Title :
A general scheme for spectral efficiency evaluation of direct-sequence spread-spectrum systems
Author :
Bystrom, Maja ; Modestino, James W.
Author_Institution :
Dept. of Electr. & Comput. Eng., Drexel Univ., Philadelphia, PA, USA
fDate :
7/1/2001 12:00:00 AM
Abstract :
Typically, spectral efficiency, the throughput in bits/second/hertz, has been evaluated for fixed values of the bit error probability. We introduce a cutoff-rate-based approach to evaluation of the spectral efficiency of direct-sequence spread-spectrum schemes so that the results are independent of specific bit error rates or channel codes. Results are shown for M-ary phase-shift keyed modulation on the slow-fading Rician channel
Keywords :
Rician channels; error statistics; land mobile radio; phase shift keying; radiofrequency interference; spectral analysis; spread spectrum communication; time-varying channels; M-ary phase-shift keyed modulation; bit error probability; bit error rates; channel codes; cutoff-rate-based approach; direct-sequence spread-spectrum systems; interference; mobile channels; slow-fading Rician channel; spectral efficiency evaluation; throughput; time-varying fading levels; Additive white noise; Bit error rate; Error probability; Fading; Gaussian noise; Interference; Multiaccess communication; Rician channels; Spread spectrum communication; Throughput;
Journal_Title :
Communications, IEEE Transactions on
