Receiving and sending synchronization method used for wireless channel absolute time delay test

Receiving and sending synchronization method used for wireless channel absolute time delay test

  • CN 101,488,802 A
  • Filed: 02/25/2009
  • Published: 07/22/2009
  • Est. Priority Date: 02/25/2009
  • Status: Active Application
First Claim
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1. a receiving and sending synchronization method that is used for wireless channel absolute time delay test is characterized in that, described method contains following steps successively:

  • Step 1;

    use reference source to make the transmitting-receiving two-end clock synchronization;

    Step 2;

    use same reset signal, respectively to making a start and the timer of receiving end carries out zero clearing and resets;

    Step 3;

    sending and receiving end timer meter is during to synchronization, the transmission data of making a start, and receiving end begins to receive simultaneously;

    Step 4;

    put make a start antenna and receiving end antenna, making the distance between the two is 0, record measuring system group delay this moment;

    Step 5;

    make a start and receiving end separately after, the moment that receives data with receiving end deducts the moment that receiving end begins to receive, and obtains total propagation delay time;

    Step 6;

    with the total propagation delay time that obtains in the step 5, deduct the measuring system group delay that obtains in the step 4, can obtain the absolute time delay that signal is propagated aloft.

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