TY  - JOUR
T1  - New bounds on the total squared correlation and optimum design of DS-CDMA binary signature sets.
JF  - IEEE Transactions on communications
A1  - Karystinos, G.N
LA  - English
UL  - https://tuklas.up.edu.ph/Record/UP-99796217609484017
AB  - The Welch lower bound (see Welch, R.L., IEEE Trans. Inform. Theory, vol.IT-20, p.397-9, 1974) on the total squared correlation (TSC) of signature sets is known to be tight for real-valued signatures and loose for binary signatures whose number is not a multiple of four. We derive new bounds on the TSC of binary signature sets for any number of signatures K and any signature length L. Then, for almost all K, L in {1,2,...,256}, we design optimum binary signature sets that achieve the new bounds. The design procedure is based on simple transformations of Hadamard matrices.
KW  - DS-CDMA.
KW  - Hadamard matrices.
KW  - Welch lower bound.
KW  - Binary sequences.
KW  - Binary signature sets.
KW  - Communication channel.
KW  - Direct-sequence code-division-multiple-access.
KW  - Signal design.
KW  - Spreading codes.
KW  - Total squared correlation.
ER  -