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Abstract
The scarcity of available radio spectrum presently limits the extension of modern multimedia systems. This paper presents a theoretical investigation into the possibility of using a frequency overlay of a narrowband Code Division Multiple Access (CDMA) System and a Time Division Multiple Access (TDMA) System to provide a greater spectral efficiency. This paper shows that under certain conditions the two systems can operate in the same frequency band and in the same area with a considerable improvement in the overall capacity of the whole system.
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References
- Grieco, D. and Schilling, D., 1994, "The Capacity of Broadband CDMA Overlaying a GSM Cellular Systems," IEEE 44th Vehicular Technology Conference, Vol. 1, pp. 31-35.
- Himimy, H.H. and Gupta, S.C., 1996, "Overlay of Cellular CDMA or AMPS Forward and Reverse Link," IEEE Transactions on Vehicular Technology, Vol. 45(1), pp. 51-56.
- Koorevaar, P. and Ruprecht, J., 1999, "Frequency Overlay of GSM and Cellular B-CDMA," IEEE
- Transaction on Vehicular Technology, Vol. 48(3), pp. 696-707.
- Latchman, P. and Chitamu, P., 2003, " The Study of Band Sharing for GSM 900 and CDMA 2000 1X Coexistence within the 900 MHz Cellular Band," www.ee.wits.ac.za / ~ comms/.
- Pabst, R. and Seidenberg, P., 2001, "Coexistence of UMTS and EGPRS to Enhance Network Capacity," Proc. of the 10th Aachen Symposium on Signal Theory, Germany, pp. 43-48.
- Schilling, D., Lomp, G.R. and J. Garodnick, 1993, " Broadband CDMA Overlay," IEEE 43rd Vehicular Technology Conference, pp. 452-455.
- Sinha, R., 1997, "Spread Spectrum Interference Issues in
- the 900 MHz ISM Band," M.Sc. Thesis, the State University of New Jersey, USA.
- Widdowson, T., 1997, "A CDMA Data Overlay of the GSM Network", IEEE - PIMRC, pp. 160-163
References
Grieco, D. and Schilling, D., 1994, "The Capacity of Broadband CDMA Overlaying a GSM Cellular Systems," IEEE 44th Vehicular Technology Conference, Vol. 1, pp. 31-35.
Himimy, H.H. and Gupta, S.C., 1996, "Overlay of Cellular CDMA or AMPS Forward and Reverse Link," IEEE Transactions on Vehicular Technology, Vol. 45(1), pp. 51-56.
Koorevaar, P. and Ruprecht, J., 1999, "Frequency Overlay of GSM and Cellular B-CDMA," IEEE
Transaction on Vehicular Technology, Vol. 48(3), pp. 696-707.
Latchman, P. and Chitamu, P., 2003, " The Study of Band Sharing for GSM 900 and CDMA 2000 1X Coexistence within the 900 MHz Cellular Band," www.ee.wits.ac.za / ~ comms/.
Pabst, R. and Seidenberg, P., 2001, "Coexistence of UMTS and EGPRS to Enhance Network Capacity," Proc. of the 10th Aachen Symposium on Signal Theory, Germany, pp. 43-48.
Schilling, D., Lomp, G.R. and J. Garodnick, 1993, " Broadband CDMA Overlay," IEEE 43rd Vehicular Technology Conference, pp. 452-455.
Sinha, R., 1997, "Spread Spectrum Interference Issues in
the 900 MHz ISM Band," M.Sc. Thesis, the State University of New Jersey, USA.
Widdowson, T., 1997, "A CDMA Data Overlay of the GSM Network", IEEE - PIMRC, pp. 160-163