An apparatus including: a communication unit configured to perform radio communication; and a control unit configured to perform control such that control information regarding a resource to which a filter for limiting a width of a guard band in a frequency band to be used in the radio communication is applied is transmitted to an external apparatus through the radio communication. The filter improves frequency use efficiency.

Examples described herein include systems and methods which include wireless devices and systems with examples of mixing input data with coefficient data specific to a processing mode selection. For example, a computing system with processing units may mix the input data for a transmission in a radio frequency (RF) wireless domain with the coefficient data to generate output data that is representative of the transmission being processed according to a specific processing mode selection. The processing mode selection may include a single processing mode, a multi-processing mode, or a full processing mode. The processing mode selection may be associated with an aspect of a wireless protocol. Examples of systems and methods described herein may facilitate the processing of data for 5G wireless communications in a power-efficient and time-efficient manner.

Different numerologies may be used to communicate orthogonal frequency division multiplexing (OFDM)-based signals over different frequency sub-bands of a given carrier. This may allow the OFDM-based signals to efficiently support diverse traffic types. In some embodiments, the numerology of OFDM-based signal depends on a bandwidth of the frequency sub-band over which the OFDM-based signals are transmitted. In some embodiments, the OFDM-based signals are filtered OFDM (f-OFDM) signals, and the pulse shaping digital filter used to generate the f-OFDM signals allows the receiver to mitigate interference between adjacent f-OFDM signals upon reception, thereby allowing f-OFDM signals to be communicated over consecutive carriers without relying on a guard band.

An apparatus and digital signal processing means are disclosed to reliably and rapidly receive and detect navigation signals, e.g., Global Navigation Satellite System (GNSS) signals, such as Global Position System (GPS) L1 legacy, L1C, and L5 signals, using combinations of spatially diverse antenna arrays, polarization-diverse antenna arrays, frequency-channelized analysis filters, and perfect-reconstruction synthesis filters, by exploiting features of those signals that are self-coherent over known framing intervals. Among other advantages, the means can reliably and rapidly identify navigation signals based on those features, improve their quality ahead of, or during, signal despreading operations, and detect and excise inadvertent or targeted electronic attack (EA) measures, e.g., navigation signal spoofers, and narrowband or wideband jamming and co-channel interference. In one aspect, the interference excision is performed in an appliqué that can be implemented without coordination with a navigation receiver.

A method for generating a multicarrier signal formed by multicarrier symbols. the method includes: obtaining N first modulating symbols and N second modulating symbols from a sequence of source symbols, the obtaining including, for at least one of the source symbols indexed k, a sub-step of: linearly combining a real part and an imaginary part respectively, of the symbol indexed k with a real part and an imaginary part respectively, of one of the source symbols indexed k+/−R, with R being a non-zero integer, delivering at least one first and one second combined symbol respectively; performing a frequency-time transformation of the N first and N second modulating symbols respectively, delivering a first block and a second block of N carriers respectively; and generating the multicarrier symbol from the first and second blocks of N carriers.

The present disclosure provides a transmitter and a corresponding method. The method includes: pre-processing a signal to be transmitter, the signals being across a plurality of sub-bands; filtering the signal to generate a universal-filtered orthogonal frequency division multiplexing (UF-OFDM) signal, where two or more sub-bands of the plurality of sub-bands are filtered by a common filter; and transmitting the generated UF-OFDM signal.

A method for generating a multicarrier signal formed by multicarrier symbols. the method includes: obtaining N first modulating symbols and N second modulating symbols from a sequence of source symbols, the obtaining including, for at least one of the source symbols indexed k, a sub-step of: linearly combining a real part and an imaginary part respectively, of the symbol indexed k with a real part and an imaginary part respectively, of one of the source symbols indexed k+/R, with R being a non-zero integer, delivering at least one first and one second combined symbol respectively; performing a frequency-time transformation of the N first and N second modulating symbols respectively, delivering a first block and a second block of N carriers respectively; and generating the multicarrier symbol from the first and second blocks of N carriers.

An encoder architecture for UF-OFDM is provided, in which samples are first processed sub-band wise, and then resorted for sub-carrier-wise processing. The sub-carrier processing may comprise separate processing for the two extremity parts of the base band signal corresponding to the transient state of the UF-OFDM data stream and for a core part of the base band signal corresponding to the non-transient state of the UF-OFDM data stream, and then concatenated to obtain a UF-OFDM data stream. In certain embodiments a first extremity part of the base band signal corresponding to the transient state of the UF-OFDM data stream is calculated directly, and the other extremity part inferred from the core part and the first extremity part. The core and extremity part processors may be implemented with filters adapted to multiply each sample by a respective filter coefficient. Modifying these coefficients can introduce a frequency shift or convert the encoder for OFDM encoding.

[Object] To realize IQ imbalance correction in a more preferable aspect.

[Solution] An information processing device including: a calculation unit configured to calculate an error between predetermined reference coordinates on an IQ plane and a signal point of a received predetermined reference signal on a basis of a reception result of the reference signal on which phase modulation or quadrature amplitude modulation is implemented and mapping information of the reference signal; and a generation unit configured to generate correction data for correcting a deviation of a signal point of a received signal on a basis of a calculation result of the error.

A wireless communication device which receives a data signal and a first control signal associated with the data signal from another wireless communication device, the wireless communication device includes a receiver configured to receive, from the another wireless communication device, a series of first frames having a first frame length through a first subband and a series of second frames having a second frame length through a second subband, the second frame length differing from the first frame length, and a processor configured to obtain the first control signal of the first frame through the first subband and the data signal associated with the first control signal of the second frames through the second subband, and specify which of the second frames includes the data signal, based on predetermined information included in the first control signal.