Noncoherent detection in asynchronous multiuser channels

Noncoherent detection in asynchronous multiuser channels

The noncoherent demodulation of multiple differentially phase-shift-keyed signals transmitted simultaneously over an asynchronous code-division multiple-access (CDMA) channel is considered under the white Gaussian background noise regime. A class of bilinear detectors is defined with the objective of obtaining the optimal bilinear detector. The asymptotic efficiency of the bilinear detectors is...

Noncoherent decision-feedback multiuser detection

The problem of noncoherent multiuser detection for multipulse modulation over the Gaussian multiuser channel is studied. It is assumed that neither the energies nor the carrier phases of the signals of any of the users are available at the receiver. Recently, a post-decorrelative generalized likelihood ratio test (GLRT) based detector was proposed as a solution to this problem. In this paper, w...

A Systematic Approach to Noncoherent Detection for DPSK Modulation in Multiuser Correlated Diversity Rayleigh Fading Channels

A correlated diversity Rayleigh fading (CDRF) channel models inter-diversity fading and signal correlations. This paper considers the multiuser CDRF channel wherein several users transmit information simultaneously using signals with inter-diversity as well as inter-user correlations. Each user employs DPSK modulation. Besides allowing simple noncoherent detection without channel estimation alg...

Optimum multiuser noncoherent DPSK detection in generalized diversity Rayleigh-fading channels

The jointly optimum multiuser noncoherent detector for DPSK modulation over the generalized diversity Rayleigh fading (GDRF) channel is derived and analyzed. The GDRF channel includes time/frequency/receiver antenna diversity and allows fading correlations between the various diversity branches of each user. Noncoherent detection here refers to the case where the receiver has neither knowledge ...

Multiuser Detection in Fading Channels