Title :
On the use of notch filters and ordered co-channel TDMA slots strategies to the TDMA and CDMA overlaid systems
Author :
Castañeda-Camacho, Josefina ; Lara-Rodríguez, Domingo
Author_Institution :
Electr. Eng. Dept., CINVESTAV-IPN, San Pedro Zacatenco, Mexico
Abstract :
CDMA and TDMA overlay has been investigated as a way to take advantage of the bandwidth available in narrowband systems. It has been demonstrated that without notch filters and ordered co-channel TDMA slots strategies, CDMA and TDMA coexistence cannot be achieved in practical situations. The use of notch filtering rejects only part of the intracell interference generated from the TDMA system but the ordered co-channel TDMA slots strategies decrease the intercell interference which could not be rejected by the filters. We have considered that the two systems share the same frequency bandwidth and power control on both layers. The performance of the overlaid system has been analyzed in the CDMA and TDMA layers in terms of blocking probability and outage probability.
Keywords :
Markov processes; code division multiple access; filtering theory; interference suppression; notch filters; probability; radiofrequency interference; time division multiple access; CDMA-TDMA overlay; Markov chain model; blocking probability; cochannel TDMA slots strategies; frequency bandwidth; intercell interference; intracell interference; narrowband systems; notch filters; outage probability; power control; Bandwidth; Filtering; Filters; Frequency; Interference; Multiaccess communication; Narrowband; Performance analysis; Power control; Time division multiple access;
Conference_Titel :
Wireless Communications and Networking Conference, 2005 IEEE
Print_ISBN :
0-7803-8966-2
DOI :
10.1109/WCNC.2005.1424910
