Abstract: A receiving device that receives a signal in a receiving antenna. The receiving device includes a gain controller that adjusts a gain in the receiving device in response to information related to power of the signal, and a signal detector that determines whether, within a predetermined period after the information related to the power of the signal exceeds a first threshold value, the information related to the power of the signal exceeds a second threshold value which is larger than the first threshold value. The gain controller adjusts a search range of the gain in the receiving device based on a determination result of the signal detector with respect to the information related to the power of the signal.

Abstract: A wireless communication device includes more than one radio. A lossless switching module allows for selectively using one of the radios in a standby mode. The switching module allows for switching in the standby radio in the event that another radio fails without introducing any loss. In disclosed examples, switching module inputs coupled with inactive or failed radio output ports are coupled to an impedance corresponding to the associated radio. Disclosed examples are also useful for combining the outputs of more than one radio under selected circumstances.

Abstract: An electrically small receiver system is provided. The receiver system includes a plurality of antennas and a signal processing circuit. The plurality of antennas includes a first antenna configured to receive a first signal and a second antenna configured to receive a second signal. The signal processing circuit includes a phase shifter configured to apply a phase shift to the received second signal. The phase shift applied by the phase shifter is a function of an angle of incidence of the second signal measured relative to a boresight direction of the plurality of antennas. The signal processing circuit is configured to form an output signal that is a combination of the received first signal and the phase shifted second signal.

Abstract: A method for spectrum sensing is described comprising receiving a signal using a plurality of receive antennas; forming a set of received signals including the received signal of each antenna; determining a cyclic auto-correlation of the set of received signals; estimating, for each receive antenna, channel state information of the radio channel via which the receive antenna receives the signal based on the determined cyclic auto-correlation; performing maximum ratio combining of the received signal samples based on the estimated channel state information; determining a measure of the cyclostationarity of the received signal based on the result of the maximum ratio combining; and performing cyclostationarity detection spectrum sensing based on the determined measure of the cyclostationarity of the received signal.

Abstract: A radio frequency (RF) transmitter includes a transmitter processing module that generates a processed signal and a modulating signal based on outbound data. An up-conversion module up-converts the processed signal to generate an up-converted signal. A programmable filter module generates a first plurality of delayed signals from the up-converted signal and that generates a filtered up-converted signal by combining the up-converted signal and the first plurality of delayed signals, wherein a delayed signal of the first plurality of delayed signals is scaled based on one of a first plurality of coefficients, wherein the first plurality of coefficients are selected based on a control signal. A polar amplifier amplifies and amplitude modulates the filtered up-converted signal based on the modulating signal to generate a transmit signal. A processing module generates the control signal to attenuate at least one RF spur of the up-converted signal.

Abstract: An electronic device, includes sigma-delta modulation circuit to operate with a clock signal and having output circuitry to deliver a digital data signal. First circuitry delivers a radiofrequency transposition signal. A notch filter includes radiofrequency digital-to-analog conversion blocks, having first input circuitry coupled to the output circuitry. Second input circuitry receives the radiofrequency transposition signal. Second output circuitry delivers a radiofrequency analog signal. Digital delay circuitry is controlled by the clock signal and includes a delay block between the two first input circuits. The frequency of a notch of the notch filter is related to the value of the delay from the delay block. Summation circuitry sums the radiofrequency signals.

Abstract: A method of processing audio information for broadcast to an audience can include changing first audio information from occurring in a first time interval to occurring in a second time interval to provide time-changed audio information. The time-changed audio information can be combined with second audio information that is responsive to the first audio information to provide broadcast audio information.

Abstract: A wireless receiver detects signals received at two or more antennas, with each antenna coupled to an input receive chain. A switch is employed to couple selected input receive chains to one or more corresponding output receive chains during listening, coarse-detection, and fine-adjustment modes. At least one channel selection filter (CSF) is employed in each output receive chain, and the receiver employs sub-ranging. During idle mode, one antenna's input receive chain is connected to two or more CSFs to detect the packet. When the packet is detected, during a coarse-adjustment mode, the CSFs are reconfigured to couple each antenna's input receive chain to a corresponding output receive chain using low-gain signals. During fine-adjustment mode, the various gains are adjusted to be either high- or low-gain to maintain signals within the dynamic range of the corresponding CSFs.

Abstract: Communicating using a mesh network is disclosed. A frame length used for communicating a packet between a first node and a second node of a wireless mesh network is selected. A route from the first node to the second node is determined including one or more intermediate nodes that receive and transmit the packet. Node to node communications within the frame along the route is selected such that a communication latency time is below a predetermined limit time for a predetermined percentage of communications between the first node and the second node.

Abstract: A method of processing audio information for broadcast to an audience can include changing first audio information from occurring in a first time interval to occurring in a second time interval to provide time-changed audio information. The time-changed audio information can be combined with second audio information that is responsive to the first audio information to provide broadcast audio information.

Abstract: A wireless receiver detects signals received at two or more antennas, with each antenna coupled to an input receive chain. A switch is employed to couple selected input receive chains to one or more corresponding output receive chains during listening, coarse-detection, and fine-adjustment modes. At least one channel selection filter (CSF) is employed in each output receive chain, and the receiver employs sub-ranging. During idle mode, one antenna's input receive chain is connected to two or more CSFs to detect the packet. When the packet is detected, during a coarse-adjustment mode, the CSFs are reconfigured to couple each antenna's input receive chain to a corresponding output receive chain using low-gain signals. During fine-adjustment mode, the various gains are adjusted to be either high- or low-gain to maintain signals within the dynamic range of the corresponding CSFs.

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 method of processing audio information for broadcast to an audience can include changing first audio information from occurring in a first time interval to occurring in a second time interval to provide time-changed audio information. The time-changed audio information can be combined with second audio information that is responsive to the first audio information to provide broadcast audio information.

Abstract: A radio comprises a receiver and a variable delay circuit. The receiver generates an electrical signal. The variable delay circuit delays the electrical signal by a variable delay time and outputs a delayed electrical signal. The variable delay time is manually adjusted to correspond the delayed electrical signal with a display from an external audio and video receiver.

Abstract: The present invention avoids distortion in a radio frequency device due to a received RF signal which has a voltage strength that is too high. The invention comprises a radio frequency signal attenutation circuitry, a radio frequency signal processing circuitry, intermediate frequency processing circuitry, and a gain controlling unit. The gain controlling unit is configured to output a control signal to the radio frequency signal attenuation circuitry and intermediate frequency processing circuitry. The radio frequency signal attenuation circuitry is configured to attenuate a radio frequency signal prior to being processed by radio frequency processing circuitry and intermediate frequency processing circuitry. Accordingly, saturation in the radio frequency signal processing circuitry and intermediate frequency processing circuitry is avoided.

Abstract: A soft limiter for a signal processor includes a variable-gain amplifier, and a threshold detector. The variable-gain amplifier includes a signal input for receiving an input signal, a signal output for providing an output signal representative of the input signal, and a gain control input for controlling a gain of the amplifier. The threshold detector is coupled to the gain control input, and includes a control input for receiving a control variable thereon. The threshold detector is configured to set the gain of the amplifier to a first gain value when the control variable exceeds a threshold value, and to set the gain to a second gain value different from the first gain value when the control variable is less than the threshold value.

Abstract: A radio comprises a receiver and a variable delay circuit. The receiver generates an electrical signal. The variable delay circuit delays the electrical signal by a variable delay time and outputs a delayed electrical signal. The variable delay time is manually adjusted to correspond the delayed electrical signal with a display from an external audio and video receiver.

Abstract: A data portion measuring section 103 measures a reception level of a data portion of a received signal, and a pilot portion measuring section 104 measures a reception level of a pilot portion of the received signal. A comparing/selecting section 105 compares the reception level of the data portion with that of the pilot portion, and selects a higher reception level. An AGC gain value calculating section 106 calculates an AGC gain value from the higher reception level selected by the comparing/selecting section 105 and an input allowable level of A/D conversion.