Abstract:
The apparatus of the present invention comprises a group classification part for classifying the entire channels of the FHSS system into a certain number of groups according to the channel bandwidth unit of an FS interference signal; an FS interference elimination part for eliminating a group in which an FS interference exists from said certain number of groups based on the packet error rate (PER) of said certain number of groups that have been classified; and an FD interference avoidance part for avoiding interference by transmitting a packet only if an interference signal does not exist by estimating the existence of said FD interference signal based on a time sequence with respect to the channel to be used for the next frequency hopping (FH), when transmitting a signal by utilizing FH using channels wherein said FS interference signal does not exist.
Abstract:
A user equipment and cell search method for the same are disclosed. The user equipment supports two or more frequency bands. The cell search method for the user equipment includes: receiving intersection data through a first frequency band; and skipping, when the received intersection data is set to a search skip value, cell searching in a second frequency band.
Abstract:
Provided are a channel information generation apparatus and a method for spatial division multiplexing in a wireless communication system and a data transmission apparatus and a method using generated channel information. The channel information generation apparatus performs spatial division multiplexing in an OFDM-based wireless communication system. The channel information generation apparatus includes a codebook storage unit for storing a predefined codebook, a channel correlation information unit that receives channel information corresponding to each of a plurality of sub-carriers and calculates channel correlation coefficient information between the sub-carriers based on the received channel information, and an index calculation unit that calculates an index of an optimal matrix of matrices stored in the codebook storage unit based on the channel information, the channel correlation coefficient information, and the codebook.
Abstract:
A resource allocation method and an apparatus for mitigating inter-cell interference in the heterogeneous cellular communication system are provided. The method for a first type base station to allocate resource in a wireless communication system including the first and second types base stations according to the present invention includes estimating an available Frequency Assignment (FA) not used by a neighbor second type terminal among FAs used by the first type base station, and allocating sub-channels associated with one of the available FAs not used by the neighbor second type terminal to a first type terminal, wherein the second type base station allocates the sub-channels for uplink and downlink transmissions of the second type terminal over a predetermined time period such that an FA in which sub-channels for the uplink transmissions are allocated and the FA in which sub-channels for the downlink transmissions are allocated are the same.
Abstract:
Compounds used to inhibit glycolytic pathway small molecule kinase 6-Phosphofructo-2-kinase/Fructose-2,6-bisphosphatase (PFKFB) are set forth; these inhibitors can be used in the treatment of certain diseases in which cells or tumors rely on glycolytic metabolism, such as many cancer cells.
Abstract:
A navigation method and apparatus of a mobile terminal displays only a particular point of interest (POI) existing by the roadside of a pre-set route when the POI is selected by the user, to thereby provide the user-selected POI without changing the route (or without re-searching the route). The navigation apparatus of a mobile terminal includes a display unit configured to display a route from a current location to a destination on map data, and a controller configured to search a first point of interest (POI) among the first POI located by the roadside of the route and a second POI located near the route, and display location information of the searched first POI on the display unit.
Abstract:
In a method of canceling crosstalk signals, decoding or precoding through a diagonal channel analysis of the user domain and the time domain is performed, in addition to decoding or precoding in the user and time domains.
Abstract:
An UpLink (UL) scheduling method and apparatus considering a characteristic of a power amplifier in a mobile communication terminal are provided. The UL scheduling method includes calculating a packet transmission time, which minimizes energy consumed in packet transmission, by using a Direct Current (DC) voltage used in a power amplifier for signal amplification and by using nonlinear amplification efficiency; and scheduling UL data by using the calculated packet transmission time.
Abstract:
An apparatus and method for uplink (UL) power control in a broadband wireless access (BWA) communication system are provided. In a communication method for a base station (BS), the channel gain, noise power and speed of each MS are determined, and the maximum allowable power of each mobile station (MS) are calculated using the determined channel gain, noise power and speed of each MS. Because the UL power is controlled according to the speed of the MS and the distance from the BS, the method can provide higher system capacity than the conventional power adaptation scheme.
Abstract:
The present invention is about a method and apparatus for direct sequence spread spectrum (DS/SS) system receivers that employ a channel estimator for coherent demodulation. The proposed DS/SS receiver is composed of the channel estimation controller (CEC), the channel parameter estimator (CPE), the channel estimation filter (CEF) module and the demodulator module. The proposed scheme estimates the channel environment when the pilot signal is transmitted in parallel with the message signal for coherent detection. The internal parameters of the CPE and the CEF are determined by the CEC according to the operating conditions. The CPE adaptively controls the bandwidth of the CEF by classifying the channel type from the received pilot signal. Thus, the proposed scheme can obtain improved channel information, providing the enhancement of the receiver performance. This enhancement can provide the improvement of the link performance, the service time and/or the user capacity.