CDMA Signature Sequences With Low Peak-To-Average Ratio Via Alternating Minimization


J. A. Tropp, I. Dhillon, R. W. Heath, Jr., and T. Strohmer


Proc. of IEEE Asilomar Conf. on Signals, Systems, and Computers, Pacific Grove, CA, Nov. 9-12, 2003.


Several algorithms have been proposed to construct optimal signature sequences that maximize the sum capacity of the uplink in a direct-spread synchronous code division multiple access (CDMA) system. These algorithms produce signatures with real-valued or complex-valued entries that generally have a large peak-to-average power ratio (PAR). This paper presents an alternating projection algorithm that can design optimal signature sequences that satisfy PAR side constraints. This algorithm converges to a fixed point, and these fixed points are partially characterized.

This paper is available as a .IEEE Xplore .