Abstract:
PURPOSE: A hybrid multiuser interference cancellation method using a dynamic programming-based grouping technique and an apparatus therefor are provided to prevent the deterioration of detection performance due to a signal power difference by forming at least a group so that each of the received user signal power differences can be minimized. CONSTITUTION: A hybrid multiuser interference cancellation apparatus(300) comprises a channel estimator(301), a sorting part(302), a cluster calculator(303), and a hybrid interference canceller(304). The channel estimator(301) discriminates use signals from a plurality of signals received from the external and calculates the power of each of the discriminated user signals. The sorting part(302) arranges the calculated user signal power in the order of a descending series. The cluster calculator(303) forms more than a group through a dynamic programming-based grouping technique using the sequential numbers based on the arranged user signal power.
Abstract:
PURPOSE: A method and an apparatus for transmitting OFDM-based burst packet data are provided to utilize efficiently resources by transmitting directly the corresponding packet data to a base station in a frame having a variable connection packet data transmission position. CONSTITUTION: A resource related to a process for transmitting a preamble to a base station is determined. The preamble is generated according to the determined resource. The generated preamble is transmitted to the base station. A response message and a signal related to a packet data transmission position within a corresponding frame are received from the base station. An analyzing process for the received signals is performed. The corresponding packet data are transmitted to the base station according to the analyzed result.