m-Sequences have been used widely in many applications, but the corresp onding computation of the cor relation-detec-tion is overwhelming N2 operations, where N ist he length of the m-sequence, such that it is unpractical. In this paper, atrans form from p-ary m-sequence matrices to generalized Hadamard matrices is developed; and then by the fast generalized Hadamard matrices trans form, a fast p-ary m-sequence trans form is developed. The results show that the computation can be dramatically reduced from N2 to NlogpN operations, so the fast p-ary m-sequence trans form could enable a rapid correla- tion-detection at the receiver .

In this correspondence, several errors have been noted and corrected in the performance analysis of a widely referred paper.

In this correspondence, a new class of pseudonoise sequences over GF (P), based on Gordon-Mills-Welch (GMW) sequences, is constructed. The sequences have the property that, in a specified zone, the out-of-phase autocorrelation and cross-correlation values are all equal to-1. Such sequences with low correlation zone (LCZ) are suitable for approximately synchronized code-division multiple-access (CDMA) system.

To eliminate co-channel and multipath interference, a spreading sequence set with a low or zero correlation zone can be used in an AS-CDMA system. Here, lower bounds on aperiodic and odd correlation of the sequences with equal energy and a low or zero correlation zone are presented.

To elinminatc multiple access interfcrenec, approximately synchronised code division multiple access systems cmploy spreading sequence scts with low or zero corrclation zohc properlies. The authors present a method for deriving. The bounds on the correlation of a polyphase sequence set concerning the size, length and low or zcro corrclation zone based on Weleh's technique