The disclosure generally relates to a method and apparatus for frequency interleaving. Specifically, an embodiment of the disclosure relates to a communication system having one or more antennas, a radio, a memory circuit, and a processor circuit. The antennas can be used to communicate signals or to comply with different transmission protocols. The radio can be configured to send and receive radio signals. The memory can communicate with the processor circuit and contain instructions for the processor circuit to write data carriers along a plurality of rows and columns of a 2-D store in bit-reversed order and read the columns of 2-D store.

A device performs operations on a plurality of streams of data. The device includes a frequency domain converter logic that transforms input signal samples of radio frequency (RF) signal impulse response data to frequency domain signal results. A first arbiter has a plurality of inputs. Each input from the plurality of inputs receives one stream of data from a plurality of streams of data. Each stream of data in the plurality of streams of data includes a stream of RF signal impulse response data. For each arbitration cycle, the first arbiter selects an input signal sample from one of the plurality of inputs to forward to the frequency domain converter logic. Multi-stream first-in-first-out (FIFO) memory that has a separate FIFO buffer for each stream of data in the plurality of streams of data. For each input signal sample transformed by the frequency domain converter logic into a frequency domain signal result, the frequency domain converter logic places the frequency domain signal result into a FIFO buffer of the multi-stream FIFO memory that corresponds to a memory stream from which the input signal sample originated.

An array-based Compressed sensing Receiver Architecture (ACRA) includes an antenna array with two or more antennas connected to two or more ADCs that are clocked at two or more different sampling rates below the Nyquist rate of the incident signals. Comparison of the individual aliased outputs of the ADCs allows for estimation of signal component characteristics, including signal bandwidth, center frequency, and direction-of-arrival (DoA). Multiple digital signal processing (DSP) techniques, such as sparse fast Fourier transform (sFFT), can be employed depending on the type of detection or estimation.

Frame formatting for communications within single user, multiple user, multiple access, and/or MIMO wireless communications. A signal is processed within a communication device using at least two respective downclocking ratios (e.g., a first downclocking ratio applied to a first portion of the signal such as a frame or packet extracted there from, a second downclocking ratio applied to a second portion of the signal). Alternatively, a signal is divided into more than two respective portions, and different respective downclocking ratios are applied to those different respective portions (e.g., a first downclocking ratio applied to a first portion of the signal, and so on up to an n-th downclocking ratio applied to an n-th portion of the signal). Some implementations apply a singular or common downclocking ratio to more than one portion of the signal (which may be contiguous/adjacent or non-contiguous/non-adjacent within the signal).

Methods and systems are provided that enable an OFDM transmitter to be used for transmitting conventional OFDM or a form of transformed OFDM. A technique is provided for transforming a coded and modulated sequence of samples prior to an IFFT that enables the transformed sequence of samples to be transmitted using conventional OFDM or transformed OFDM. The selection of a transform function for transforming the coded and modulated sequence of samples may be based on optimizing the transform function for particular operating conditions between the transmitter and receiver. In some embodiments of the invention OFDM and time transformed OFDM are multiplexed in time and/or frequency in a transmission frame. In some embodiments of the invention a pilot pattern is provided in which the pilot are sent using OFDM and data is sent using OFDM and/or transformed OFDM.

An orthogonal frequency division multiplexing (OFDM) transmission system is provided which includes a data processing unit which generates a transmission signal using a plurality of tones including a reserved tone, a storage unit which stores Peak Reduction Kernel information according to the type of data symbol, and a compensation unit which retrieves the Peak Reduction Kernel information according to the type of data symbol from the storage unit and causes the retrieved information to be carried by the reserved tone included in the transmission signal. Therefore, a Peak-to-Average Power Ratio (PAPR) can be efficiently compensated.

A system and method for 5G new radio (NR) low-density low density parity check (LDPC) decoding comprising performing a Fast Fourier Transform using a Fast Fourier Transform algorithm. The system and method determines if a reference sequence is present and performing a channel estimate and a channel interpolate for the channel estimate if the reference sequence is present. The system and method demodulates at least one orthogonal frequency division multiplexing (OFDM) symbol according to r.sub.bin*conj(H.sub.bin)/(norm(H.sub.bin).sup.2+Noise_Power). The system and method decodes the demodulated at least one orthogonal frequency division multiplexing symbol, and determines if the decoded at least one orthogonal frequency division multiplexing symbol is correct.

An orthogonal frequency division multiplexing (OFDM) transmission system is provided which includes a data processing unit which generates a transmission signal using a plurality of tones including a reserved tone, a storage unit which stores Peak Reduction Kernel information according to the type of data symbol, and a compensation unit which retrieves the Peak Reduction Kernel information according to the type of data symbol from the storage unit and causes the retrieved information to be carried by the reserved tone included in the transmission signal. Therefore, a Peak-to-Average Power Ratio (PAPR) can be efficiently compensated.

A method for adaptively-tuned digital self-interference cancellation includes generating a digital self-interference cancellation signal from a digital transmit signal based on a transform configuration; combining the digital self-interference cancellation signal with a receive signal to form a digital residue signal; generating a composite residue signal from the digital residue signal and the digital transmit signal; and updating the transform configuration based on the composite residue signal.

Disclosed herein is a broadcast signal receiver. The broadcast signal receiver according to an embodiment of the present invention includes a synchronization and demodulation module configured to perform detection and OFDM demodulation on a received broadcast signal, a frame parsing and deinterleaving module configured to parse and deinterleave the signal frame of the broadcast signal, a demapping and decoding module configured to convert the data of at least one Physical Layer Pipe (PLP) of the broadcast signal into a bit domain and to FEC-decode the PLP data, and an output processing module configured to receive the data of the at least one PLP and to output the received data in a data stream form.