CODSIM-a simulation environment for spreading codes

Author

Kärkkäinen, Kari H A

Author_Institution

Dept. of Electr. Eng., Oulu Univ., Finland

fYear

1994

fDate

8-10 Jun 1994

Firstpage

535

Abstract

An interactive software for analytical simulation of spreading codes used in direct-sequence (DS) code-division multiple-access (CDMA) systems is introduced. The spreading code simulation (CODSIM) environment also supports the design of radar waveforms. It generates the most commonly used binary pseudo-noise (PN) sequence families of a large range of periods. Gold, Kasami, maximum length and nonlinear feedforward logic (NLFFL) sequences ore included, in addition to Kronecker and combination sequences of arbitrary components. Barker and Golay complementary sequences are included for radar applications. CODSIM also calculates a number of correlation and ambiguity functions, power spectrum density envelopes, run distribution histograms of binary symbols and linear complexity profiles, in addition to several merit factors and performance measures to characterize the quality of the spreading code design. Calculation of correlation functions is speeded up by the use of the fast Fourier transform (FFT) method. CODSIM runs on computers that are compatible with PRO-MaTLAB^TM

Keywords

binary sequences; correlation methods; digital simulation; fast Fourier transforms; feedforward; pseudonoise codes; software packages; spread spectrum communication; spread spectrum radar; telecommunication computing; Barker sequences; CODSIM environment; FFT; Golay complementary sequence; Gold sequences; Kasami sequences; Kronecker sequences; ambiguity functions; analytical simulation; binary pseudo-noise sequence; code-division multiple-access; combination sequences; correlation functions; direct-sequence CDMA; interactive software; maximum length sequences; nonlinear feedforward logic sequences; power spectrum density envelopes; radar applications; radar waveforms design; simulation environment; spreading code simulation; Analytical models; Application software; Computational modeling; Frequency conversion; Frequency division multiaccess; Multiaccess communication; Numerical analysis; Personal communication networks; Radio spectrum management; Spread spectrum radar;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1994 IEEE 44th

Conference_Location

Stockholm

ISSN

1090-3038

Print_ISBN

0-7803-1927-3

Type

conf

DOI

10.1109/VETEC.1994.345069

Filename

345069