A method for determining a location in a frequency domain, a base station, a computer-readable medium and a system are provided. The method includes determining a subcarrier where a Phase Tracking Reference Signal (PT-RS) is located based on an identification of a DeModulation Reference Signal (DMRS) port associated with the PT-RS. With this method, a subcarrier location where a PT-RS associated with a DMRS port is located can be determined.

Methods, systems, and devices for wireless communications are described. A transmitting device may encode a set of bits to transmit to a receiving device based on a repetition factor. The transmitting device may map, based on the repetition factor, the set of encoded bits to a subset of subcarriers such as adjacent subcarriers of a set of subcarriers. The transmitting device may generate a signal including the set of encoded bits based on the mapping, and transmit the generated signal to the receiving device. The receiving device may receive a modulated signal from the transmitting device, and identify, based on a repetition factor, a subset of subcarriers including adjacent subcarriers of a set of subcarriers associated with the modulated signal. The receiving device may average the subset of subcarriers including the adjacent subcarriers, and demodulate the modulated signal in accordance with the averaged subset of subcarriers including the adjacent subcarriers.

A method and system for demodulating high-order Quadrature Amplitude Modulation (QAM) signals is disclosed. In one embodiment, the system includes a cyclic prefix (CP) removal unit for removing a CP from a received signal to provide a first intermediate signal, wherein the first intermediate signal comprises a plurality of bits; a fast Fourier transform (FFT) unit configured to convert the first intermediate signal into a frequency domain; a soft de-mapper configured to derive a plurality of soft bits based on log-likelihood estimates of the plurality of bits, wherein the soft de-mapper derives each soft bit by using a single linear function to approximate each soft bit; and a decoder configured to decode a signal derived from the soft de-mapper into information.

When processing a signal received wirelessly a gain is applied to a reference signal and the wireless channel over which a received signal passed is estimated using the reference signal with the applied gain. Equalization values obtained from the estimating are adjusted to remove effects of the applied gain. Those adjusted equalization values are then used to equalize at least a data portion of the received signal. The results are stored in a computer readable memory, such as a buffer of a decoder also within the same receiver. Embodiments describe the received signal can be a subframe in which the reference signal is a DMRS or similar that occupies an entire symbol position thereof, as well as a single symbol in which the reference signal is a pilot sequence or pilot samples and the data portion is also within that same single symbol.

When processing a signal received wirelessly a gain is applied to a reference signal and the wireless channel over which a received signal passed is estimated using the reference signal with the applied gain. Equalization values obtained from the estimating are adjusted to remove effects of the applied gain. Those adjusted equalization values are then used to equalize at least a data portion of the received signal. The results are stored in a computer readable memory, such as a buffer of a decoder also within the same receiver. Embodiments describe the received signal can be a subframe in which the reference signal is a DMRS or similar that occupies an entire symbol position thereof, as well as a single symbol in which the reference signal is a pilot sequence or pilot samples and the data portion is also within that same single symbol.

The present invention discloses a signal modulation method, including: demultiplexing an input signal into 2N sub-signals; grouping every two of the 2N sub-signals into a pair; performing filtering on two sub-signals in each pair; performing carrierless amplitude phase (CAP) modulation on the two sub-signals in each pair; modulating the two sub-signals in each pair to a same frequency band, to generate N pairs of CAP signals, where frequency bands of different pairs of sub-signals are different, and a spacing between center frequencies of two neighboring frequency bands is greater than or equal to an average value of baud rates of sub-signals corresponding to the two neighboring frequency bands; and combining the N pairs of CAP signals, and performing electro-optic modulation on a signal obtained after the combining. A signal demodulation method corresponding to the signal modulation method is further disclosed.

A multiple-input multiple output (MIMO) receiver includes circuitry to receive a MIMO transmission through a plurality of antennas over a channel comprising two or more 20 MHz portions of bandwidth. The MIMO transmission comprises a plurality of streams, each transmitted over a corresponding spatial channel and configured for reception by multiple user stations. The MIMO receiver also includes circuitry to simultaneously accumulate signal information within at least two or more of the 20 MHz portions of bandwidth. Each 20 MHz portion comprises a plurality of OFDM subcarriers. The MIMO receiver also includes circuitry to demodulate at least one of the steams using receive beamforming techniques. In this way, multi-user protocol data units can be received.

Disclosed are a data transmitting method, a data receiving method, a network device and a non-transitory computer-readable storage medium. The data transmitting method may include: acquiring first data information and second data information; performing encoding processing on the first data information according to a first resource priority tag to obtain first encoded information, and performing encoding processing on the second data information according to a second resource priority tag to obtain second encoded information; performing signal modulation processing on the first encoded information to obtain first service information, and performing signal modulation processing on the second encoded information to obtain second service information, wherein the first service information comprises the first resource priority tag, and the second service information comprises the second resource priority tag; and transmitting the first service information and the second service information.

Methods of data allocation and signal receiving, a wireless transmitting apparatus, and a wireless receiving apparatus are provided based on orthogonal frequency division multiplexing (OFDM) technology. The wireless transmitting apparatus obtains a data stream and allocates the data stream to a first sub-carrier set. Each of the first sub-carrier set and a second sub-carrier set has sub-carriers with opposite frequencies to each other, respectively. The second sub-carrier is emptied or allocated according the data stream allocated to the first sub-carrier set. The data stream is converted into an OFDM signal transmitted through a transmitting module. The wireless receiving apparatus includes a single branch receiver for receiving a radio frequency (RF) signal and outputting a baseband signal. Subsequently, the data stream is restored from the baseband signal.

A method is provided for individually processing multiple frequency bands in a composite RF signal is disclosed. The composite RF signal is separated into a plurality of gain controlled and bandlimited frequency bands. The gain controlled and bandlimited frequency bands are then recombined to produce a controlled composite RF signal, which is then digitized by undersampling with an ADC to produce a plurality of unambiguous frequency bands convolved around baseband. The sample frequency can be substantially less than the Nyquist Limit of twice the highest frequency present for digitization. Each baseband signal is monitored for amplitude spikes therein. In response to an amplitude spike, the appropriate frequency band is modified by a control signal to hold the ADC to within its dynamic range.