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Channel probing signal for a broadband communication system

  • US 9,948,488 B2
  • Filed: 07/01/2014
  • Issued: 04/17/2018
  • Est. Priority Date: 01/29/2004
  • Status: Active Grant
First Claim
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1. A communication method for a mobile device served by a base station in a communication system employing Orthogonal Frequency Division Multiplexing (OFDM), the mobile device transmitting data information on data subcarriers and control information on control subcarriers in an uplink frequency band to the base station, the method comprising:

  • receiving, at the mobile device, an instruction from the serving base station to transmit a probing signal;

    forming, in response to the received instruction, the probing signal with a code sequence modulated in the frequency domain, wherein;

    the probing signal is configured to overlap, in the time domain, with uplink signals transmitted over the uplink frequency band of the communication system; and

    the probing signal is configured to overlap, in the frequency domain, with the data subcarriers but to avoid the control subcarriers in the uplink frequency band of the communication system; and

    transmitting the probing signal to the serving base station.

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