TRANSMITTING/RECEIVING APPARATUS AND METHOD FOR PHASE ESTIMATION OF SUBCARRIER IN A UPLINK IN A ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEM

摘要

A transmitting/receiving method and an apparatus for a phase estimation of a subcarrier in an uplink in an orthogonal frequency division multiplexing system are provided to use effectively a restrict resource by performing a data transmission process and a subcarrier tracking process at the same time. A base station for allocating resources to users determines whether a user is a VoIP user(501). Whether the user is the VoIP(Voice over Internet Protocol) user, the base station determines whether the user is located on a cell boundary(503). When the user is located on the cell boundary, first or two subcarriers are allocated to the user(505) and a proper modulation/demodulation scheme is determined. When the user is not the VoIP user or the user is not located on the cell boundary, the base station determines whether the user is a high speed user(507). When the user is the high speed user and a frequency selective fading atmosphere is detected(509), the base station uniformly allocates resources on an overall frequency band(511). The base station allocates the resources according to a conventional scheme(513).