Title :
Feasibility study on DS-CDMA/TDMA frequency sharing system
Author :
Matsuda, Takahiro ; Hara, Shinsuke ; Morinaga, Norihiko
Author_Institution :
Graduate Sch. of Eng., Osaka Univ., Japan
Abstract :
In this paper, we discuss the co-existence of DS-CDMA and TDMA systems where both systems share the same frequency band to improve the spectral efficiency. We evaluate the capacity of a DS-CDMA/(frequency-multiplexed) TDMA frequency sharing system, and show that the system can provide a greater capacity than a single multiple access scheme-based system such as DS-CDMA or TDMA, when we employ an active narrowband interference rejection technique for the TDMA signals. The rejection of the narrowband TDMA signals can significantly improve the bit error rate performance of the CDMA system and total capacity of co-existence
Keywords :
channel capacity; code division multiple access; error statistics; frequency division multiplexing; interference suppression; land mobile radio; notch filters; radiofrequency interference; spread spectrum communication; time division multiple access; DS-CDMA/TDMA frequency sharing system; active narrowband interference rejection technique; bit error rate performance; capacity; feasibility study; frequency band; frequency-multiplexing; notch filtering; spectral efficiency; Bandwidth; Bit error rate; Degradation; Filtering; Frequency; Interference; Multiaccess communication; Narrowband; Spread spectrum communication; Time division multiple access;
Conference_Titel :
Communications, 1997. ICC '97 Montreal, Towards the Knowledge Millennium. 1997 IEEE International Conference on
Conference_Location :
Montreal, Que.
Print_ISBN :
0-7803-3925-8
DOI :
10.1109/ICC.1997.610024
