Turbo coded CDMA multilayer system equipped with a pilot canceler for mobile communications

Author

Iwakiri, Naóhiko

Author_Institution

Mobile Telecommuns., YRP Key Technol. Res. Labs. Co. Ltd., Yokosuka, Japan

fYear

1999

fDate

6/21/1905 12:00:00 AM

Firstpage

691

Abstract

We considered a turbo coded DS-CDMA multilayer system equipped with a pilot canceler in mobile communications environment. The proposed system multiplexes data at different speeds using orthogonal codes. Besides, assigning 30% of a total transmission power to a pilot channel, stable synchronization and demodulation can be performed under a low Eb/No. The pilot canceler eliminates pilot channel in interference elements having simple construction. A turbo encoder/decoder has been improved to operate in the environment and has been equipped with a practical channel interleaver and deinterleaver with AGC. The results indicate that the proposed system is improved 2.0 to 4.6 dB larger coding gain at BER = 10^-5 than a DS-CDMA multilayer system with Viterbi (1995) decoder

Keywords

Rayleigh channels; code division multiple access; codecs; decoding; error statistics; interference suppression; land mobile radio; multiuser channels; radiofrequency interference; spread spectrum communication; synchronisation; turbo codes; AGC; Rayleigh selective fading environment; Viterbi decoder; channel deinterleaver; channel interleaver; coding gain; data multiplexing; demodulation; interference elements; mobile communications; orthogonal codes; pilot canceler; pilot channel; stable synchronization; total transmission power; turbo coded DS-CDMA multilayer system; turbo encoder/decoder; Bit error rate; Decoding; Demodulation; Gain; Interference cancellation; Interference elimination; Mobile communication; Multiaccess communication; Nonhomogeneous media; Turbo codes;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference, 1999. GLOBECOM '99

Conference_Location

Rio de Janeireo

Print_ISBN

0-7803-5796-5

Type

conf

DOI

10.1109/GLOCOM.1999.830148

Filename

830148