The first and second steps series iterative method for area searching in time-divided duplexing system

The first and second steps series iterative method for area searching in time-divided duplexing system

CN
  • CN 1,780,175 A
  • Filed: 11/19/2004
  • Published: 05/31/2006
  • Est. Priority Date: 11/19/2004
  • Status: Active Grant
First Claim
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1. , the simultaneous iteration of Cell searching first and second steps in a kind of tdd systems is characterized in that, may further comprise the steps:

  • Step 1, iterations counter are set to zero;

    Step 2, it is rapid to carry out initial cell search first step, be used for relevant by candidate SYNC-DL code word and received signal are done, and comparison related power peak value after, detect one or more SYNC-DL code word and sync bit thereof;

    Step 3, carry out search of initial zone second step, be used for according to the preceding once rapid testing result of initial cell search first step of execution, relevant by the candidate Midamble code word and the appropriate section of received signal are done, and relatively behind the correlated results, detect the Midamble code word in each code character successively respectively, and calculate " reliability " of the Midamble code word that detects in each code character;

    Simultaneously, it is rapid to carry out initial cell search first step once more, be used for relevant by candidate SYNC-DL code word and received signal are done, and relatively behind the related power peak value, detect one or more SYNC-DL code word and sync bit thereof of making new advances;

    Step 4, according to the testing result of second step of search of initial zone in step 3, if having at least " reliability " of a Midamble code word that is detected to surpass a threshold parameter T1, termination of iterations process then, and carry out subsequent operation;

    Otherwise, then continue execution in step five;

    Step 5 is with the value increase by of iterations counter;

    Step 6 compares value and a default thresholding T2 of iterations counter, if iterations is no more than this thresholding, then returns step 3 and begins new iteration once;

    Otherwise, termination of iterations process then, and carry out subsequent operation.

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