Abstract: The invention relates to the field of terrestrial broadcast transmission, more specifically, to a channel estimation method. A channel estimation method used for estimating a channel of a next carrier signal frame, the channel estimation method comprising: equalizing a carrier of the current signal frame and of the channel of the current signal frame, to obtain a transmission sequence of the current signal frame and a signal-to-noise ratio of the current signal frame, calculating the transmission sequence to get the reference channel, generating an initial channel estimation based on the signal-to-noise ratio of the signal frame, processing the estimated initial channel and the reference channel by an adaptive filtering method, to obtain an estimated channel of next signal frame.

Abstract: A transmitting apparatus for modulating data based on a predetermined 2q-QAM constellation and a receiving apparatus and method for demodulating a signal based on the predetermined 2q-QAM constellation, wherein the last q-2 bits corresponding to a quadrant of the predetermined 2q-QAM constellation are same with a gray code of a 2q-2-QAM constellation, the last q-2 bits corresponding to the remaining quadrants of the predetermined 2q-QAM constellation are determined by performing symmetric transformation for the last q-2 bits of the quadrant of the predetermined 2q-QAM around the x-axis or the y-axis.

Abstract: The present invention relates to a method and apparatus for transceiving data. A method in which a transmitting terminal transmits data to a receiving terminal in a MIMO system according to one embodiment of the present invention comprises the following steps: generating a data field containing the data; generating a signal field containing information on the data field; generating a data frame containing the data field and the signal field; and transmitting the data frame to the receiving terminal. According to the present invention, an end of the frame being transmitted is accurately notified to the receiving terminal in a communication system in which the frame is transmitted using MIMO, thereby decoding the frame in a more efficient manner at the receiving terminal.

Abstract: By a transmission method according to one aspect of the present disclosure, in a broadcasting system that generates a first broadcasting signal and a second broadcasting signal by performing multi-antenna encoding on program data, and wirelessly transmits a first broadcasting signal and a second broadcasting signal, a first transmit station transmits the first broadcasting signal, a second transmit station transmits the second broadcasting signal, the first transmit station and the second transmit station transmit the first broadcasting signal and the second broadcasting signal to an overlapping area at an identical time using an overlapping frequency band, polarized wave transmitted from the first transmit station differs from polarized wave transmitted from the second transmit station, and arrangement of the first transmit station differs from arrangement of the second transmit station.

Abstract: A first communication device generates a plurality of samples from a sampled signal. The sampled signal corresponds to a first sampling frequency, and the plurality of samples correspond to a second sampling frequency that is greater than the first sampling frequency. Additionally, the sampled signal corresponds to a transmission signal transmitted from a second communication device to the first communication device. The first communication device generates a correlation signal using the plurality of samples, and uses the correlation signal to generate an estimate of a time at which the transmission signal was received at the first communication device.

Abstract: A characterization system includes a signal detector. The signal detector includes a first conversion unit configured to receive, from a first device, a first device output signal including N possible discrete pulse amplitudes and generate a plurality of detected signals based on a plurality of threshold amplitudes respectively. The signal detector further includes a second conversion unit configured to generate a first conversion output signal and a second conversion output signal based on logic values included in the plurality of detected signals and provide first and second conversion output signals to an analysis unit for generating one or more measurements of the first device. The first and second conversion output signals include M1 and M2 possible discrete pulse amplitudes respectively. M1 and M2 are integers less than N.

Abstract: In aspects, apparatus and methods of wireless communication, and more specifically of improved mitigation of interference caused by a transmitter are provided. For example, in aspects, a method of interference mitigation of wireless communication is provided including transmitting at least one transmit signal from at least one transmit chain of a user equipment (UE) over a wireless medium, receiving a composite signal that includes a desired receive signal transmitted from a device and a distortion signal, generating a modified composite signal by removing at least a portion of the desired receive signal from the composite signal, generating a distortion signal estimate based on the modified composite signal, and canceling the distortion signal estimate from the composite signal. Numerous other aspects are provided.

Abstract: Methods and systems are described for receiving N phases of a local clock signal and M phases of a reference signal, wherein M is an integer greater than or equal to 1 and N is an integer greater than or equal to 2, generating a plurality of partial phase error signals, each partial phase error signal formed at least in part by comparing (i) a respective phase of the M phases of the reference signal to (ii) a respective phase of the N phases of the local clock signal, and generating a composite phase error signal by summing the plurality of partial phase error signals, and responsively adjusting a fixed phase of a local oscillator using the composite phase error signal.

Abstract: Presented is a generator of binary code shift key (CSK) codes pre-saved to memory usable for time synchronous CSK code retrievals with extraction capability for 1 of 16 orthogonal CSK symbol codes under control of a supported communications system. The CSK code generator pre-defines a 1332 root prime number sequence containing 6 unique prime numbers including 221-7s, 222-11s, 221-13s, 223-17s, 222-19s, and 223-23s that receive multiple index shuffles of 1332 indexes. Pairs of 1332 shuffled indexes of prime sequences are then merged and formatted into 100 tier0 100 hex character format codes. Two levels of XORs of hex character format code pairs generate CSK codes that are collected into 10000 code files that are saved to memory. Time-synchronous CSK code retrieval is followed by 1 of 16 CSK orthogonal symbol codes extraction based on new half-byte data values under flow control of the supported communications system.

Abstract: Satellite controller circuitry includes a connection (i.e. coaxial or single wire with ground), with a control unit receiving a data message and generating a response message as output, and transmitter circuitry transmitting the response message. The transmitter circuitry has a first transistor having a first conduction terminal coupled to the connection, a second conduction terminal coupled to ground, and a control terminal coupled to receive output from the control unit, a second transistor having a first conduction terminal coupled to the connection, a second conduction terminal coupled to ground, and a control terminal coupled to receive the output from the control unit. The first and second transistors are configured such that a second current flowing through the first conduction terminal of the second transistor is in a non-unity ratioed relationship, or in a unity ratioed relationship, with a first current flowing through the first conduction terminal of the first transistor.

Abstract: An apparatus of a wireless device has a storage element to store data from a first data stream and a second data stream and a processing component operatively coupled to the storage element. The processing component selects a first set of data from the first data stream to be transmitted and determines one or more subcarriers of a plurality of available subcarriers to transmit at a first power level to represent the first set of data. The processing component also selects a second set of data from the second data stream and encodes the second set of data at a second power level on a set of remaining subcarriers that are not to be transmitted at the first power level. The processing component may then generate a symbol to be transmitted comprising the plurality of subcarriers.

Abstract: A transmitter includes: a transmission control circuit that determines whether or not to perform an emphasis on a data signal, based on a transition pattern of the data signal; and a transmission driver that selectively performs the emphasis based on a result of the determination by the transmission control circuit, to generate at least one transmission signal.

Abstract: In some embodiments, a DFE including: an input terminal configured to receive an input signal carrying a plurality of symbols; an adder circuit coupled to the input terminal of the DFE; a plurality of comparator circuits configured to receive respective threshold signals; a plurality of slicer circuits coupled to respective comparator circuits of the plurality of comparator circuits; and a plurality of multiplier circuits coupled to respective slicer circuits of the plurality of slicer circuits, the plurality of multiplier circuits configured to multiply respective correction coefficients of a plurality of correction coefficients times respective outputs of respective slicer circuits to produce respective multiplication results of a plurality of multiplication results, where: the adder circuit is configured to subtract the plurality of multiplication results from the input signal, and the plurality of correction coefficients are independently adjusted based on a previously received symbol.

Abstract: A loop powered process instrument comprises a control system including a control circuit, a modem circuit and a loop output circuit. The control circuit measures a process variable and develops a measurement signal representing the process variable and includes a loop control circuit and a communication circuit. The modem circuit is operatively connected to the communication circuit and includes a modulation input port and a modulation output port. The loop output circuit receives a measurement signal from the loop control circuit and is connected to the modulation input port. A two-wire circuit is for connection to a remote power source using a two-wire process loop. A power supply with isolation is connected to the two-wire circuit and the loop output circuit to isolate the two-wire circuit from the control system.

Abstract: A communications node operable to communicate with another communications node over a communications channel having a plurality of frequency resources, the communications node includes data defining a division of the communications channel into a plurality of contiguous sub-bands each having N frequency resources, wherein each frequency resource in a sub-band has a corresponding frequency resource in each of the other sub-bands, data defining an initial allocation of the frequency resources, a resource determination module operable to apply a frequency shift to the initially allocated frequency resources in accordance with a frequency hopping sequence to determine frequency resources to use for communicating information with the other communications node, wherein the frequency shift applied moves the initially allocated frequency resources to corresponding frequency resources in another sub-band, a transceiver for communicating information with the other communications node using the determined frequency reso

Abstract: The present invention relates to a wireless communication system, and more particularly, to a method and device for performing or supporting NIB coordinated multi-point (CoMP) transmission in a wireless communication system. The method and device for performing NIB CoMP transmission in the wireless communication system according to an embodiment of the present invention include: receiving signaling comprising at least one CoMP hypothesis set and at least one benefit metric from a first network node, at a second network node; and performing CoMP transmission based on the at least one CoMP hypothesis set, at the second network node. The at least one CoMP hypothesis set comprises information on hypothetical operation of CoMP network nodes.

Abstract: Some demonstrative embodiments include apparatuses, devices, systems and methods of communicating a Single Carrier (SC) Space Time Block Coding (STBC) transmission. For example, a station may generate a plurality of space-time streams including at least a first space-time stream and a second space-time stream, the first space-time stream including, in a first interval, a first data sequence followed by a first Guard Interval (GI) sequence, the second space-time stream including, in the first interval, a second data sequence followed by a second GI sequence, the first space time stream comprising, in a second interval subsequent to the first interval, a sign-inverted and time-inverted complex conjugate of the second data sequence followed by the first GI sequence, the second stream including, in the second interval, a time-inverted complex conjugate of the first data sequence followed by the second GI sequence; and transmit a SC STBC transmission based on the plurality of space-time streams.

Abstract: An inductor-less local oscillator (LO) signal generation apparatus configured to generate one or more output signals which reduce a frequency pulling effect. The LO signal generation apparatus includes a multi-phase signal generation circuit, a phase signal generation circuit and one or more output circuits. The multi-phase signal generation circuit receives an input clock signal having a first frequency to generate a multi-phase clock signal. The multi-phase clock signal includes a plurality of clock signals each having the first frequency and different phases. The phase signal generation circuit is coupled to the multi-phase signal generation circuit to receive the multi-phase clock signal and output a plurality of phase signals indicating the phases of the clock signals. The one or more output circuits output the one or more output signals according to the clock signals and the phase signals without receiving feedback of any of the one or more output signals.

Abstract: An approach for increasing transmission throughput of a non-linear wireless channel, and efficient decoding of the transmitted signal via a simplified receiver, is provided. A signal reflects a source signal, and includes linear inter-symbol interference based on a faster-than-Nyquist signaling rate and a tight frequency roll-off, and non-linear interference based on high-power amplification for transmission over the wireless channel. The signal is received over a non-linear wireless channel, and is processed via a plurality of decoding iterations. A set of soft information of a current decoding iteration is generated based on a current estimate of the source signal and a final set of soft information from a previous decoding iteration. The current estimate of the source signal is based on an estimate of the linear ISI and the non-linear interference, which is based on the final set of soft information from the previous decoding iteration.

Abstract: An alternative type of vector signaling codes having increased pin-efficiency normal vector signaling codes is described. Receivers for these Permutation Modulation codes of Type II use comparators requiring at most one fixed reference voltage. The resulting systems can allow for a better immunity to ISI-noise than those using conventional multilevel signaling such as PAM-X. These codes are also particularly advantageous for storage and recovery of information in memory, as in a DRAM.