摘要:
In a transmitter, an assignment circuit maps a phase tracking reference signal (PT-RS) onto a subcarrier, and a transmitting circuit transmits a signal containing the phase tracking reference signal. The phase tracking reference signal is mapped onto a different subcarrier for each cell, group, or mobile station.
摘要:
In a MIMO communications system (199) a first communications device (100) applies beamforming to a complete transmission packet including both synchronization data and either payload data or training symbols. A second communications device (200) evaluates the beamformed synchronization data and determines and transmits a feedback information indicating the minimum required synchronization data and/or a minimum number of training symbols. The first communications device (100) tailors the synchronization data and/or number of training symbols on the basis of the feedback information (s11). Beamforming the complete transmission packet facilitates also signal suppression at defined locations. When the channel properties change, the second communications device (200) may provide further channel state information to adapt beamforming in the first communications device (100) without transmission of not beamformed training symbols. The communications system may be a powerline telecommunications system.
摘要:
A periodic phase modulation, having a period shorter than a symbol period, is applied as a source modulation, in addition to a symbol modulation, to signals transmitted between a transmitter and a receiver in a communication network. Symbol value elements can be sent from multiple transmitters (203, 303, 603, 703) to a receiver (607, 207) in the same symbol period can be processed on the basis of the source modulation without destructive interference. In some embodiments, the symbol value elements sent by different transmitters can be combined in the receiver. In some embodiments, symbol value elements sent by different transmitters can be distinguished in the receiver.
摘要:
Apparatuses and methods for avoiding interference between wireless systems are described herein. One embodiment of the disclosure provides an apparatus for avoiding interference between at least one transmitter and at least one receiver within at least one wireless device. The apparatus comprises a first processing circuit configured to determine whether one or more bins are affected by interference from a transmitter based on predetermined information. The apparatus further comprises a second processing circuit configured to mitigate the interference from the transmitter by at least one of the transmitter and a receiver if it is determined that the one or more bins are affected
摘要:
A method for transmitting a multicarrier signal over frequency resource, wherein said frequency resource is divided into a plurality of resource blocks, said resource block comprises of a number of subcarriers that are equally spaced by a subcarrier spacing, said number of subcarriers or said subcarrier spacing is configurable per said resource block or per a contiguous set of resource blocks, said subcarrier spacing d n is 2 n times the smallest configurable subcarrier spacing with non-negative integer n, and subcarrier center frequencies of subcarrier spacing d n and subcarrier center frequencies of subcarrier spacing d n+1 are shifted by integer multiples of d n .
摘要:
A method of transmitting a multicast signal and a unicast signal simultaneously for a network of a wireless communication system comprises transmitting the multicast signal to at least one first communication device in the wireless communication system during a time interval via at least one first antenna of the network; transmitting the unicast signal to another communication device in the wireless communication system during the time interval via at least one second antenna of the network; and reducing interference caused by at least one of the multicast signal and the unicast signal, when transmitting the multicast signal and the unicast signal.
摘要:
A periodic phase modulation, having a period shorter than a symbol period, is applied as a source modulation, in addition to a symbol modulation, to signals transmitted between a transmitter and a receiver in a communication network. Symbol value elements can be sent from multiple transmitters (203, 303, 603, 703) to a receiver (607, 207) in the same symbol period can be processed on the basis of the source modulation without destructive interference. In some embodiments, the symbol value elements sent by different transmitters can be combined in the receiver. In some embodiments, symbol value elements sent by different transmitters can be distinguished in the receiver.
摘要:
A data communication method which is implemented by a communication system, the method comprising: transmitting data by a base station using an OFDM, Orthogonal Frequency Division Multiplexing method, as a downlink access method; transmitting, by a mobile terminal, a quality notification signal for notifying downlink communication quality to said base station; transmitting, by said mobile terminal, a scheduling request signal to said base station requesting allocation of radio resources from said base station before transmitting transmission data to said base station; and performing, by said mobile terminal: a quality notification process of transmitting said quality notification signal to said base station; a scheduling request signal transmission process of transmitting said scheduling request signal to said base station; and a control process of, when a processing timing of said quality notification process coincides with that of said scheduling request signal transmission process, stopping said quality notification process during a time interval during which said mobile terminal transmits said scheduling request signal. A related system and mobile terminal are disclosed.