DocumentCode :
341562
Title :
Downlink performance analysis of a CDMA mobile radio system with chirp modulation
Author :
Kocian, Alexander ; Dahlhaus, Dirk
Author_Institution :
Center for PersonKommunikation, Aalborg Univ., Denmark
Volume :
1
fYear :
1999
fDate :
36342
Firstpage :
238
Abstract :
A concept of an air interface for the downlink of an indoor mobile radio system with code-division multiple access (CDMA) based on chirp modulation is presented. A homogenous occupation of the total available bandwidth can be guaranteed for arbitrary signature sequences of the different users. A cost-efficient noncoherent demodulation scheme is presented and analyzed in terms of the bit-error rates for both frequency-nonselective and frequency-selective transmission channels. The analog signal processing includes chirp matched filtering and a post-detection integration, while the code correlation is carried out in the digital domain. Monte-Carlo simulations of a typical application, like, for example, the auto-identification with active microwave tags in the car industry, indicate that the scheme is robust against multiple-access interference and able to overcome the problem of frequency-selective fading
Keywords :
Monte Carlo methods; chirp modulation; code division multiple access; correlation methods; demodulation; error statistics; fading channels; filtering theory; indoor radio; land mobile radio; matched filters; microwave links; multiuser channels; radiofrequency interference; CDMA mobile radio system; Monte-Carlo simulations; active microwave tags; air interface; analog signal processing; auto-identification; bit-error rates; car industry; chirp matched filtering; chirp modulation; code correlation; code-division multiple access; cost-efficient noncoherent demodulation; digital domain; downlink performance analysis; frequency-nonselective transmission channel; frequency-selective fading; frequency-selective transmission channel; indoor mobile radio system; multiple-access interference; post-detection integration; signature sequences; total available bandwidth; Bandwidth; Bit error rate; Chirp modulation; Demodulation; Digital signal processing; Downlink; Frequency; Land mobile radio; Multiaccess communication; Performance analysis;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Vehicular Technology Conference, 1999 IEEE 49th
Conference_Location :
Houston, TX
ISSN :
1090-3038
Print_ISBN :
0-7803-5565-2
Type :
conf
DOI :
10.1109/VETEC.1999.778053
Filename :
778053
Link To Document :
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