocks can be designated as suspect and then subsequently processed accordingly.

Abstract: A mobile tracking device is provided that monitors or measures one or more signals from GPS satellites and remote wireless base stations during a GPS acquisition process and a registration process, and terminates the process(es) prior to reaching a default timeout when the signals do not meet a predetermined threshold or value. Instead of continuing the acquisition and/or registration process for the full timeout period when the received signals (if any) indicate there is a low probability of successfully completing the particular process, the tracking device early terminates the process(es). This saves or reduces power by preventing the continued operation of the particular process when it is likely to be unsuccessful.

Abstract: An apparatus comprising a plurality of switchable full step mixer unit cells, wherein each switchable full step unit cell is configured to, when the full step transceiver mixer unit cell is turned on, increase the gain experienced by an electronic signal by a full step increment, and wherein the step increment is substantially constant regardless of temperature; and at least one switchable partial step mixer unit cell configured to, when the partial step transceiver mixer unit is turned on, increase the gain experienced by the electronic signal by a predetermined step increment less than that of a full step, and wherein the partial step increment is substantially constant regardless of temperature.

Abstract: A receiving apparatus includes an amplification section that amplifies a received signal and a frequency conversion section that converts a frequency of the received signal, from a radio frequency to a baseband, the baseband having a lower frequency than the radio frequency. A gain control section amplifies, by a predetermined gain, the signal that has been subjected to the frequency conversion to the baseband. A voltage calibration section performs calibration on an offset voltage generated in the signal subjected to frequency conversion to the baseband. A time constant control section sets a first time constant during a reception operation and sets a second time constant, which is reduced with respect to the first time constant, during the calibration.

Abstract: A communication apparatus and a low noise amplifying method. The communication apparatus includes a gain adjusting unit to adjust a gain of an input signal; a combiner to generate an output signal using the signal gain-adjusted at the gain adjusting unit; and a feedback unit which provides a feedback signal, which is generated using the output signal generated at the combiner, to an input stage. Accordingly, various frequency bands defined in the wireless standards can be supported. Since the load impedance is generated without resistance, the manufacturing cost and the product size can be reduced.

Abstract: A method of fast predictive automatic gain control is disclosed including estimating channel gain applied to a received signal, predicting channel gain at a subsequent time by applying temporal correlation statistics to the estimated channel gain, determining a predicted receiver gain which reduces variance between the predicted channel gain and a predetermined target power level, and applying the predicted receiver gain to the received signal. The method may include applying linear minimum mean-squared error prediction to the estimated channel gain. The method may include predicting error variance at the subsequent time by applying the temporal correlation statistics to the estimated channel gain and combining the predicted channel gain and the predicted error variance.

Abstract: An audio device includes a jack, a switch, an amplifier, an internal sound producer, and a determining circuit. The jack establishes a connection with an external sound producer. The switch is in an opened state when the connection is established, and in a closed state when the connection is open. The amplifier amplifies audio signals to amplified audio signals and sends the amplified audio signals to the switch. The determining circuit receives the amplified audio signals from the switch, and generates a high voltage to control the amplifier not to output the amplified audio signals to the internal sound producer when the switch is in the closed state, and generates a low voltage to control the amplifier to output the amplified audio signals to the internal sound producer. The determined circuit further filters out the amplified audio signals when the switch is in the opened state.

Abstract: RFID interrogator device carries out an automatic gain control when an RF signal from RFID tag with a backscatter radio-communication is received. To carry out the automatic gain control, amplitude of the reception signal is measured within a prescribed time corresponding to a length of preamble added to the head of data of the RF signal. An AGC value is determined based on the measured amplitude value.

Abstract: A system and method for minimizing phase jumps in an output signal.

Abstract: Techniques for optimizing gain or noise figure of an RF receiver are disclosed. In an exemplary embodiment a controller controls a capacitor bank between an LNA and a mixer of the RF front end of the receiver. For a given center frequency a first set of capacitors is switched to the mixer and a second set of capacitors is switched to ground. The ratio of capacitance of the second set to the first set of capacitors affects either gain of the RF FE or noise figure of the receiver. Therefore, the RF FE of the receiver may be controlled in such a way as to optimize for either RF FE gain or for receiver noise figure.

Abstract: A circuit includes, an attenuator responsive to an input signal and a feedback signal, a variable gain low-noise amplifier responsive to the attenuator and to the feedback signal, a tracking filter, a frequency converter, and an RSSI responsive to the variable gain amplifier to generate an output signal to which the feedback signal is responsive. The frequency converter may be a mixer having a single-ended input and a differential output. The circuit may further include an analog baseband block responsive to the mixer to filter out high frequency signals. The tracking tuner performs bandpass filtering operation on the output signals of the variable gain low-noise amplifier.

Abstract: An integrated circuit radio transceiver and method therefor includes a high-pass variable gain amplifier (HPVGA) operably disposed within one of the transmitter and the receiver front ends operable to provide a linear variable gain and a substantially constant high-pass frequency corner that does not vary with changes in gain level settings. The HPVGA includes an amplifier operably disposed to receive an input signal and to produce an amplified output based upon the input signal, an adjustable resistance block operable to adjust resistance based upon a gain control input and corner drift compensation block operably disposed to provide corner frequency compensation at the input terminal of the amplifier that is further coupled to receive the input signal from the adjustable resistance block.

Abstract: A received signal strength indicator according to an aspect of the invention may include a gain calibration section including a calibration limiter, a calibration load unit and a comparison and adjustment unit. The calibration load unit is connected to output terminals of the calibration limiter, and generating an output differential voltage whose gain is a unit gain when a predetermined input differential voltage is input to the calibration limiter, and a comparison and adjustment unit comparing the input differential voltage with the output differential voltage, and adjusting an output of a variable current source included in the calibration limiter so that the input differential voltage becomes identical to the output differential voltage.

Abstract: When information of its own station is transmitted to another mobile station by a CSMA access method, by a transmission control method and device, moving speed information and location information is transmitted with a predetermined minimum transmission power until a moving speed of its own station exceeds a first threshold, and the moving speed information and the location information is transmitted with a first transmission power proportional to the moving speed when the moving speed of its own station exceeds the first threshold. In this case, moving direction information of its own station may be acquired and transmitted in addition to the moving speed information and the location information.

Abstract: A method and system for adapting low noise amplifier gain comprise determining a Bluetooth received signal strength indication of Bluetooth signals transmitted by a Bluetooth peer; determining a WLAN received signal strength indication of WLAN signals transmitted by a WLAN peer; comparing the Bluetooth received signal strength indication to a predetermined Bluetooth signal strength threshold to determine a Bluetooth peer distance of the Bluetooth peer; comparing the WLAN received signal strength indication to a predetermined WLAN signal strength threshold to determine a WLAN peer distance of the WLAN peer; and controlling a gain of a low noise amplifier to be applied to the Bluetooth signals and the WLAN signals based on the Bluetooth peer distance and the WLAN peer distance.

Abstract: The invention provides a signal amplifying stage, used in a signal receiver. The signal amplifying stage has: a fixed-gain low noise amplifier (LNA), amplifying an input signal; a variable-gain LNA (VG-LNA) array, amplifying the input signal, including a plurality of parallel VG-LNAs, the VG-LNA array being parallel with the fixed-gain LNA; a variable-gain amplifier (VGA), being in series with the fixed-gain LNA and the VG-LNA array, for amplifying output signals from the fixed-gain LNA and the VG-LNA array to generate an output signal; an attenuator, being in parallel with a combination of the fixed-gain LNA, the VG-LNA array and the VGA, for attenuating the input signal to generate the output signal; and a control loop, coupled to the VGA and the attenuator, for detecting power levels of the output signal to enable and control the fixed-gain LNA, the VG-LNA array, the VGA and the attenuator.

Abstract: Methods and apparatus to perform radio frequency (RF) analog-to-digital conversion are described. According to one example, a receiver includes an amplifier to amplify received analog RF signals and a mixer-free circuit for converting the received analog RF signals to digital signals.

Abstract: An OFDM receiver includes: a variable gain amplifier controlling a signal level of an intermediate frequency signal that is obtained from a reception signal by frequency-conversion; and an automatic gain controller controlling a gain of the variable gain amplifier means. The automatic gain controller includes: a clip detector comparing a clip number threshold value with a detected number of transient clips in which a signal level of the intermediate frequency signal exceeds a parameter clip level, so as to detect a period where the detected number exceeds the clip number threshold value; an accumulator accumulating a detection output of the clip detector; and a target value decision circuit to which an accumulation output of the accumulator is supplied.

Abstract: Methods and apparatus to implement receiver linearity enhancement are described. One example method includes controlling receiver gain by determining a level of a received signal that is to be provided to a radio frequency component; determining if the level of the received signal would cause the radio frequency components internally generated noise to increase; and when the level of the received signal would cause the radio frequency components internally generated noise to increase, reducing the level of the received signal prior to providing the received signal to the radio frequency component.

Abstract: A digital broadcasting receiving apparatus has a signal level detecting circuit; a peak detecting section; an abnormal peak deciding section; a specified peak deciding section; a prescribed in-band power deciding section; and makes a decision as to whether a signal being received is a digital broadcasting signal or not according to decision results output form the signal level detecting circuit, the abnormal peak deciding section, the specified peak deciding section and the prescribed in-band power deciding section.

Abstract: A wireless communication system includes: a filter; and a semiconductor chip including a signal processing integrated circuit having an amplifier, wherein a main surface of the semiconductor chip is provided with a plurality of electrode terminals along an edge portion thereof; wherein the amplifier has a transistor including a control electrode, a first electrode through which a signal is outputted, and a second electrode to which a voltage is applied; wherein the control electrode, the first electrode and the second electrode of the transistor are connected to the electrode terminals, respectively; and wherein none of wirings are arranged between the electrode terminals and placements of the control electrode, the first electrode and the second electrode, making space between the electrodes and the electrode terminals narrow.

Abstract: An AGC circuit includes a low noise RF amplifying module with an adjustable gain, a frequency converter, an IF/Baseband amplifying module with an adjustable gain, an A/D converter, an AGC module and a gain distribution module. The AGC module is configured for detecting a level of a digital IF/Baseband signal outputted from the A/D converter, comparing the detected level with a reference level and generating a digital AGC signal and a digital gain distribution control signal based upon the comparison result. The gain distribution module is subject to control of the digital AGC signal and digital gain distribution control signal and configured for generating digital gain control signals to selectively adjust at least one of the gains of the low noise RF amplifying module and the IF/Baseband amplifying module in a digital manner to keep an IF/Baseband signal outputted from the IF/Baseband amplifying module at a desired level.

Abstract: A low noise amplifier in an integrated circuit, the circuit having a digital portion and an analog portion on a common substrate, the digital portion having at least one clocking frequency, includes an input configured to receive a signal at a tuned frequency and an output circuit. The output circuit is configurable to operate in either a single-ended mode or a pseudo differential-ended mode, wherein the output circuit is configured in the pseudo differential-ended mode when the tuned frequency is substantially similar to the at least one clocking frequency or one of its harmonics and otherwise configured in the single-ended mode.

Abstract: A digital broadcasting receiver includes: a variable gain amplifier for amplifying an electric wave received through an antenna, a gain of the variable gain amplifier being made variable in accordance with a signal from the outside; a distributor for distributing the signal from the variable gain amplifier into two signals; first and second tuners connected to the distributor for performing selection of broadcastings, and amplification; digital demodulation ICs for demodulating output signals from the first and second tuners, thereby obtaining digital signals, respectively; and a signal processing portion for processing the digital signals from the digital demodulation ICs. The signal processing portion calculates bit error rates of the first and second tuners, and when at least one of the bit error rates is equal to or larger than a threshold, varies the gain of the variable gain amplifier.

Abstract: A direct conversion receiver (200) includes a low noise amplifier (LNA) (213), at least one baseband amplifier (119, 123 and 127), register banks (250 and 251) for storing a plurality of offset data corresponding to at least two LNA gain settings and a plurality of baseband gain settings, a DC offset correction system (235) for providing a DC offset signal, a state machine (275) for sequencing through each of the plurality of baseband gain settings and through enable and disable states for the LNA, and a processor (290) programmed to activate the state machine and to run the DC offset correction system.

Abstract: Aspects of a method and system for LNA adjustment to compensate for dynamic impedance matching are provided. In this regard, an antenna matching network may be configured to maximize received signal strength for a determined frequency and an amplifier gain may be adjusted based on the maximized signal strength such that output levels of the amplifier are between specified limits. The antenna matching network may be programmatically controlled via one or more switching elements. The amplifier gain may be programmatically controlled via one or more bias points. The antenna matching network may be configured for a plurality of frequencies in a frequency band, such as an FM broadcast band, and a configuration for each frequency may be stored. Accordingly, when the receiver is tuned to a frequency, a corresponding configuration may be retrieved from memory.

Abstract: A method, algorithm, circuits, and/or systems for demodulation in an amplitude modulated (AM) radio receiver are disclosed. In one embodiment, a radio receiver can include an amplifier configured to receive a radio frequency (RF) input signal and a gain control signal, and provide an amplified signal, an automatic gain control (AGC) circuit configured to receive a high threshold comparator output and provide the gain control signal, a mixer configured to combine the amplified signal and a local oscillation signal and provide a mixed output, a high threshold comparator configured to compare the mixed output with a reference level and provide the high threshold comparator output, and a low threshold comparator configured to compare the mixed output with the reference level and provide an output of the radio receiver.

Abstract: System and method for elimination of close-in interferers through feedback. A preferred embodiment comprises an interferer predictor (for example, interferer predictor 840) coupled to a digital output of a direct RF radio receiver (for example, radio receiver 800). The interferer predictor predicts the presence of interferers and feeds the information back to a sampling unit (for example, sampling unit 805) through a feedback circuit (for example, feedback unit 845) through the use of charge sharing. The interferers are then eliminated in the sampling unit. Additionally, the number and placement of zeroes in a filter in the sampling unit is increased and changed through the implementation of arbitrary-coefficient finite impulse response filters.

Abstract: The present invention provides a receiver having low power consumption and method thereof. The receiver with low power consumption adjusts the gain based on the automatic gain control information. The receiver acquires the signal peaks both after and before a channel selection filter and further analyzes the wanted signal and interference signal with respect to the signal peaks. The receiver determines the magnitude of the wanted signal and determines whether the interference signal exists. The receiver provides the signals with optimal current correspondingly in order to effectively decrease the power consumption of the receiver.

Abstract: A method for controlling alignment of a control loop in an amplifier system includes generating a pilot signal and injecting the pilot signal into the amplifier system. Any uncanceled pilot signal is detected at an output of the control loop. A frequency of the generated pilot signal is detected and is used in adjusting one or more parameters of the control loop. The adjusting is performed at a predetermined direction and with a predetermined step size. A frequency change in the pilot signal in response to the adjusting is detected. The control loop is iteratively aligned by controlling the adjusting based on the detected frequency change, and the step size is determined based on the detected frequency change.

Abstract: In a method for synchronizing a receiver to a synchronous signal, in a signal having been processed based on an automatic gain control (AGC) with a varying gain, a symbol is detected. An estimated beginning of a subsequent frame is determined based on the detected symbol. A gain of the AGC is fixed for a period during which the estimated start of the subsequent frame is processed by the AGC. A transform of the signal is analyzed to determine if the estimated start of the subsequent frame corresponds to an actual start of the subsequent frame. If the estimated start of the subsequent frame does not corresponds to the actual start of the subsequent frame, the gain of the AGC is allowed to resume varying and, a further symbol in the signal is detected, the signal having been processed based on the varying gain of the AGC.

Abstract: A wireless receiver with automatic gain control and a method for automatic gain control of a receiving circuit utilized in a wireless receiver are provided. The receiving circuit includes a programmable gain amplifier and a low noise amplifier, and the method includes: comparing a gain code of the programmable gain amplifier with a predetermined code range, wherein the gain code is determined by a frequency signal received through the low noise amplifier; and adjusting a gain of the low noise amplifier when the gain code is out of the predetermined code range.

Abstract: A receiver arrangement with AC coupling is specified in which a filter arrangement (3) is provided in a baseband signal processing chain in a homodyne receiver and can be switched between at least two high-pass filter cut-off frequencies. In this case, a brief changeover is made to a higher cut-off frequency when varying the gain of a low-noise baseband amplifier (2), for example when the received field strength changes, during the reception mode. The described arrangement allows changes to be carried out to the gain in baseband during the normal reception mode. The present receiver is accordingly suitable for code division multiple access methods, such as those which are provided in the UMTS Standard.

Abstract: Disclosed herein is an amplifier circuit formed by multiple transistor stages and having an input terminal for a signal and an inverted output terminal configured to output an inverted signal after amplification, wherein a feedback resistance and a feedback capacitor for input impedance matching are connected in series with each other between the inverted output terminal and the input terminal.

Abstract: A fixed point finite impulse response (FIR) filter comprising: 1) an input stage for receiving an input signal as a sequence of input samples comprising: i) delay elements connected in series for receiving and shifting N sequential input samples; ii) multipliers, each multiplier receiving a selected one of the N sequential input samples from the delay elements and multiplying the selected input sample by a corresponding coefficient to produce an intermediate product; and iii) a summer for receiving and adding N intermediate products from the multipliers to produce an output sum signal comprising a sequence of output sum samples; and 2) an output stage for truncating k least significant bits (LSBs) from each of the output sum samples, wherein k is a variable number.

Abstract: A system and method is provided for reducing signal distortion and saturation within an RF receiver which may be operated in an environment under the presence of interfering signals such as in a WiMAX environment. In an embodiment, a first gain stage and a second gain stage are selectively lowered to predetermined lower levels, assuring that if there is a blocker present, it would not cause signal distortion and saturation in the receiver. The loss of the gain in the first gain stage and second gain stage is compensated by a third gain stage which selectively amplifies the signals of interest. If a blocker is not detected, the maximum allowable gain of the first gain stage and the second gain stage is set to a predetermined upper limit allowing for maximum receiver sensitivity. Accordingly, with this system and method a direct conversional receiver can operate in the presence of interfering signals without signal distortion and saturation.

Abstract: The signal strength of an out-of-channel interferer is estimated by measuring the transition density of the sign of the down-converted signal. RF interferers at a higher or lower frequency than the desired RF signal appear as high frequency content in the down-converted signal, thus increasing the likelihood of zero-crossings.

Abstract: A method and apparatus for controlling the power consumption of a receiver based on current operating conditions is described herein. A receiver according to the present invention applies a received signal to a variable filter. The received signal includes a desired in-band signal. Depending on the current operating conditions, the received signal may further include one or more unwanted out-of-band blocking signals. A filter controller controls one or more operating parameters of the variable filter to maintain the power ratio at the filter output of the power of the blocking signal(s) to the in-band signal at or below a desired level. In so doing, the present invention controls the receiver power consumption while still providing the desired receiver performance.

Abstract: A low noise amplifier includes an input transistor, an inductor, and a current sink. The input transistor includes a gate, a drain, and a source, wherein the gate of the input transistor is operably coupled to receive an input radio frequency (RF) signal. The inductor includes a first node and a second node, wherein the first node of the inductor is operably coupled to a power supply and the second node of the inductor is operably coupled to the drain of the input transistor to provide an output of the low noise amplifier. The current sink includes a first node and a second node, wherein the first node of the current sink is operably coupled to the source of the input transistor and the second node of the current sink is operably coupled to a circuit ground, wherein a real component of input impedance of the low noise amplifier is substantially constant when the low noise amplifier is in the off mode as when the low noise amplifier is in the on mode.

Abstract: An audio signal processing method includes: controlling the volume of a digital audio signal according to a latest value of an adaptive gain value which is adjustable; detecting whether data carried by the digital audio signal satisfies a specific criterion and utilizing a pendulum counter to count a number of times the data carried by the digital audio signal satisfies the specific criterion; if the counter value of the pendulum counter reaches an upper bond, selectively decreasing the adaptive gain value according to a decrement to decrease the volume of the digital audio signal; and if the counter value of the pendulum counter reaches a lower bond, selectively increasing the adaptive gain value according to an increment to increase the volume of the digital audio signal, where the magnitude of the decrement and the magnitude of the increment are different from each other.

Abstract: An active antenna array for a mobile communications network and a method for receiving radio signals is disclosed. The active antenna array has a plurality of antenna elements for relaying radio signals, a plurality of first amplifiers for amplifying a plurality of individual receive signals a plurality of first analogue-to-digital converters and a plurality of first gain switches located between one of the plurality of first analogue-to-digital converters and the plurality of first amplifiers. A digital signal processor is connected to outputs of the plurality of first analogue-to-digital converters and has a common gain switch control line connected to at least two of the plurality of first switches for controlling the gain of the first gain switches.

Abstract: A wireless distribution system includes a number of remote units distributed in a coverage area to receive wireless signals and to provide the signals through the distribution system to input ports of a node where the signals are combined, a number of input power monitors operatively connected to one or more of the input ports to determine power levels of signals received at the input ports, variable gain controllers to control signals received at some or all of the input ports, a node to combine a plurality of signals from the plurality of input ports, and a controller to provide control signals to control one or more of the variable gain controllers.

Abstract: A method of controlling operation of a wireless device configured in a zero intermediate frequency architecture including a DC loop and a gain loop. The method includes processing energy in a wireless medium to generate a corresponding receive signal, monitoring the receive signal via a predetermined measurement window, detecting a changed condition in the channel, holding the gain feedback control loop at a constant gain level, and operating the DC loop in an attempt to search a stable DC value for the receive signal while the gain loop is held constant. A first case is DC saturation, where the gain is held constant until DC is controlled. A second case is clear channel assessment, where a prior stored gain setting is applied to the gain loop after detecting the end of the packet. A third case is preparation for receiving an expected acknowledgement packet after transmitting a packet, where again a prior stored gain setting is applied to the gain loop and DC is searched.