Analysis of Multipath Interference of SRAKE Receivers in UWB Systems

Author

Zhang, Jiaqi ; Xiao, Zhenyu ; Ge, Ning

Author_Institution

Sch. of Electron. Eng., Tsinghua Univ., Beijing, China

fYear

2010

fDate

16-19 May 2010

Firstpage

1

Lastpage

5

Abstract

This paper analyzes the interference in Direct Sequence Spreading Spectrum (DSSS) systems with Selective RAKE (SRAKE) receivers where channel delay is comparable with spreading sequence length. We build an accurate output model of SRAKE receiver and derive the output Signal to Interference-Noise Ratio (SINR) and Bit Error Rate (BER) of SRAKE receiver, taking multipath effect into consideration. Based on this analysis, we showed that in frequency selective channels with SRAKE receiver, system become interference limited as transmit power increases. Besides, there exists a critical spreading factor. When spreading factor is lower than this critical value, E_b/N₀ have to increase dramatically to compensate the multipath effect. This provide a criterion to adaptively choose the optimal spreading factor under different channel conditions.

Keywords

error statistics; multipath channels; radio receivers; spread spectrum communication; ultra wideband communication; BER; SRAKE receivers; Selective RAKE receivers; UWB systems; bit error rate; channel delay; direct sequence spreading spectrum systems; multipath interference analysis; signal to interference-noise ratio; Bit error rate; Delay; Diversity methods; Diversity reception; Fading; Interference; Power system modeling; RAKE receivers; Signal to noise ratio; Spread spectrum communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference (VTC 2010-Spring), 2010 IEEE 71st

Conference_Location

Taipei

ISSN

1550-2252

Print_ISBN

978-1-4244-2518-1

Electronic_ISBN

1550-2252

Type

conf

DOI

10.1109/VETECS.2010.5493906

Filename

5493906