Walsh code assignment and data structure for variable data rate communications

Author

Wang, Michael Mao ; Brown, Tyler ; Fleming, Philip ; Xu, Hua

Author_Institution

Qualcomm Inc., San Diego

Volume

56

Issue

3

fYear

2008

fDate

3/1/2008 12:00:00 AM

Firstpage

339

Lastpage

343

Abstract

In digital communication systems, variable-length Walsh codes, also called orthogonal variable spreading factor codes, are used to support simultaneous variable-rate data transmission. This paper describes algorithms for dynamic variable- length Walsh code assignment. Optimal assignment criterion is derived and an efficient data structure for maintaining variable- length Walsh codes is introduced. The benefits of code reallocation are also studied. Performance is evaluated via simulation.

Keywords

data communication; digital communication; orthogonal codes; variable length codes; Walsh code assignment; code reallocation; data structure; digital communication systems; dynamic variable- length Walsh code assignment; orthogonal variable spreading factor codes; variable data rate communications; variable-length Walsh codes; Availability; Binary phase shift keying; Communications Society; Data communication; Data structures; Digital communication; Heuristic algorithms; Modulation coding; Quadrature phase shift keying; Wireless communication;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/TCOMM.2008.050422

Filename

4471926