Spatial multiplexing with MRC and ZF receivers in ad hoc networks

Authors:
Raymond H. Y. Louie;Matthew R. McKay;Iain B. Collings
Affiliations:
Telecommunications Lab, School of Electrical and Information Engineering, University of Sydney, Australia and Wireless Technologies Laboratory, ICT Centre, CSIRO, Sydney, Australia;Department of Electronic and Computer Engineering, Hong Kong University of Science and Technology, Hong Kong;Wireless Technologies Laboratory, ICT Centre, CSIRO, Sydney, Australia
Venue:
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
Year:
2009

Citing 7
Cited 2

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Abstract

This paper investigates the performance of point-to-point spatial multiplexing with stream control and slotted ALOHA in ad hoc networks. In particular, we derive new closed-form outage probability, network throughput and transmission capacity expressions for spatial multiplexing with maximum-ratio-combining (MRC) and zero forcing (ZF) receivers. From these expressions, we show that the relative throughput of MRC and ZF receivers is dependent on node intensity and SINR threshold levels. In addition, we present a new transmission capacity scaling law for ZF receivers, which shows that increasing the number of transmitted data streams can either increase or decrease the transmission capacity depending on the path loss exponent and number of receive antennas. We also present conditions such that the transmission capacity using spatial multiplexing with ZF receivers is greater than orthogonal space time block codes.