A Radio Frequency (RF) receiver may include a lower-order phase shift keying (PSK) demodulation circuit configured to generate at least one locking parameter when performing a lower-order PSK demodulation of an RF receive signal having an interfering PSK signal component. A higher-order PSK demodulation circuit has a higher order than the lower-order PSK demodulation circuit, and locks to the RF receive signal using the at least one locking parameter from the lower-order PSK demodulation circuit. The higher-order PSK demodulation circuit performs the higher-order PSK demodulation of the RF receive signal based upon locking to the RF receive signal to determine the interfering PSK signal component.

In a broadband wireless communication system, a spread spectrum signal is intentionally overlapped with an OFDM signal, in a time domain, a frequency domain, or both. The OFDM signal, which inherently has a high spectral efficiency, is used for carrying broadband data or control information. The spread spectrum signal, which is designed to have a high spread gain for overcoming severe interference, is used for facilitating system functions such as initial random access, channel probing, or short messaging. Methods and techniques are devised to ensure that the mutual interference between the overlapped signals is minimized to have insignificant impact on either signal and that both signals are detectable with expected performance by a receiver.

A communication device includes a receiver, a transmitter and a control circuit. The receiver is configured to receive, from an infrastructure equipment of a mobile communications network, downlink signals on a downlink via a wireless access interface of the mobile communications network. The transmitter is configured to transmit, to the infrastructure equipment, uplink signals on an uplink via the wireless access interface. The control circuit is configured to control the receiver to receive the downlink signals and control the transmitter to transmit the uplink signals. The control circuit is further configured to delay a reception period for the receiver to receive the downlink signals after a transmission period in which the transmitter transmits the uplink signals when a duration of the transmission period exceeds a predetermined threshold.

According to some embodiments, a method of performing a Hybrid Automatic Repeat Request (HARQ) process comprises receiving, by a wireless device executing a HARQ process, a first transport block encoded according to a category type of the wireless device and a first modulation coding scheme; decoding, by the HARQ process, the first transport block using a number of soft bits N; receiving, by the wireless network element, a second transport block encoded according to the equipment type and a second modulation coding scheme different from the first modulation coding scheme; and decoding, by the HARQ process, the second transport block using the number of soft bits N.

A method for adaptively adjusting a modulation coding scheme and a reference signal pattern. The method includes: determining a Modulation Coding and Reference Signal Pattern Scheme (MCPS) index according to channel status information, the MCPS being used for indicating a reference signal pattern, a modulation scheme and/or a modulation order and TBS; performing communication according to the reference signal pattern, modulation scheme and/or modulation order and TBS corresponding to the MCPS index. Another example of the present disclosure further provides a corresponding eNB, terminal and system. With examples of the present disclosure, the reference signal pattern and modulation coding scheme may be adaptively and jointly adjusted according to requirements to obtain the optimal transmission efficiency.

Spatial Multiplexing (SM) with Multiple Input Multiple Output (MIMO) is used in many wireless communication systems for providing high data rate in a given channel bandwidth. When SM-MIMO is used for sharing the same resources for multiple users (MU-SM), the control information describing the parameters of MU-SM need to be sent separately to all the users that may be sharing the same resources. The base station in a wireless communication system may only provide the parameters required by each specific client terminal for decoding the data addressed to it. A method and apparatus are disclosed that enable improved decoding of MU-SM signals in scenarios where information about the parameters of other transmissions on the same resources or absence of any transmission other than the one intended for the subject client terminal is not available.

An electronic device includes an antenna configured to receive a wireless signal. The electronic device also includes a first correlator configured to correlate the wireless signal to a communication of a first wireless protocol type and a second correlator configured to correlate the wireless signal to a communication of a second wireless protocol type.

Apparatus and methods for identifying a wireless signal-emitting device are disclosed. The apparatus is configured to sense and measure wireless communication signals from signal-emitting devices in a spectrum. The apparatus is operable to automatically detect a signal of interest from the wireless signal-emitting device and create a signal profile of the signal of interest; compare the signal profile with stored device signal profiles for identification of the wireless signal-emitting device; and calculate signal degradation data for the signal of interest based on information associated with the signal of interest in a static database including noise figure parameters of a wireless signal-emitting device outputting the signal of interest. The signal profile of the signal of interest, profile comparison result, and signal degradation data are stored in the apparatus.

A multi-carrier cellular wireless network (400) employs base stations (404) that transmit two different groups of pilot subcarriers: (1) cell-specific pilot subcarriers, which are used by a receiver to extract information unique to each individual cell (402), and (2) common pilots subcarriers, which are designed to possess a set of characteristics common to all the base stations (404) of the system. The design criteria and transmission formats of the cell-specific and common pilot subcarriers are specified to enable a receiver to perform different system functions. The methods and processes can be extended to other systems, such as those with multiple antennas in an individual sector and those where some subcarriers bear common network/system information.

To process received wireless signals received in a receiver, a noise and interference estimate is generated by subtracting the serving cell component from the received OFDM signal, a normalized noise signal is produced by whitening the noise and interference estimate, interference information is detected from the normalized noise signal associated with corresponding reliability information indicating reliability of the interference information, interference cancellation is performed based on the interference information, and a performance indicator indicative of an accuracy of the interference cancellation is adaptively adjusted using the reliability information.