Provided is a communication control device including a wireless communication unit configured to communicate wirelessly with a terminal in a macrocell that is allowed to communicate wirelessly in FDD mode using a frequency band, the macrocell being overlapped in part or in whole with a small cell that is allowed to communicate wirelessly in TDD mode using the frequency band, an acquisition unit configured to acquire a measurement result during handover of a terminal, the handover allowing the terminal to communicate wirelessly in the small cell, the measurement result being obtained by measuring a degree of interference between the terminal and one or more other terminals that communicate wirelessly in the macrocell, and a controller configured to control the handover based on the measurement result.

Provided is a terminal device configured to communicate with a base station device. The device includes a transmission unit that, upon transmission of a PRACH in a primary cell in a subframe i.sub.1 of a first CG (transmission of a first PRACH) overlapping transmission of a PRACH in a subframe i.sub.2 of a second CG (transmission of a second PRACH) and the first PRACH being ready to be transmitted in a subframe at least one before the subframe i.sub.1, transmits the first PRACH.

A method, apparatus and receiver for detecting intermodulation distortion (IMD) affecting a received signal in a wireless receiver are provided. One method includes determining a measurement indicative of IMD based on at least one transmit signal. When the measurement indicative of IMD exceeds a first pre-determined level, at least one sample of an amplitude of a signal output by the wireless receiver is collected in a first data set. When the measurement indicative of intermodulation distortion does not exceed a second pre-determined level, the second predetermined level being less than the first predetermined level, at least one sample of an amplitude of the signal output by the wireless receiver is collected in a second data set. A comparison is performed based on data of the first data set and on data of the second data set to determine a measure of IMD.

Network planning based on collected crowd-sourced access point quality and selection data can optimize access point frequency and/or bandwidth selection. A cloud-based application can be utilized in conjunction with a mobile device to build a database of access point quality and thresholds suitable for real-time and other jitter-sensitive services. The mobile device jitter measurements and selection thresholds can be collected at a cloud platform, which creates an access point performance and selection threshold profile from which the network can facilitate access point frequency and/or bandwidth selections.

A system and method involve receiving, at a processor, a phase modulated signal such as an optical or electromagnetic signal, using one or more samples of an in-phase component I(t) and a quadrature component Q(t) of the received phase modulated signal to generate, at the processor, a processed signal using the equation [A−B×I(t)]×Q(t), where A and B are numerical parameters, and inputting the processed signal into a receiver operatively connected to the processor. The processed signal may be filtered prior to being input into the receiver. Parameters A and B may be selected to vary complexity and performance of the receiver while controlling distortion for different modulation indices.

Method for allocating resources (44) within a grid (40) of time and frequency for communication in a radio communications system under a first protocol, comprising determining an indication of a frequency resource range (43) to be allocated for data communication between a base station and a device within the first radio protocol; determining that a predetermined frequency resource (42) within said range is pre-allocated to communication under a second radio protocol; allocating a frequency resource (44) for the communication in the first radio protocol which overlaps and excludes said predetermined frequency resource for that data communication.

A method that incorporates aspects of the subject disclosure may include, for example, receiving digital data via a plurality of fiber optic cables, wherein the digital data represents a plurality of radio frequency signals received at a plurality of remote radio units via a plurality of uplink paths, wherein the first virtual processing system is configured to mitigate interference detected in one or more of the plurality of uplink paths, performing a plurality of measurements of the digital data to identify an interference condition associated with at least a portion of the plurality of uplink paths associated with the plurality of remote radio units; and providing updated digital data, according to the interference condition that is identified, to a second virtual processing system including at least one second virtual processor, wherein the second virtual processing system is configured to operate as one or more baseband units for providing cellular communication services. Other embodiments are disclosed.

The present invention provides a data interference cancellation method, a transmit end, a receive end, and a system. The method includes allocating, by a transmit end, a corresponding downlink transmission resource to each transmission group, where at least one transmission group includes at least two transmit antennas and separately sending, by the transmit end, downlink data on the downlink transmission resource corresponding to each transmission group.

The present application discloses a method of and apparatus for interference measurement in coordinated multipoint transmission so as to enable a user equipment to report corresponding channel state information accurately with respect to different interference sources. In the method according to an embodiment of the invention, the network side configures a user equipment with a plurality of sets of REs for interference measurement with respect to different interference sources and instructs the user equipment to select a set of REs for interference measurement adapted to an actual application environment to perform interference measurement, and as such in CoMP transmission, the user equipment can report channel state information with respect to the different interference sources accurately according to a network environment, so that the network side can gain timely knowledge of a change in network environment, thus accommodating a demand of CoMP transmission and further improving the performance of the system.

Provided are a method and apparatus for a UE (user equipment) to provide reference signal feedback in a wireless communication system. The method includes: receiving, from a base station, CSI-RS configuration information for configuring CSI-RS (channel state information reference signal) patterns, the CSI-RS configuration information containing usage information; performing a first measurement for radio resource management on all CSI-RS patterns configured based on the CSI-RS configuration information; and performing a second measurement only on CSI-RS patterns corresponding to the usage information, the second measurement being determined by the usage indicated by the usage information.