Abstract:
A method and apparatus for detecting a signal using a cyclo-stationary characteristic value is provided. A method of detecting a signal using a cyclo-stationary characteristic value includes: calculating cyclo-stationary characteristic values with respect to a cyclic frequency domain of an input signal; multiplying the calculated cyclo-stationary characteristic values with each other; and detecting the signal from the input signal based on the result of the multiplication.
Abstract:
Es sind ein Verfahren zum Senden und Empfangen eines Frames in einem drahtlosen lokalen Netzwerk-(WLAN-)System und eine Vorrichtung für dieses Verfahren offenbart. Ein Verfahren zum Erzeugen von Interferenz/Nichtinterferenzstationslisten enthält ein Empfangen eines ersten Frames von einer zweiten Station, ein Erlangen einer Empfängeradresse des ersten Frames von dem ersten Frame, und, basierend darauf, ob ein zweiter Frame, der eine Antwort auf den ersten Frame ist, von einer durch die Empfängeradresse angezeigten dritten Station innerhalb einer voreingestellten Zeit ab einer Zeit, zu welcher der erste Frame empfangen worden ist, zu empfangen ist, Einstellen der dritten Station als eine Interferenzstation oder eine Nichtinterferenzstation. Daher kann die Leistungsfähigkeit eines Kommunikationssystems verbessert werden.
Abstract:
PURPOSE: A channel allocation method of a wireless multi-channel recognition network is provided to minimize the number of operation channels in a multi channel recognition wireless network. CONSTITUTION: A specific channel set S1 is composed(S310). The capacity Cm is calculated for a channel m of the S1(S320). A task Jm is allocated in the channel of the S1(S330). Works allocated to the channel according to corresponding work distribution(S340,S360). It is determined whether to minimize total used channels(S350).
Abstract:
A method and an apparatus for allocating a hybrid burst in an OFDMA(Orthogonal Frequency Division Multiple Access) system is provided to reduce a burst allocation information bit and an overhead size by allocating a burst using a burst length. A method for allocating a hybrid burst in an OFDMA system includes the steps of: sequentially allocating the bursts, which are mapped along a frequency axis for a downlink data transmission, to each terminal(S630); dividing the data burst region of the sub-frame into at least one segment in the time region and sequentially allocating the bursts, which are mapped in the segment along the time axis, to each terminal(S650); sequentially allocating the bursts, which are mapped along a time axis for an uplink data transmission, to each terminal(S670); and sequentially allocating the bursts which are mapped along a whole time axis of a data burst region of the sub-frame to each terminal, to each terminal(S680).
Abstract:
A resource allocation method for an OFDM(Orthogonal Frequency Division Multiplexing Access) system is provided to maximize diversity without decreasing degree of freedom of sub-band selection. According to a resource allocation method for an OFDM(Orthogonal Frequency Division Multiplexing Access) system, a plurality of sub-bands is generated by partitioning an occupied frequency band of a fixed number of OFDM symbols, and the number of diversity sub-channels including more than two time/frequency resources belonging to the different sub-band and the number of sub-band selection sub-channels constituted with time/frequency resource not belonging to the diversity sub-channel are determined. A diversity sub-channel and a sub-band selection sub-channel are generated according to the determined number, and a physical channel constituted with the generated sub-channel is allocated to a user in a cell.