High-SNR power offset in multiantenna communication

被引：192
作者：
Lozano, A
Tulino, AM
Verdú, S
机构：
[1] Bell Labs, Lucent Technol, Holmdel, NJ 07733 USA
[2] Univ Naples Federico II, I-80125 Naples, Italy
[3] Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USA
来源：
IEEE TRANSACTIONS ON INFORMATION THEORY | 2005年 / 51卷 / 12期
关键词：
antenna correlation; channel capacity; coherent communication; fading channels; high-SNR analysis; multiantenna arrays; Ricean channels;
D O I：
10.1109/TIT.2005.858937
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
The analysis of the multiple-antenna capacity in the high-SNR regime has hitherto focused on the high-SNR slope (or maximum multiplexing gain), which quantifies the multiplicative increase as a function of the number of antennas. This traditional characterization is unable to assess the impact of prominent channel features since, for a majority of channels, the slope equals the minimum of the number of transmit and receive antennas. Furthermore, a characterization based solely on the slope captures only the scaling but it has no notion of the power required for a certain capacity. This paper advocates a more refined characterization whereby, as a function Of SNR vertical bar(dB), the high-SNR capacity is expanded as an affine function where the impact of channel features such as antenna correlation, unfaded components, etc., resides in the zero-order term or power offset. The power offset, for which we find insightful closed-form expressions, is shown to play a chief role for SNR levels of practical interest.
引用
收藏
页码：4134 / 4151
页数：18
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