Joint Multiuser Detection of Multidimensional Constellations over Fading Channels

• We investigate the error performance of multidimensional constellations in the multiple access and broadcast channels. More specifically, we provide closed-form expressions for the pairwise error probability (PEP) of the joint maximum likelihood detection, for multiuser signaling in the presence of additive white Gaussian noise and Rayleigh fading. Arbitrary numbers of users and multidimensional signal sets are assumed, while the provided formula for the PEP is a function of the dimension-wise distances of the multidimensional constellation. Furthermore, a useful upper bound on the average symbol error probability is also obtained through the union bound. The analysis is applied to the sparse code multiple access systems. The analytical results are validated successfully through simulations, and show their importance in the multidimensional constellation design.

Subject headings

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)

Keyword

average symbol error probability (ASEP)

broadcast (BC) channels

joint maximum likelihood (ML) detection

Multidimensional constellations

multiple access (MAC) channels

Sparse code multiple access (SCMA)

Block codes

Errors

Fading channels

Gaussian noise (electronic)

Maximum likelihood

Modulation

Multiuser detection

Probability

Rayleigh fading

Trellis codes

White noise

Additive White Gaussian noise

Joint maximum likelihood

Joint multiuser detection

Multidimensional signals

Multiple access

Pair-wise error probability

Symbol error probabilities (SEP)

Error detection

Publication and Content Type

ref (subject category)

art (subject category)