Analysis of MUSIC-based delay estimators for direct-sequence code-divisionmultiple-access systems

Most receiver designs for asynchronous direct-sequence code-division multip le-access (DS-CDMA) systems exploit timing information to simultaneously de tect the desired signal and suppress the interference. In this paper, a pre viously proposed MUSIC delay estimation algorithm is considered which requi res no initial information and no exhaustive search of the delays. Based on a Taylor series expansion, approximations of the first and second moments of the delay estimation error are derived for this MUSIC algorithm. The ana lysis is alternative and further to that previously performed.