A new demodulation procedure for CDMA systems based on complete complementary codes

Author

Mayuzumi, Ryusuke ; Kojima, Tetsuya

Author_Institution

Tokyo Nat. Coll. of Technol., Tokyo, Japan

fYear

2009

fDate

19-23 Oct. 2009

Firstpage

122

Lastpage

125

Abstract

Signal design methods for the approximately synchronized CDMA systems based on complete complementary codes have been proposed. It has been shown that both the information transmission rate and the frequency usage rate can be increased in these kinds of CDMA systems. The bit error rate (BER) properties of these systems have been also reported recently. However, it´s not been considered sufficiently why bit errors occur. In this paper, we analyze the bit error distribution and discuss the cause of bit errors in these systems. In addition, we propose the effective demodulation scheme to decrease bit errors and compare the BER performances of the proposed method with that of the original demodulation scheme of CDMA systems using complete complementary codes through some numerical simulations.

Keywords

code division multiple access; codes; demodulation; error statistics; BER performances; bit error distribution; bit error rate; complete complementary codes; demodulation procedure; frequency usage rate; information transmission rate; numerical simulation; synchronized CDMA systems; Bit error rate; Demodulation; Educational institutions; Error analysis; Fading; Frequency synchronization; Multiaccess communication; Numerical simulation; Performance analysis; Signal design; CDMA; bit error distribution; bit error rate; complete complementary codes;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Design and its Applications in Communications, 2009. IWSDA '09. Fourth International Workshop on

Conference_Location

Fukuoka

Print_ISBN

978-1-4244-4379-6

Electronic_ISBN

978-1-4244-4380-2

Type

conf

DOI

10.1109/IWSDA.2009.5346409

Filename

5346409