Title :
The effects of odd-correlation and band-limitation in broadband spread-spectrum direct-wave reception systems
Author :
Hamamura, Masanori ; Tachikawa, Shin´ichi
Author_Institution :
Fac. of Eng., Nagaoka Univ. of Technol., Niigata, Japan
Abstract :
In this paper, we describe effects of odd-correlation functions and band-limitation filters for a direct-wave reception system using broadband spread-spectrum techniques. The effects of odd-correlation functions are investigated by using M-sequences and random sequences, and the effects of band-limitation filters are examined by using four kinds of filters. In the band-limitation examinations, we show the characteristics in the case that band-limited despreading sequences or rectangular despreading sequences are used at the correlator in the receiver. Consequently, we notice the advantage of using M-sequences as the spreading sequence considering the effects of odd-correlation functions and the advantage of the rectangular wave-form as the despreading sequence considering the band-limitations
Keywords :
band-stop filters; broadband networks; correlation methods; land mobile radio; radio receivers; random processes; sequences; spread spectrum communication; M-sequences; band-limitation filters; band-limited despreading sequences; broadband spread-spectrum direct-wave reception systems; correlator; despreading sequences; odd-correlation; random sequences; receiver; rectangular despreading sequence; rectangular wave-form; Correlators; Degradation; Distortion; Fading; Filters; Frequency; Mobile communication; Radio transmitters; Random sequences; Spread spectrum communication;
Conference_Titel :
Spread Spectrum Techniques and Applications Proceedings, 1996., IEEE 4th International Symposium on
Conference_Location :
Mainz
Print_ISBN :
0-7803-3567-8
DOI :
10.1109/ISSSTA.1996.563777
