Minimum Total-Squared-Correlation Quaternary Signature Sets: New Bounds and Optimal Designs
Journal article (postprint)
STATE UNIV OF NEW YORK AT BUFFALO DEPT OF ELECTRICAL ENGINEERING
Pagination or Media Count:
We derive new bounds on the total squared correlation TSC of quaternary quadriphase signaturesequence sets for all lengths L and set sizes K. Then, for all K, L, we design minimum-TSC optimal sets that meet the new bounds with equality. Direct numerical comparison with the TSC value of the recently obtained optimal binary sets shows under what K, L realizations gains are materialized by moving from the binary to the quaternary code-division multiplexing alphabet. On the other hand, comparison with the Welch TSC value for realcomplex-field sets shows that, arguably, not much is to be gained by raising the alphabet size above four for any K, L. The sum-capacity as well as the maximum squared correlation and total asymptotic efficiency of minimum TSC quaternary sets is also evaluated in closed-form and contrasted against the sum capacity of minimum-TSC optimal binary and realcomplex sets.
- Radio Communications