DocumentCode :
106134
Title :
Arbitrary Precoding with Single-Fed Parasitic Arrays: Closed-Form Expressions and Design Guidelines
Author :
Barousis, Vlasis I. ; Papadias, Constantinos B.
Author_Institution :
Broadband Wireless & Sensor Networks Group, Athens Inf. Technol., Athens, Greece
Volume :
3
Issue :
2
fYear :
2014
fDate :
Apr-14
Firstpage :
229
Lastpage :
232
Abstract :
Single-fed compact arrays known as electronically steerable parasitic antenna radiators (ESPARs) have recently emerged as a new paradigm for spatial multiplexing that requires only a single radio-frequency (RF) chain and a few easy-to-implement analog tunable loads. Besides the remarkable hardware savings, the ESPAR capabilities are still limited as it is not possible to find appropriate loadings that multiplex any signaling format over the air. Indeed, commonly the loading values are obtained through time-consuming iterative algorithms, e.g. exhaustive search, and can only emulate MIMO transmission of signals emerging from low-order constellations. This paper constitutes a clear step forward in solving this problem, as it defines the necessary guidelines for the design of single-fed ESPAR systems that are able to support an arbitrary precoding scheme. To alleviate the need for iterative processes, the proposed design methodology uses complex tunable loads and introduces new closed-form expressions for the exact computation of the loads and the feeding voltage.
Keywords :
antenna arrays; antenna feeds; antenna radiation patterns; iterative decoding; precoding; space division multiplexing; telecommunication signalling; MIMO transmission; arbitrary precoding scheme; closed-form expression; electronically steerable parasitic antenna radiator; exhaustive search; iterative algorithm; low-order constellation; signaling format; single RF chain; single radiofrequency chain; single-fed ESPAR system; single-fed compact parasitic array; spatial multiplexing; Antenna arrays; Impedance; Loading; MIMO; Ports (Computers); Radio frequency; Wireless communication; ESPAR; Parasitic antenna arrays; compact arrays; space-time coding; spatial multiplexing;
fLanguage :
English
Journal_Title :
Wireless Communications Letters, IEEE
Publisher :
ieee
ISSN :
2162-2337
Type :
jour
DOI :
10.1109/WCL.2014.020614.130863
Filename :
6742715
Link To Document :
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