The present invention concerns a method and device for transferring, by an emitter, a flow of samples to a receiver through a wireless interface using Single-Carrier Frequency Division Multiple Access. The emitter: —selects consecutive blocks of M samples of the flow of samples, —modulates each selected block, —selects, for each modulated block, half of the modulated block located in the center of the modulated block, —selects, with a M/2 sample shift, consecutive blocks of M samples, —modulates each selected block with the shift, —selects, for each modulated block with the shift, half of the modulated block with the shift located in the center of the modulated block with the shift, —forms a stream composed of one in two half ordered modulated blocks and, between two half ordered modulated blocks, one half ordered modulated block with the shift, —transfers the formed stream.

A receiver is configured to capture a plurality of linearly distorted OFDM symbols transmitted over a signal path. The receiver forms the captured OFDM symbols into an overlapped compound data block that includes payload data and at least one pseudo-extension, processes the overlapped compound block with circular convolution in the time domain using an inverse channel response, or frequency domain equalization, to produce an equalized compound block, and discards end portions of the equalized block to produce a narrow equalized block. The end portion corresponds with the pseudo-extension, and the narrow block corresponds with the payload data. The receiver cascades multiple narrow equalized blocks to form a de-ghosted signal stream of OFDM symbols. The OFDM symbols may be OFDM or OFDMA, and may or may not include a cyclic prefix, which will have a different length from the pseudo-extension.

A communications device includes receiver circuitry, transmitter circuitry, and controller circuitry controlling the transmitter circuitry and the receiver circuitry to receive data in accordance with an automatic repeat request (ARQ) type protocol in which the data is received as a plurality of encoded data packets encoded with an error correction code and the transmitter circuitry transmits a feedback signal depending on whether each of the data encoded packets is estimated as having been decoded successfully by the receiver circuitry. The controller circuitry is configured to evaluate a quality measure of each encoded data packet and in response to the evaluated quality measure to transmit an early indication of the feedback signal to the wireless communications network, before the encoded data packet has been decoded by the error correction decoder.

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 filter length of a filter for limiting a width of a guard band in a frequency band to be used in the radio communication is transmitted to an external apparatus through the radio communication. The filter length is determined in accordance with at least one of a frequency resource and a time resource for the radio communication. The apparatus enables a filter improving frequency use efficiency.

The present disclosure relates to an apparatus and method of processing a digital signal, wherein an input signal is transformed into the frequency domain by applying a fast Fourier transformation (FFT) processing to obtain a transformed input signal. Positive and negative frequency components of the transformed input signal are separated and respective ones of the separated positive and negative frequency components are separately processed by respective digital filtering to obtain filtered frequency components. The filtered frequency components are combined in the frequency domain using a down-sampling operation for down-sampling the filtered frequency components from an input number of samples per symbol to a different output number of samples per symbol, and the combined output components are converted into the time domain by applying an IFFT processing.

A method and apparatus for processing or generating a high-frequency signal using parallel and undersampled baseband signal processing in the frequency domain.

A method of modulating a series of input digital symbols of a first modulation scheme is provided. The method is implemented by a transmitter and includes receiving a sequential series of samples of the digital symbols in a first domain of the first modulation scheme. The first domain is one of the time domain and the frequency domain. The method further includes determining a dual of the first modulation scheme. The dual has a second modulation scheme in a second domain that is different from the first domain the second domain is the other of the time domain and the frequency domain. The method further includes applying a 90 degree rotational operation to the second modulation scheme to generate a rotational modulation format, modulating the series of digital symbols with the generated rotational modulation format, and outputting the modulated series of digital symbols to a receiver.

An electrical system includes a transceiver with an IQ estimator and an IQ mismatch corrector. The electrical system also includes an antenna coupled to the transceiver. The IQ estimator is configured to perform frequency-domain IQ mismatch analysis to determine an IQ mismatch estimate at available frequency bins of a baseband data signal. The IQ mismatch corrector is configured to correct the baseband data signal based on the IQ mismatch estimate.

The embodiments described herein provide for a method and system for implementing a multi-tap hybrid-equalization technique devoid of ISI jitter and PSI jitter in the high-speed data path to achieve 24 Gbps operating speed in systems utilizing GDDR6 DRAM. The method includes receiving an original data signal at a first TFFE circuit and receiving an altered data signal at a second TFFE circuit. The method further comprises generating a time-domain-equalized original data signal using a set of TFFE coefficients from the original data signal. The method further comprises generating a time-domain-equalized altered data signal using the set of TFFE coefficients from the altered data signal. The method further comprises generating, a time-and-voltage-domain-equalized data signal from the time-domain-equalized original data signal and the time-domain-equalized altered data signal at a voltage-feed forward equalization (VFFE) circuit using a set of VFFE coefficients.

A receiver includes a first data slicer circuit and a radio interference detector circuitry. The first data slicer circuit is configured to generate a second data signal according to a first data signal. The radio interference detector circuitry is configured to generate first estimated information according to the first data signal, to generate second estimated information according to the second data signal, to generate third estimated information according to the first data signal and the second data signal, and to detect a radio interference signal according to the first estimated information, the second estimated information, and the third estimated information.