The present application relates to a wireless signal decoding method, which is used to decode an electric signal converted from a wireless signal, where the decoding method includes the following steps: recording a duration of each level of the electric signal; calculating an average value of m maximum durations and an average value of n minimum durations, where m and n are positive integers and are determined by referring to a distribution percentage value of first binary bit values and a distribution percentage value of second binary bit values in data respectively; calculating a decision duration according to the first average value and the second average value; comparing the duration of each level with the decision duration, and according to a comparison result, determining a binary bit value represented by the level; and integrating all binary bit values to restore the data represented by the electric signal.

Provided is an optical receiver module which includes a conversion unit which converts an input optical signal to an electrical signal, an amplification unit which amplifies the electrical signal and outputs an amplified signal, a reception unit which directly or indirectly receives the amplified signal, and an offsetting unit which offsets the electrical signal such that a difference between a center of an intensity width of the electrical signal and a center of an intensity range of a signal capable of being received by the reception unit becomes small.

An audio channel control circuit includes a filter module and a determining module. The audio channel control circuit receives a first audio signal and a second audio signal from an audio device. The first audio signal loads a first carrier signal, while the second audio signal loads a second carrier signal. The first carrier signal and the second carrier signal have different phases. The filter module filters the first audio signal and the second audio signal, separating the first carrier signal from the first audio signal and the second carrier signal from the second audio signal. According to the phases of the first carrier signal and the second carrier signal, the determining module chooses a speaker of the left audio channel or a speaker of the right audio channel to output the first audio signal or the second audio signal.

A reconfigurable and timely accurate method of generating, with a low latency, an output signal in response to multiple input signals, wherein said input signals occur at independent times, and wherein the occurrence of several input signals according to predetermined pattern is interpreted as a Super Event and wherein a detected Super Event triggers the production of a specific output signal heralding this Super Event, characterized in that said method comprises a first step of time acquisition of the occurrence of said input signals, a second step of adaptation of the acquisition data flow to the clock of the reconfigurable processing unit, a third step of determining the occurrence of a Super Event by comparing the events pattern to the super event definition, a fourth step identifying the Super Event and generating at least one event/signal corresponding to at least one trigger signal, a fifth step of adaptation of the generation data flow to the asynchronous generation device, a sixth step of applying a predefined delay for the issue of the at least one trigger signal, and an seventh step of outputting at least one output signal representing a trigger signal and sending it to a downstream unit.

An on-chip AC coupled receiver with offset calibration. The receiver includes AC coupling circuitry to couple a differential input signal into a coupled differential signal having a first signal and a second signal. The receiver includes a first comparator to generate a first error signal indicative of whether a first reference signal is greater or smaller than a signal derived from the coupled differential signal. The receiver includes a second comparator to generate a second error signal indicative of whether a second reference signal is greater or smaller than the signal derived from the coupled differential signal. The receiver further includes feedback circuitry to adjust a voltage offset between the first signal and the second signal of the coupled differential signal based on the first error signal and the second error signal.

In a coherent receiver of an optical communication system, a method of processing a detected symbol estimate to determine a most likely value of a corresponding transmitted data word, the transmitted data word comprising one or more data bits encoded in a transmitter using a predetermined constellation of at least two symbols. A set of two or more virtual constellation points are define in a decision region corresponding to a possible value of the data word. The detected symbol estimate is processed to find a most likely virtual constellation point given the detected symbol estimate. The most likely value of the corresponding transmitted data word is determined based on the most likely virtual constellation point.

A signal decision circuit includes: a first decision circuit configured to identify a voltage level of an input signal using an average level of an amplitude of the input signal as a first threshold level; a detection circuit configured to detect an average of an amplitude absolute level based on the average level of the amplitude; a second decision circuit configured to identify a voltage level of the input signal using a second threshold level obtained by adding the average of the amplitude absolute level to the average level of the amplitude; and a third decision circuit configured to identify a voltage level of the input signal using a third threshold level obtained by subtracting the average of the amplitude absolute level from the average level of the amplitude.

A burst-signal reception circuit that receives a differential signal of a burst signal input via a preamplifier. The burst-signal reception circuit includes a differential amplifier to which the differential signal is input via capacitors, an average detection circuit that detects an average of a differential input signal to the differential amplifier, and a differential-offset cancel circuit that operates to cancel a DC voltage level difference of the differential input signal on the basis of output signals of the average detection circuit. Average detection speed of the average detection circuit is configured to be switched according to presence or absence of burst signal reception. The average detection speed is switched to a high-speed side in a head portion of the burst signal and switched to a low-speed side in portions other than the head portion.

Disclosed herein are methods, devices, and system for beam forming and beam steering within ultra-wideband, wireless optical communication devices and systems. According to one embodiment, a free space optical (FSO) communication apparatus is disclosed. The FSO communication apparatus includes an array of optical sources wherein each optical source of the array of optical sources is individually controllable and each optical source configured to have a transient response time of less than 500 picoseconds (ps).

The invention concerns an optical receiver comprising: a photodiode (102) coupled to the input of a trans-impedance amplifier (308) such that the trans-impedance amplifier receives the current (I.sub.PD) of the photodiode; a first comparator (112) adapted to compare an output voltage (V.sub.OUT) of the trans-impedance amplifier (308) with a threshold voltage (V.sub.TH); and a threshold control block (314) for generating the threshold voltage (V.sub.TH), wherein the threshold control block (314) comprises at least one capacitor coupled to the output (110) of the trans-impedance amplifier (308) via at least one switch.