Proceedings of 1994 28th Asilomar Conference on Signals, Systems and Computers (1994)
Pacific Grove, CA, USA
Oct. 31, 1994 to Nov. 2, 1994
H.C. Huang , Dept. of Electr. Eng., Princeton Univ., NJ, USA
S.C. Schwartz , Dept. of Electr. Eng., Princeton Univ., NJ, USA
We consider a linear multiuser array detector (MUAD) for synchronous direct-sequence code division multiple access channels. It consists of a bank of decorrelating detectors followed by a user-dependent combining and decision scheme. Unlike a previous linear MUAD, this detector does not require interfering user parameter estimates; hence it retains its near-far resistant characteristics even in the presence of interfering user parameter mismatch. Given the decorrelating detector outputs, minimum variance unbiased estimates can be derived for the users' amplitudes, phases, and sensor phase offsets. Amplitude dependent and independent, coherent and noncoherent detection schemes for on-off keyed (OOK) signals are developed. Even when the phases and sensor phase offsets are unknown, this detector provides significant performance gains over the conventional coherent decorrelating detector.<
pseudonoise codes, spread spectrum communication, code division multiple access, signal detection, telecommunication channels, radiofrequency interference, correlation methods, parameter estimation
H. Huang and S. Schwartz, "Noncoherent multiuser detection using array sensors," Proceedings of 1994 28th Asilomar Conference on Signals, Systems and Computers(ACSSC), Pacific Grove, CA, USA, 1995, pp. 863-867.