Patent ID: 9065715
Filing Date: 2015-06-23
Classification: H04L

Abstract:
1. A method for operating a radio communication system which uses Orthogonal Frequency Division Multiplexing (OFDM), comprising: modulating a first symbol of an OFDM symbol onto a first carrier frequency at a first sending station to produce a first modulated signal; sending the first modulated signal from the first sending station to a first receiving station via a first transmission channel using an air interface; changing the first carrier frequency at the first sending station during a period in which the OFDM symbol is being sent, the first carrier frequency being continuously and linearly changed during the period in which the OFDM symbol is being sent, independently of changing transmission characteristics of the first transmission channel over time; and wherein the carrier frequency is changed at least twice and has a step length which is less than a frequency spacing between two adjacent carrier frequencies.