Ofdm communication system with fast frequency hops
AssigneesNokia Solutions and Networks Oy, Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e. V.
InventorVolker Jungnickel
Life of this patent
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Abstract
A method for operating a radio communication system involves the use of OFDM and involves a first sending station modulating a first OFDM symbol onto a first carrier frequency and sending the first OFDM symbol to a first receiving station via a first transmission channel using an air interface. The first sending station changes the first carrier frequency during a time used for sending the first OFDM symbol, the change in the first carrier frequency being made independently of a change in transmission characteristics of the first transmission channel over time. A fast frequency hopping system is disclosed.
Claims21
1-14. (canceled)
A method for operating a radio communication system which uses Orthogonal Frequency Division Multiplexing (OFDM), comprising:
- modulating a first 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;
- and
- changing the first carrier frequency at the first sending station while sending the first OFDM symbol, the first carrier frequency being changed independently of changing transmission characteristics of the first transmission channel over time.
A sending station for a radio communication system which uses Orthogonal Frequency Division Multiplexing (OFDM), comprising:
- a modulator to modulate a first OFDM symbol onto a first carrier frequency;
- a transmitter to send the first OFDM symbol to a first receiving station via a first transmission channel using an air interface;
- a frequency changing unit to change the first carrier frequency while the first OFDM symbol is being sent, the first carrier frequency being changed independently of changing transmission characteristics of the first transmission channel over time.
A receiving station for a radio communication system which uses Orthogonal Frequency Division Multiplexing (OFDM), comprising:
- a receiver to receive a first OFDM symbol from a first sending station via a first transmission channel using an air interface, the first OFDM symbol being modulated onto a first carrier frequency with the first carrier frequency being changed while the first OFDM symbol is being sent;
- and
- a frequency changing unit to change the first carrier frequency while receiving the first OFDM symbol, the frequency changing unit changing the first carrier frequency in a same manner as was done by the first sending station, the first carrier frequency being changed independently of changing transmission characteristics of the first transmission channel over time.
Dependencies are inferred from the claim text.