Abstract: The present disclosure is directed to a reconfigurable repeater system. A system may comprise a PCB to which devices are coupled. At least one communication channel may convey communications signals between the devices. At least one receptacle may also be coupled to the PCB and may intersect the at least one communication channel so as to separate the at least one communication channel into sections. Inserting at least one extender module into the at least one receptacle may couple the at least one extender module to the sections of the communication module. The at least one extender module may include at least one conductor to convey communication signals between the sections of the at least one communication channel. Another configuration of the at least one extender module may include a repeater to receive, amplify and transmit communication signals between the sections of the at least one communication channel.

Abstract: The invention relates to a method of transmitting a signal comprising successive multi-carrier symbols with M subcarriers arranged in a frame, defined by a preamble comprising a first multi-carrier symbol: P 0 ? [ k ] = ? m = 0 M - 1 ? p m , 0 ? g ? [ k ] ? ? j ? 2 ? ? M ? m ? ( k - D 2 ) ? ? j ? ? ? ? m 2 and a second multi-carrier symbol: P 1 ? [ k ] = ? m = 0 M - 1 ? p m , 1 ? g [ mod ( k - N , M ) ] ? ? j ? 2 ? ? M ? m ? ( k - D 2 ) ? ? j ? ? ? ( m + 1 ) 2 . The pilot symbols pm,0 are such that: p m , 0 = { ? m , m ? ? even 0 , m ? ? odd ? ? and ? ? p m , 1 = { p m , 0 ? ( - j ) , m ? ? even 0 , m ? ? odd with ?m a real random variable.

Abstract: An integrated circuit includes a comparator capable of generating an up/down signal by comparing a feedback signal with a reference signal; a restoration signal generation unit capable of enabling a restoration signal when the up/down signal maintains an identical value for greater than or equal to a first specific time and changes afterwards; a processing circuit including one or more stages for sequentially processing the up/down signal, wherein a last one of the one or more stages holds a process result thereof for a second specific time when the restoration signal is enabled; and a feedback unit capable of generating the feedback signal in response to the process result of the last stage.

Abstract: A decision-feedback equalizer (DFE) samples an analog input signal against M references during the same symbol time to produce M speculative samples. Select logic in the DFE then decodes N bits resolved previously for previous symbol times to select one of the M speculative samples as the present resolved bit. The present resolved bit is then stored as the most recent previously resolved bit in preparation for the next symbol time. The select logic can be can be programmable to accommodate process, environmental, and systematic variations.

Abstract: Systems and method for improving operation of a radio frequency system are provided. One embodiment includes instructions to execute a coarse calibration to associate a first output power with a first operational parameter set; instruct the radio frequency system to transmit a signal based at least in part on the first operational parameter set and a base detrough function; determine performance metrics resulting from transmission of the signal; determine changes in the performance metrics resulting from operating the radio frequency based at least in part on the first operational parameter set and each of a plurality of augmented detrough functions; and associate a second operational parameter set with a second output power, in which the second operational parameter set includes one of the plurality of augmented detrough functions selected based at least in part on the changes that reduce margin between the performance metrics and performance metric thresholds.

Abstract: Systems and methods for delivering energy on a bus used for communication between devices are provided. Systems and methods dynamically provide a predetermined recovery time between communication messages calculated from forward and response message types and/or length, and a model of the energy reserve in the network devices to allow time for energy storage circuits in the devices to charge. In addition or alternatively, systems and methods provide an extra recovery time between messages to allow the bus voltage to recover from a fold-back mode and/or include an extra current limit circuit to increase a power supply current when the combined energy required by the network devices is greater than a current limit on a power supply.

Abstract: A digital I/Q reprocessing demodulator and a process for significantly reducing arctangent computational loads. This is done by ensuring that all calculations are carried out in the linear part of the curve. The architecture of the demodulator is such that the demodulator 100 utilizes two I/Q stages. The first stage is utilized to determine a phase offset with regards to the free-running I/Q clocks. In the second processing stage, the phase of the I/Q reference signals are phase shifted based on the initial estimate such that the incoming carrier signal is nearly in-phase.

Abstract: A method for multi-carrier transmission of a signal including OFDM blocks formed from N carriers modulated by a constellation symbol. The method includes, for at least one OFDM block: a phase of prebuilding M prebuilt complex time samples representative of the N carriers of the OFDM block, and a phase of correcting the constellation symbols modulating the N carriers, including the following acts, repeated for each carrier: detection of P samples having a power higher than a predefined threshold, delivering the P samples and M?P zero samples, forming M complex time samples to be corrected, correcting the constellation symbol on the basis of the M complex time samples to be corrected, delivering an item of complex correction data, building M complex time samples associated with the item of complex correction data, and updating the M prebuilt complex time samples.

Abstract: A method for serial data transmission between a position-measuring device and subsequent electronics over a bidirectional data channel includes transmitting data in data frames and in encoded form in accordance with a data transmission code. The data transmission in each case is initiated by an interface unit at a transmitter end with a start sequence having an encoding scheme that at least partially differs from an encoding scheme of a remainder of the data frames. After a reversal of data direction, an interface unit at a receiver end detects a beginning of the data transmission in each case by detection of the start sequence.

Abstract: Circuits comprising: digital-to-amplitude converter (DAC), comprising: binary weighted switching transistors (BWSTs), each having gate coupled to amplitude control bit ACB, and wherein the drain of each of the BWSTs are connected together and wherein the source of each of the BWSTs are connected together; transistor M1 having gate coupled to input signal and first bias voltage BV1 and source coupled to the drains of the BWSTs; transistor M2 having gate coupled to BV2 and source coupled to the drain of M1; transistor M3 having gate coupled to BV3 and source coupled to the drain of M2; transistor having gate coupled to BV4, source coupled to the drain of M3; and inverter having input coupled to another ACB and having output coupled to the output of the DAC and the drain of M4.

Abstract: A network node and a method performed by a network node for protecting control channels of a neighboring RBS, the network node and the RBS being operable in an OFDM based radio communication network are provided. An RBS and a method performed by an RBS for transmitting control channels to UEs currently being associated with the RBS in an OFDM based radio communication network are also provided. The method in the network node comprises determining (220) at least one subframe out of a predetermined number of subframes in which control channels are to be transmitted with reduced transmission power in relation to a nominal transmission power; and informing (230) the RBS which subframe(s) out of the predetermined number of subframes in which control channels are to be transmitted with reduced transmission power.

Abstract: According to an embodiment, a transmission circuit is configured to transmit a signal to a reception circuit through a transmitting AC coupling element. The transmitting AC coupling element is AC coupled to a receiving AC coupling element. The transmission circuit includes a drive signal generation circuit and a drive circuit. The drive signal generation circuit is configured to generate a drive signal in synchronization with a transmission signal to be transmitted. The drive circuit is configured to cause, in response to the drive signal, a drive current to flow between both ends of the transmitting AC coupling element in synchronization with a rising edge and a falling edge of the transmission signal during a driving period set in advance. The drive circuit is configured to apply an applied voltage to both of the ends of the transmitting AC coupling element after the driving period.

Abstract: Methods, systems, and circuits for providing reception and capture of data using a mismatched impedance and an equalizer to save power are disclosed. A data receiver in communication with a transmission line, the data receiver having a termination impedance that is mismatched with respect to a characteristic impedance of the transmission line; and an equalizer in communication with the data receiver, the equalizer configured to receive a channel-transmitted data signal from the data receiver and to re-shape the signal to reduce distortion RC attenuation; wherein the circuit is configured to selectably operate in a first mode wherein the termination impedance is matched with respect to the characteristic impedance of the transmission line and a second mode wherein the termination impedance is mismatched with respect to the characteristic impedance of the transmission line and the signal is not recoverable but for the equalizer.

Abstract: Methods and apparatuses are provided for channel equalization in a communication system. The method includes initializing, using processing circuitry, filter coefficients of an adaptive decision feedback equalizer randomly in a predetermined search space. Further, the method includes updating, using the processing circuitry, the filter coefficients. The filter coefficients are updated using a least mean square recursion when the filter coefficients are stagnant. The filter coefficients are updated using a particle swarm optimization procedure when the filter coefficients are not stagnant. Further, the updating step is repeated until a predetermined stopping criteria is met. Further, the method includes, filtering, using the processing circuitry, a received signal using the filter coefficients.

Abstract: A Continuous Time Linear Equalizer (CTLE) and a method of operating a CTLE in a receiver for a Pulse Amplitude Modulation (PAM) signal are disclosed. The method includes initiating equalization using an initial equalization setting that is optimized to meet a first objective and responsive to a determination, shifting to a final equalization setting that is optimized to meet a second objective.

Abstract: An optical feed network for a phased-array antenna may comprise a phase-based feed network that may include electro-optical phase shifting.

Abstract: An RF device includes an impedance transformation circuit having a plurality of first RF couplers. Each first RF coupler includes a first portion of a first transmission line winding disposed on at least one first printed circuit board (PCB) and is configured to be electromagnetically coupled to a first portion of a second transmission line winding disposed on at least one second printed circuit board (PCB). The RF device also includes a balun circuit includes a plurality of second RF couplers coupled to balanced port connections, each second RF coupler including a second portion of the first transmission line winding wound around the first portion of a first transmission line winding and configured to be electromagnetically coupled to a second portion of the second transmission line winding wound around the first portion of a second transmission line winding.

Abstract: Method embodiments are provided herein for dynamically calibrating and adjusting a direct conversion receiver system. One embodiment includes applying one or more gain control signals to one or more gain elements of a receiver system, where the applying one or more gain control signals results in a gain change to the receiver system; in response to the gain change, determining whether the receiver system exhibits a DC (direct conversion) offset; and in response to a determination that the receiver system exhibits the DC offset, applying one or more DC offset correction control signals to one or more gain elements of the receiver system, where the one or more DC offset correction signals are configured to correct the DC offset.

Abstract: A very low intermediate frequency (VLIF) receiver and a method of controlling a VLIF receiver. The method comprises estimating energy levels in first and second signals and detecting interference from a first adjacent channel interferer based upon a difference in energy in the first and second signals. The first signal comprising a first on-channel portion and an adjacent channel portion and the second signal comprises an intermediate frequency translation of the first on-channel portion. The energy levels are estimated for corresponding time instances and the adjacent channel interferer is of the adjacent channel portion. The VLIF receiver is then controlled based upon the detected interference.

Abstract: A receiving apparatus 10 includes an adaptive array antenna 11, a reference signal synthesizer 15 that calculates a synthesized reference signal by multiplying a reference signal portion of each layer by an orthogonal signal to synthesize proximity reference signal portions of different resource elements and multiplies a known reference signal by the orthogonal signal, a weight calculator 16 that calculates an adaptive array weight from the synthesized reference signal and a known reference signal multiplied by the orthogonal signal, a weight synthesizer 17 that calculates a synthesized reception signal by multiplying the reference signal portion by the adaptive array weight to perform an antenna synthesis, a channel estimator 18 that estimates a propagation path from the synthesized reception signal and the known reference signal multiplied by the orthogonal signal, and a channel equalizer 19 that implements a channel equalization from the synthesized reception signal and the propagation path.