The present technology relates to a signal processing apparatus and method which can suppress increase in power consumption.

In an aspect of the present technology, control data, which is for controlling frequency modulation to a carrier signal using digital data to be transmitted, and for suppressing a time average of a fluctuation amount of a frequency modulation amount more than a case of controlling the frequency modulation to the carrier signal using the digital data is generated, the frequency modulation is performed to the carrier signal on the basis of the generated control data, and the carrier signal to which the frequency modulation is performed is transmitted as a transmission signal. The present technology can be applied to, for example, a signal processing apparatus, a transmission apparatus, a reception apparatus, a communication apparatus, or an electronic apparatus having a transmission function, a reception function, or a communication function, or a computer which controls these.

An apparatus and a method. The apparatus includes a channel estimation (CE) module, including a first input for receiving pilot resource element (RE) observations, a second input for receiving data RE observations, a third input for receiving log-likelihood ratios (LLRs), and an output; a detector, including a first input connected to the output of the CE module, a second input for receiving data RE observations, and an output connected to the third input of the CE module; and a decoder, including an input connected to the third input of the CE module, and an output.

A 5th generation (5G) or pre-5G communication system for supporting a data transmission rate higher than that of a 4th generation (4G) communication system, such as long term evolution (LTE) is provided. The wireless communication system, includes a plurality of antennas for identifying a plurality of radio signal, a receiver for receiving the plurality of the radio signals via the plurality of the antennas, wherein the receiver may include a coupler circuit for coupling the plurality of the received signals to different signal paths, to generate a first coupling signal by summing the plurality of the received signals and a second coupling signal corresponding to a difference of the plurality of the received signals, and a beam generator for generating a plurality of beamformed signals based on in-phase signals and quadrature-phase signals corresponding to the first coupling signal and the second coupling signal.

This disclosure describes systems, and methods related to signal classification in a wireless communication network. A first computing device comprising one or more processors and one or more transceiver component may receive a signal transmission packet comprising a physical layer (PHY) preamble. The first computing device may identify within the PHY preamble, one or more signal (SIG) fields, wherein at least one of the one or more SIG fields includes at least a length field indicating a length of the signal transmission packet. The first computing device may determine based at least in part on the length field, that the signal transmission packet is associated with a predetermined communication standard utilized to transmit the signal transmission packet. The first computing device may decode the signal transmission packet based at least in part on the determination that the signal transmission packet is associated with the predetermined communication standard.

This disclosure describes systems, and methods related to signal classification in a wireless communication network. A first computing device comprising one or more processors and one or more transceiver component may receive a signal transmission packet comprising a physical layer (PHY) preamble. The first computing device may identify within the PHY preamble, one or more signal (SIG) fields, wherein at least one of the one or more SIG fields includes at least a length field indicating a length of the signal transmission packet. The first computing device may determine based at least in part on the length field, that the signal transmission packet is associated with a predetermined communication standard utilized to transmit the signal transmission packet. The first computing device may decode the signal transmission packet based at least in part on the determination that the signal transmission packet is associated with the predetermined communication standard.

Certain aspects of the present disclosure relate to methods and apparatus for pilot design for Narrow-Band Internet of Things (NB-IoT). In certain aspects, the method generally includes determining at least one binary code sequence to use as a demodulation reference signal (DMRS) for a channel transmitted across one or more subframes using one or more tones within a resource block (RB) allocated to the UE for narrowband communication, and transmitting the channel including the DMRS using the one or more tones and the determined binary code sequence. In certain aspects, the binary code sequence may be determined based on a binary random sequence, such as pseudo noise (PN) or Gold sequence.

Systems, devices and techniques for receiving a signal comprising a quadrature duobinary modulated signal include performing channel equalization of the received signal using a constant multi-modulus to obtain a set of channel estimation coefficients and a stream of symbols, partitioning, based on modulus, the stream of symbols into three partitions, estimating carrier frequency based on the partitioned stream of symbols, recovering a phase of the signal using a maximum likelihood algorithm, and decoding the partitioned stream of symbols to recover data.

A method of encoding a first bit and a second bit for transmission on a transmission band is provided. The method includes: mapping, via a mapping component, the first bit and the second bit into a first symbol; mapping, via the mapping component, the first bit and the second bit into a second symbol; dividing, via a dividing component, the transmission band into subcarriers; allocating, via an allocating component, the first symbol to a first subcarrier of the subcarriers; allocating, via the allocating component, the second symbol to a second subcarrier of the subcarriers; and differentially encoding, via a differential encoder, the first symbol and the second symbol.

A method of encoding a first bit and a second bit for transmission on a transmission band is provided. The method includes: mapping, via a mapping component, the first bit and the second bit into a first symbol; mapping, via the mapping component, the first bit and the second bit into a second symbol; dividing, via a dividing component, the transmission band into subcarriers; allocating, via an allocating component, the first symbol to a first subcarrier of the subcarriers; allocating, via the allocating component, the second symbol to a second subcarrier of the subcarriers; and differentially encoding, via a differential encoder, the first symbol and the second symbol.

A DARC signal demodulation circuit assemblage for recovering a DARC signal (DARC data) from an FM multiplex transmission signal includes: a pilot tone regulation circuit to obtain first and second mutually orthogonal oscillation synchronous with a stereo pilot tone encompassed by the FM multiplex transmission signal; a frequency quadruplication section for obtaining third and fourth mutually orthogonal oscillation having a frequency quadrupled as to the stereo pilot tone; a first multiplication section for obtaining a first multiplication signal from the FM multiplex transmission signal and from the third oscillation; a second multiplication section for obtaining a second multiplication signal from the FM multiplex transmission signal and from the fourth oscillation; first/second low-pass filters for obtaining first/second DARC signal components by low-pass filtration of the first and second multiplication signals; and an FM demodulation section for obtaining the DARC signal from a frequency demodulation of the first/second DARC signal components.