Embodiments of the present disclosure provide a method, device, and computer readable medium for channel equalization. The method comprises receiving, at a first device, a first signal from a second device via a plurality of subcarriers over a communication channel; sampling the first signal to obtain sampled symbols; and generating a second signal based on the obtained sampled symbols using a direct association between sampled symbols and payloads, the second signal indicating a payload of the first signal carried on an effective subcarrier of the plurality of subcarriers. Through the use of the direct association between sampled symbols and payloads, it is possible to achieve channel equalization in a less complicated, more reliable, and cost-effective manner, so as to extract the payload in the received signal.

According to some embodiments, a method performed by a wireless device comprises receiving a wireless signal R.sub.k over all subcarriers allocated to the wireless device. The signal R.sub.k comprises a phase tracking reference signal (PT-RS) on a subset of subcarriers allocated to the wireless device and the subset comprises at least one non-contiguous subcarrier. The method further comprises computing a de-inter-carrier interference (ICI) filter based on the PT-RS and a channel estimate using a convolutional matrix C.sub.R of the received signal R.sub.k and applying the de-ICI filter to the received signal R.sub.k to generate a de-ICI filtered signal.

Embodiments of this application provide a method for sending carrier information, and the method includes: performing, by a base station, subcarrier mapping on a first carrier in a first subcarrier mapping manner, where subcarriers corresponding to the first subcarrier mapping manner have frequency offset of a first offset value relative to subcarriers corresponding to a second subcarrier mapping manner, and the subcarriers corresponding to the second subcarrier mapping manner are symmetric with respect to a carrier center frequency of the first carrier, and include no subcarrier on the carrier center frequency of the first carrier; and sending, by the base station, indication information to a terminal, where the indication information carries information about the first offset value.

Methods, systems, and devices for wireless communications are described that support noise tracking within transmission time intervals (TTIs) in wireless communications. A transmitting user equipment (UE) in direct communications with a receiving UE may transmit one or more reference signals that allow the receiving UE to estimate noise during different portions of a TTI and compensate for varying noise levels within the TTI. The transmitting UE may identify different sets of symbols within the TTI that are expected to have different noise levels, and may transmit one or more reference signals that allow for noise estimation at the receiving UE for each of the different sets of symbols.

A system and method for transmitting an orthogonal frequency-division multiplexed signal with a group distributed phase tracking reference signal subcarrier structure, and for estimating, and compensating for, both common phase error, and inter-carrier interference.

A system of multiple concurrent receivers is described to process multiple narrow bandwidth wireless signals with arbitrary bandwidth and center frequency separation. These multiple receivers may provide a downconverted signal at the baseband frequency to process signal bandwidth using the lowest power consumption while using fully modular signal processing blocks operating at the low frequency. The concurrent receivers may operate from a single high frequency amplifier and may be derived from a low impedance point to reduce loading and improve scalability. The center frequency and bandwidth of each of the channels as well as phases of each of the channels may be independently reconfigured to achieve scalability, and on-chip test and calibration capability.

A system that incorporates aspects of the subject disclosure may perform operations including, for example, receiving, via an antenna, a signal generated by a communication device, detecting passive intermodulation interference in the signal, the interference generated by one or more transmitters unassociated with the communication device, and the interference determined from signal characteristics associated with a signaling protocol used by the one or more transmitters. Other embodiments are disclosed.

Adjacent channel leakage-power ratio (ACLR) can be reduced at a transmitter of a device. A modulated signal can be mapped into a plurality of tone sets in a frequency domain, wherein the plurality of tone sets include a first, a second, and a third set of tones. The first and the third set of tones can be converted in the frequency domain to a fourth and a fifth set of tones, respectively, in a time domain. A zero padding of one or more symbols associated with the fourth and the fifth set of tones can be performed to output a sixth and a seventh set of tones, respectively. The sixth and the seventh set of tones can be converted to an eighth and a ninth set of tones, respectively, in the frequency domain. The eighth and the ninth set of tones can be processed for transmitting to another wireless device.

An optical receiver circuit is disclosed, including a photodiode, an output terminal, a first amplifier stage, and an electrostatic discharge (ESD) protection circuit. The photodiode may generate a receiver current based on received optical signals. The first amplifier stage may be coupled between the photodiode and the output terminal and include a first inductor coupled between the photodiode and an input of a first inverter, and a second inductor coupled between the input of the first inverter and a first resistor. The first resistor may be coupled between the second inductor and an output of the first inverter. ESD protection circuit may be coupled to the input of the first inverter. The output terminal may generate an output signal based at least in part on the output of the first inverter.

A method for generating a multicarrier signal formed by a temporal succession of multicarrier symbols, implementing the following steps for generating at least one block of multicarrier symbols: coding a set of information elements delivering a set of coded elements; puncturing a first sub-set of coded elements of the set of coded elements, according to a first puncturing pattern, delivering a first sub-set of punctured coded elements; puncturing a second sub-set of coded elements of the set of coded elements, complementary to the first sub-set, according to a second puncturing pattern, delivering a second sub-set of punctured coded elements; mapping, onto at least one complex symbol, of the punctured coded elements of the first and second sub-sets of punctured coded elements; and generating the block of multicarrier symbols from said at least one complex symbol.