Title :
The CDMA overlay concept
Author :
Milstein, Laurence B. ; Schilling, Donald L.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., San Diego, La Jolla, CA, USA
Abstract :
We present an overview of the results which have been obtained on the concept of allowing wideband code division multiple access (CDMA) waveforms to share a common spectrum with conventional, narrowband signals. Such sharing of the frequency spectrum is referred to as a CDMA overlay, and has the potential of enhancing the overall spectral efficiency. The overlay has been demonstrated in both the PCS band and the cellular band. It is also shown that such an overlay could be successfully accomplished either by employing tunable notch filters in the transmitters and receivers of the CDMA units, or by using a multicarrier CDMA waveform
Keywords :
code division multiple access; filtering theory; notch filters; personal communication networks; CDMA overlay; PCS band; cellular band; code division multiple access; frequency spectrum sharing; multicarrier CDMA waveform; narrowband signals; spectral efficiency; tunable notch filters; wideband CDMA waveforms; Bandwidth; Filters; Frequency; Interference; Multiaccess communication; Narrowband; Power control; Testing; Transmitters; Wideband;
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.1996.563173
