The Maximum Processing Gain of the Spreading Signal in Multipath Fading Channels

Author

Ma, Wanzhi ; Wang, Jun ; Shen, Ying ; Tang, Youxi

Author_Institution

Nat. Key Lab. of Sci. & Technol. on Commun., Univ. of Electron. Sci. & Technol. of China, Chengdu, China

fYear

2011

fDate

18-20 April 2011

Firstpage

362

Lastpage

366

Abstract

Considering the joint algorithm of coherent detection and non-coherent detection, we focus on the maximum processing gain of spreading signal, which is 2-dimensional spread spectrum signal, relative to binary phase shift keying (BPSK) and transmitted in rich scattering multipath fading channels. In this paper, we first investigate the processing gain of spreading signal and analyze its expression. Then, by increasing signal bandwidth or symbol period infinitely, we obtain that the processing gain is bounded, and the maximum processing gain is determined by the channel parameters and the energy-per-bit to noise density ratio (E_b/N₀). By analysis and simulation, it is shown that the processing gain is not more than 30dB, when the spreading signal relative to BPSK, with E_b/N₀ 20dB, the maximum Doppler shift 100Hz, and the negative exponential factor 5E-6, is transmitted in rich scattering multipath fading channels.

Keywords

fading channels; phase shift keying; spread spectrum communication; 2-dimensional spread spectrum signal; binary phase shift keying; maximum processing gain; noncoherent detection; scattering multipath fading channels; spreading signal; Bandwidth; Binary phase shift keying; Coherence; Fading; Joints; Wireless communication; Rich scattering; processing gain; signal bandwidth; spreading signal; symbol period;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications and Mobile Computing (CMC), 2011 Third International Conference on

Conference_Location

Qingdao

Print_ISBN

978-1-61284-312-4

Type

conf

DOI

10.1109/CMC.2011.77

Filename

5931274