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US 2011/0032921 A1Published application
Communication system using ofdm for one direction and dsss for another direction
AssigneeAdaptix, Inc.
InventorsXiaodong Li, Hui Liu, Wenzhong Zhang
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Abstract
A method and apparatus for wireless communication are described. In one embodiment, a method for communicating with a subscriber comprises transmitting orthogonal frequency domain multiplexing (OFDM) signals to the subscriber, and receiving direct-sequence spread spectrum (DSSS) signals from the subscriber.
Claims48
A method comprising:
- transmitting an orthogonal frequency division multiplexing (OFDM) signal in a downlink;
- receiving a frequency hopping signal generated by a subscriber in an uplink, wherein said frequency hopping signal does not comprise an OFDM signal;
- and
- enabling use of an OFDM subcarrier cluster of said OFDM signal using said received frequency hopping signal.
1 more element
A method comprising:
- transmitting a frequency hopping signal generated by a subscriber in an uplink, wherein said frequency hopping signal does not comprise an OFDM signal;
- receiving an orthogonal frequency division multiplexing (OFDM) signal in a downlink;
- and
- enabling use of an OFDM subcarrier cluster of said OFDM signal using said transmitted frequency hopping signal.
1 more element
A system comprising:
- a transmitter adapted to transmit an orthogonal frequency division multiplexing (OFDM) signal in a downlink;
- a receiver adapted to receive a frequency hopping signal generated by a subscriber in an uplink, wherein said frequency hopping signal does not comprise an OFDM signal;
- and
- circuitry adapted to enable use of an OFDM subcarrier cluster of said OFDM signal using said received frequency hopping signal.
1 more element
A system comprising:
- a transmitter adapted to transmit a frequency hopping signal generated by a subscriber in an uplink, wherein said frequency hopping signal does not comprise an OFDM signal;
- a receiver adapted to receive an orthogonal frequency division multiplexing (OFDM) signal in a downlink;
- and
- circuitry adapted to enable use of an OFDM subcarrier cluster of said OFDM signal using said transmitted frequency hopping signal.
1 more element
Dependencies are inferred from the claim text.