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DIGITAL RECEIVER PERFORMANCE IN THE PRESENCE OF IMAGE FREQUENCIES

  • US 20140098838A1
  • Filed: 10/10/2013
  • Published: 04/10/2014
  • Est. Priority Date: 10/10/2012
  • Status: Active Grant
First Claim
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1. A method for receiving a message transmitted on one of a plurality of channels of a hop sequence of a multi-hop communication system, each channel having an associated frequency, and wherein when a message is transmitted on one channel of the hop sequence other channels of the sequence may exhibit images of the message, the method comprising the steps of:

  • scanning the plurality of channels in the hop sequence;

    determining for each of the scanned channels a value indicative of signal strength on the channel;

    selecting one of the channels having a signal strength value that satisfies a threshold;

    evaluating the selected channel in an attempt to detect a preamble of a message on that channel;

    if the preamble is detected on the selected channel, tuning a receiver to a second channel in the hop sequence and evaluating the second channel in an attempt to detect the preamble on that second channel;

    if no preamble is detected on the second channel, tuning the receiver back to the selected channel and receiving a remainder of the message on that selected channel; and

    if the preamble is detected on the second channel, then maintaining the receiver tuned to the second channel and receiving the remainder of the message on that second channel.

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