Disclosed is a receiver circuit comprising an analog-to-digital converter (ADC) circuit having an analog input, a clock input, and a digital output, and a clock divider circuit having a reference clock input and a phase selector input, and having a clock output coupled to the clock input of the ADC circuit. The clock divider circuit is configured to divide a reference clock signal coupled to the reference clock input at a reference clock frequency, to produce a clock output signal at an ADC clock frequency, at the clock output, such that the reference clock frequency is an integer multiple N of the ADC clock frequency. The clock divider circuit is further configured to select from among a plurality of selectable phases of the clock output signal, responsive to a phase selector signal applied to the phase selector input.

A symbol synchronization method is provided according to an embodiment of the disclosure. The method includes: receiving an input signal which includes a plurality of symbols; performing a cross-correlation operation on a plurality of first samples of the input signal according to a known sequence of a first type symbol among the symbols to obtain a plurality of cross-correlation results; accumulating the cross-correlation results to obtain an ending position of the first type symbol; delaying a plurality of second samples of the input signal according to a length of a second type symbol among the symbols to perform an auto-correlation operation; and correcting the ending position according to an operation result of the auto-correlation operation. In addition, a corresponding signal receiving circuit is provided according to an embodiment of the disclosure.

Disclosed is a receiver circuit comprising an analog-to-digital converter (ADC) circuit having an analog input, a clock input, and a digital output, and a clock divider circuit having a reference clock input and a phase selector input, and having a clock output coupled to the clock input of the ADC circuit. The clock divider circuit is configured to divide a reference clock signal coupled to the reference clock input at a reference clock frequency, to produce a clock output signal at an ADC clock frequency, at the clock output, such that the reference clock frequency is an integer multiple N of the ADC clock frequency. The clock divider circuit is further configured to select from among a plurality of selectable phases of the clock output signal, responsive to a phase selector signal applied to the phase selector input.

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may be in communication with multiple base stations having a non-ideal backhaul link, where uplink and downlink transmission on a carrier may be sent on respective communication links. The transmissions may be synchronous or asynchronous, and the UE may identify a set of search candidates in overlapping TTIs associated with downlink transmissions from respective base stations. In some cases, a number or a timing of the set of search candidates may be based on the overlapping TTIs. The UE may also use different uplink transmit powers for transmissions on the different communication links. In some cases, a minimum reserved power may be used for each link where a remaining transmit power, for example, up to a maximum total transmit power, may be split between the links or applied to the uplink transmission that occurs temporally first.

A symbol synchronization method is provided according to an embodiment of the disclosure. The method includes: receiving an input signal which includes a plurality of symbols; performing a cross-correlation operation on a plurality of first samples of the input signal according to a known sequence of a first type symbol among the symbols to obtain a plurality of cross-correlation results; accumulating the cross-correlation results to obtain an ending position of the first type symbol; delaying a plurality of second samples of the input signal according to a length of a second type symbol among the symbols to perform an auto-correlation operation; and correcting the ending position according to an operation result of the auto-correlation operation. In addition, a corresponding signal receiving circuit is provided according to an embodiment of the disclosure.

The present invention generally relates to the field of electrical communication and more specifically to apparatuses and methods of phase noise mitigation for signal transmission in wideband telecommunication systems. The method for compensation of the phase noise effect on the data transmission through a radio channel is based on a possibility to present the phase noise of a reference oscillator like a random process where the main spectral density is concentrated in the low-frequency region. Therefore, the number of estimated parameters can be reduced many times to several low-frequency spectral components instead of a direct estimation in the time domain. The advantage of the method is an improvement of the estimation accuracy and a reduction of the computational complexity.

The present disclosure relates to a pre-5.sup.th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4.sup.th-Generation (4G) communication system such as Long Term Evolution (LTE). According to various embodiments of the disclosure, an apparatus of a terminal in a wireless communication system is provided. The apparatus includes at least one transceiver, and at least one processor configured to be operatively connected to the at least one transceiver, wherein the at least one processor may be configured to: obtain first synchronization of a first carrier that is in synchronization, determine second synchronization of a second carrier that is out of synchronization based on the first synchronization, and perform communication based on the second synchronization.

The present invention generally relates to the field of electrical communication and more specifically to apparatuses and methods of phase noise mitigation for signal transmission in wideband telecommunication systems.

The method for compensation of the phase noise effect on the data transmission through a radio channel is based on a possibility to present the phase noise of a reference oscillator like a random process where the main spectral density is concentrated in the low-frequency region. Therefore, the number of estimated parameters can be reduced many times to several low-frequency spectral components instead of a direct estimation in the time domain.

The advantage of the method is an improvement of the estimation accuracy and a reduction of the computational complexity.

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may be in communication with multiple base stations having a non-ideal backhaul link, where uplink and downlink transmission on a carrier may be sent on respective communication links. The transmissions may be synchronous or asynchronous, and the UE may identify a set of search candidates in overlapping TTIs associated with downlink transmissions from respective base stations. In some cases, a number or a timing of the set of search candidates may be based on the overlapping TTIs. The UE may also use different uplink transmit powers for transmissions on the different communication links. In some cases, a minimum reserved power may be used for each link where a remaining transmit power, for example, up to a maximum total transmit power, may be split between the links or applied to the uplink transmission that occurs temporally first.

Physical layer processing methods for network acquisition by remote nodes in wireless communication systems are described herein. New methods for wireless network discovery and synchronization by remote nodes are described herein that utilize spatial (e.g., antenna array) processing algorithms which may achieve enhanced functioning in challenging radio frequency environments, such as those containing interference and multipath distortion effects. These methods may include advantageous use of spatial whiteners and associated pluralities of adaptive beamformers to detect network reference and synchronization signals and estimate their parameters.