RECEIVER FOR RECEIVING SINGLE-CARRIER AND MULTICARRIER, MOBILE STATION RECEIVER, METHOD FOR RECEIVING MULTICARRIER, AND METHOD FOR RECEIVING BOTH SINGLE CARRIER AND MULTICARRIER

摘要

PROBLEM TO BE SOLVED: To realize a method and a device for receiving both single carrier and multicarrier with high cost performance.;SOLUTION: According to the method or single-carrier and multi-carrier reception, the following steps are executed: downconverting a received RF signal to in-phase(I) and quadrature(Q) channel signals, each containing a plurality of sub-carriers at a low intermediate frequency, and when required, one sub-carrier or a single carrier centered around 0 Hz; filtering interfering signals outside of a frequency band of interest with analog low-pass filters in the I and Q channels; converting the I and Q channel signals into digital representations thereof; in the multicarrier reception case, separating sub-carriers that are images of one another by quadrature downmixing the digital representations of the I and Q channel signals to baseband in the digital domain; and digitally adding or subtracting resulting I and Q signals.;COPYRIGHT: (C)2002,JPO