Adaptive Antenna Subarray Formation for MIMO Systems

Author

Karamalis, Panagiotis D. ; Skentos, Nikolaos D. ; Kanatas, Athanasios G.

Author_Institution

Lab. of Mobile Radiocommunications, Nat. Tech. Univ. of Athens

Volume

5

Issue

11

fYear

2006

fDate

11/1/2006 12:00:00 AM

Firstpage

2977

Lastpage

2982

Abstract

MIMO systems with reduced hardware complexity have attracted researchers´ attention due to their high efficiency and low cost. Sub-optimum algorithms for antenna subset selection have been intensively studied in the literature. In this paper we present a new technique to maximize the capacity of multiple antenna wireless systems with reduced available RF chains. The technique is based on the adaptive formation of subarrays, i.e. the grouping of antenna elements and the application of appropriate element weights. The elements of each subarray and their weights are dynamically selected by an evolutionary optimization technique using the link capacity as a cost function

Keywords

MIMO communication; adaptive antenna arrays; evolutionary computation; optimisation; radio links; MIMO systems; adaptive antenna subarray formation; antenna subset selection; evolutionary optimization technique; hardware complexity; link capacity; multiple antenna wireless systems; Adaptive arrays; Antenna arrays; Antennas and propagation; Costs; Hardware; MIMO; Phase shifters; Radio frequency; Scattering; Stochastic processes;

fLanguage

English

Journal_Title

Wireless Communications, IEEE Transactions on

Publisher

ieee

ISSN

1536-1276

Type

jour

DOI

10.1109/TWC.2006.04532

Filename

4027761