Title :
A new multi-code high speed mobile radio transmission scheme using cyclic modified M-sequence
Author :
Haroshi, H. ; Wu, Gang ; Taira, Kazumasa ; Hase, Yoshihiro ; Sasaoka, Hideichi
Author_Institution :
Commun. Res. Lab., Minist. of Posts & Telecommun., Tokyo, Japan
Abstract :
This paper proposes a new parallel transmission scheme using cyclic codes generated from a modified M-sequence, which is biased with constant direct current (DC) on an M-sequence and inserted the guard chips before and after this biased M-sequence. In the proposed system, the orthogonality of the codes is kept not only between parallel transmission channels but also between direct and delayed waves within guard chips. The bit error rate (BER) performance was evaluated by computer simulations. As a result, the proposed system can transmit several Mbps in the high speed double spike Rayleigh fading channel with better quality in comparison with conventional multi-code CDM transmission
Keywords :
Rayleigh channels; binary sequences; coding errors; cyclic codes; error statistics; fading; land mobile radio; multimedia communication; multipath channels; BER performance; Rayleigh fading channel; biased M-sequence; bit error rate; code orthogonality; computer simulations; constant direct current; cyclic codes; cyclic modified M-sequence; delayed waves; direct waves; guard chips; multi-code CDM transmission; multi-code high speed mobile radio transmission; multimedia mobile communication; multipath propagation; parallel transmission; parallel transmission channels; Bit error rate; Bit rate; Broadband communication; Delay effects; Fading; Frequency division multiplexing; Land mobile radio; Mobile communication; Multimedia communication; Propagation delay;
Conference_Titel :
Vehicular Technology Conference, 1997, IEEE 47th
Conference_Location :
Phoenix, AZ
Print_ISBN :
0-7803-3659-3
DOI :
10.1109/VETEC.1997.605850
