Abstract:
Techniques are described that provide for waveform selection for uplink (UL) and/or downlink (DL) wireless transmissions based on one or more factors associated with the wireless transmission, a transmitter that is to transmit the wireless transmission, or combinations thereof. UL and DL transmissions may use one of a number of different waveforms, such as single-carrier waveforms that use a single carrier for information transmission of a wireless channel, and multi-carrier waveforms that use multiple carriers at different frequencies to transmit some of the bits on each channel. Multi-carrier transmission waveforms or single-carrier waveforms may be selected for wireless transmissions based on a bandwidth allocated for the transmissions, a capability of a transmitter that is to transmit the transmissions, or combinations thereof.
Abstract:
Die Erfindung betrifft ein Verfahren zur automatischen Klassifikation des Modulationsformats eines digital modulierten Signals, welches die empfangenen I/Q-Datenpunkte zuerst für jedes Modulationsformat mittels eines Clustering-Verfahrens ausgewertet, wobei nach Durchführung des Clustering-Verfahrens für jedes der Modulationsformate jeweils alle I/Q-Datenpunkte jeweils einem ermittelten Cluster-Schwerpunkt zugeordnet sind. Danach wird für jedes Modulationsformat jeweils der Wert einer Nutzenfunktion bestimmt, welche einen umso höheren (niedrigeren) Wert annimmt, je besser die einem Cluster-Schwerpunkt zugeordneten I/Q-Datenpunkte durch den Cluster-Schwerpunkt abgedeckt sind und je geringer die euklidischen Abstände der ermittelten Custer-Schwerpunkte von dem zugeordneten Konstellationspunkt sind. Es wird dann dasjenige Modulationsformat als das für das digital modulierte Signal zutreffende Modulationsformat angenommen, für welche die Nutzenfunktion den höchsten (niedrigsten) Wert annimmt.
Abstract:
The present disclosure pertains to a method for operating a network node (100) for a wireless communication network. The method comprising determining and/or adjusting a modulation, and/or a number of symbols Q' used for modulation, for HARQ/ACK transmission by a terminal (10) based on a number of DL carriers configured for the terminal (10). The method further comprises configuring the terminal (10) with the determined and/or adjusted modulation. There are also discussed related methods and devices.
Abstract:
Methods, systems, and devices are described for eliminating interference from a convoluted signal comprising several signals of different radio access technologies (RATs), such as a Long Term Evolution (LTE) signal and wireless local area network (WLAN) signal, in an unlicensed or shared radio frequency spectrum band are described. In accordance with the present disclosure, a dual-radio mobile device may utilize a multiple radios to assist in the operation of interference cancellation. Specifically, in some examples, a first radio (e.g., WLAN radio) may process the received convoluted signal to reconstruct a first signal (e.g., WLAN signal). The reconstructed first signal may be utilized by a second radio (e.g., LTE radio) to identify a second signal (e.g., LTE signal) in the received convoluted signal by cancelling or removing the reconstructed first signal from the convoluted signal.
Abstract:
This disclosure describes systems, and methods related to signal classification in a wireless communication network. A first computing device comprising one or more processors and one or more transceiver component may receive a signal transmission packet comprising a physical layer (PHY) preamble. The first computing device may identify within the PHY preamble, one or more signal (SIG) fields, wherein at least one of the one or more SIG fields includes at least a length field indicating a length of the signal transmission packet. The first computing device may determine based at least in part on the length field, that the signal transmission packet is associated with a predetermined communication standard utilized to transmit the signal transmission packet. The first computing device may decode the signal transmission packet based at least in part on the determination that the signal transmission packet is associated with the predetermined communication standard.
Abstract:
무선 통신 시스템에서 기지국의 동작 방법이 제공된다. 상기 방법은 단말로부터 상기 단말에 할당된 자원영역에 대한 채널 품질 정보와 상기 자원영역에 대응하는 널링 영역에 대한 비가우시안(non-Gaussian) 정보 중 적어도 하나를 수신하는 과정과, 상기 채널 품질 정보와 상기 비가우시안 정보를 기반으로 상기 단말에 대한 변조 차수, 부호율 및 상기 널링 영역에 대한 상기 자원영역 비율을 결정하는 과정을 포함하는 것을 특징으로 한다.
Abstract:
A method of operation of a communication system includes: calculating a shift distance of a received signal having a distortion; calculating an approximate likelihood of the received signal matching a transmitted signal from the shift distance; determining a bias factor from the distortion; and selecting a determined modulation maximizing a combination of the approximate likelihood and the bias factor for communicating with a device.
Abstract:
Eine Auswerteeinheit (1) weist eine zentrale Datenverarbeitungseinheit (2), zumindest eine Speichereinheit (3) und eine Zuordnungseinheit (4) auf, wobei die Zuordnungseinheit (4) und die zumindest eine Speichereinheit (3) mit der zentralen Datenverarbeitungseinheit (2) verbunden sind. Die zentrale Datenverarbeitungseinheit (2) lädt zumindest ein OFDM-Signal aus der zumindest einen Speichereinheit (3) und übergibt dieses an die Zuordnungseinheit (4). Die Zuordnungseinheit (4) stellt die einzelnen Signalraumpunkte der OFDM-Symbole des zumindest einen OFDM-Signals in einem Konstellationsdiagramm und in einer Rahmenleistungsmatrix dar und gewährleistet, dass über die Diagramme zuordenbar ist, bei welchen Signalraumpunkten es sich um Datensymbole und/oder Pilotsymbole und/oder Nullsymbole und/oder Dummysymbole handelt und mit welcher Modulationsart die Datensymbole und/oder Pilotsymbole moduliert sind.
Abstract:
A method and apparatus for transmitting a training sequence code of a transmitting apparatus with a plurality of transmitting antennas in a communication system are provided. A transmitting apparatus allocates a plurality of time slots for the plurality of transmitting antennas to be divided into at least one frame, and sends a training sequence code with reference power for any one of the transmitting antennas, and sends remaining training sequence codes for remainders of the transmitting antennas with transmission power from zero to the reference power, in any one of the time slots. A receiving apparatus receives a plurality of training sequence codes for a plurality of transmitting antennas through any one of the plurality of receiving antennas from a transmitting apparatus, and selects one of the training sequence codes having the greatest reception power to estimate a channel. This may improve a channel estimation performance in a communication system.