Title :
Sum capacity of the OCDMA/OCDMA signature sequence set
Author :
Vanhaverbeke, Frederik ; Moeneclaey, Marc
Author_Institution :
Dept. of Telecommun. & Inf. Process., Ghent Univ., Belgium
Abstract :
The sum capacity of the OCDMA/OCDMA (O/O) signature sequence set is investigated under the assumption of equal average-input-energy constraints and perfect synchronization of the users. It is shown that the spectral efficiency of the O/O signature sequence set is only dependent on the SNR and load, but independent of the choice of the orthogonal bases. Moreover, this sequence set is found to be only slightly less efficient in terms of sum capacity than the Welch-bound equality sequences.
Keywords :
channel capacity; code division multiple access; multiuser channels; sequences; spectral analysis; spread spectrum communication; O/O signature sequence set; OCDMA/OCDMA signature sequence set; SNR; Welch-bound equality sequences; code-division multiple access; direct-sequence spread-spectrum; equal average-input-energy constraints; orthogonal bases; perfect synchronization; spectral efficiency; sum capacity; Additive white noise; Channel capacity; Information processing; Modulation coding; Multiaccess communication; Propagation losses; Scalability; Spread spectrum communication;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2002.802039
