Angle diversity for nondirected wireless infrared communication

Author

Carruther, J.B. ; Kahn, Joseph M.

Author_Institution

Dept. of Electr. & Comput. Eng., Boston Univ., MA, USA

Volume

48

Issue

6

fYear

2000

fDate

6/1/2000 12:00:00 AM

Firstpage

960

Lastpage

969

Abstract

We outline the benefits and challenges of using angle diversity in nondirected wireless infrared (IR) communications systems. Multiple transmitter beams and multiple narrow field-of view receivers reduce the path loss, multipath distortion, and background noise of the channel, which leads to improved range. We also discuss practical considerations for multielement angle diversity systems, including channel characterization and suboptimal detection techniques. Maximal-ratio combining provides nearly optimal performance up to 100 Mb/s for the angle diversity systems considered. The design and performance of a prototype angle diversity IR communication system are discussed. The prototype can maintain 70 Mb/s at a P_e of 10^-9 over a 4-m range

Keywords

diversity reception; multipath channels; optical receivers; optical signal detection; optical transmitters; optimisation; 100 Mbit/s; 4 m; 70 Mbit/s; IR communications systems; background noise; channel characterization; error probability; maximal-ratio combining; multielement angle diversity systems; multipath distortion; multiple narrow field-of view receivers; multiple transmitter beams; nondirected wireless infrared communication; optimal performance; optimal signal detection; path loss reduction; range; suboptimal detection techniques; system design; Delay; Distortion; Diversity reception; Optical fiber communication; Optical noise; Optical receivers; Optical transmitters; Propagation losses; Signal detection; Wireless communication;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/26.848557

Filename

848557