Type
ArticleKAUST Department
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) DivisionElectrical Engineering Program
Young Talent Development
Communication Theory Lab
Date
2013-11Permanent link to this record
http://hdl.handle.net/10754/563077
Metadata
Show full item recordAbstract
There has been tremendous work done on designing space-time codes for the quasi-static multiple-input multiple output (MIMO) channel. All the coding design up-to-date focuses on either high-performance, high rates, low complexity encoding and decoding, or targeting a combination of these criteria [1]-[9]. In this paper, we analyze in details the performance limits of diagonal lattice space-time codes under lattice decoding. We present both lower and upper bounds on the average decoding error probability. We first derive a new closed-form expression for the lower bound using the so-called sphere lower bound. This bound presents the ultimate performance limit a diagonal lattice space-time code can achieve at any signal-to-noise ratio (SNR). The upper bound is then derived using the union-bound which demonstrates how the average error probability can be minimized by maximizing the minimum product distance of the code. Combining both the lower and the upper bounds on the average error probability yields a simple upper bound on the the minimum product distance that any (complex) lattice code can achieve. At high-SNR regime, we discuss the outage performance of such codes and provide the achievable diversity-multiplexing tradeoff under lattice decoding. © 2013 IEEE.Citation
Abediseid, W., & Alouini, M.-S. (2013). On the Performance of Diagonal Lattice Space-Time Codes. IEEE Transactions on Wireless Communications, 12(11), 5717–5727. doi:10.1109/twc.2013.092413.130034Sponsors
This paper was funded in part by a grant from King Abdulaziz City of Science and Technology.ae974a485f413a2113503eed53cd6c53
10.1109/TWC.2013.092413.130034