Title :
Coexistence of DS CDMA PCN and analog FM: performance degradation of the SSSC-FM channels due to spread spectrum overlay
Author :
Filis, K.G. ; Gupta, S.C.
Author_Institution :
Dept. of Electr. Eng., Southern Methodist Univ., Dallas, TX, USA
Abstract :
The spectrum overlay of a CDMA PCN on a preexisting narrowband, analog, corrupted by AWGN FM channel is considered. This overlay can increase communications capacity, within a geographical area, and spectral efficiency. The overlayed PCN is assumed to employ DS spreading, using maximal length pseudorandom sequences. The interference the FM channel experiences is estimated, and an extremely severe test is simulated using a PCN overlayed on a preexisting 600-channel SSSC-FM FDM microwave line-of-sight radio link. It is found that the interference caused by the PCN depends on the carrier frequency separation between the two systems, the power of the EM system, the length of the SS system pseudorandom sequences, and the data rate and power of the PCN users
Keywords :
code division multiple access; frequency division multiplexing; interference suppression; microwave links; personal communication networks; radiofrequency interference; spread spectrum communication; subcarrier multiplexing; telecommunication channels; 600-channel SSSC-FM FDM microwave line-of-sight radio link; DS CDMA PCN; DS spreading; EM system power; SSB suppressed carrier FDM channels; SSSC-FM channels; analog FM; carrier frequency separation; communications capacity; data rate; maximal length pseudorandom sequences; narrowband analog corrupted by AWGN FM channel; performance degradation; spectral efficiency; spread spectrum overlay; AWGN; Degradation; Interference; Microwave communication; Multiaccess communication; Narrowband; Personal communication networks; Radio link; Random sequences; Testing;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 1992. Proceedings, PIMRC '92., Third IEEE International Symposium on
Conference_Location :
Boston, MA
Print_ISBN :
0-7803-0841-7
DOI :
10.1109/PIMRC.1992.279850
