Title :
Power considerations for DS/CDMA personal communication systems (PCS)
Author :
Mokhtar, M.A. ; Gupta, S.C.
Author_Institution :
Dept. of Electr. Eng., Southern Methodist Univ., Dallas, TX, USA
Abstract :
Spread-spectrum direct sequence/code division multiple access (DS/CDMA) is a promising technique for personal communication systems (PCS) because of its superiority over both FDMA and TDMA. However, DS/CDMA suffers from the near-far problem. Thus, adaptive power control (APC) of the transmitted signal is needed to perform at reasonable efficiency. This requires the simultaneous recording of the performance degradation caused by multipath fading and interference from other users. A model for the DS/CDMA PCS is studied in a Nakagami fading channel, and the probability of error at the base station, along with its upper bounds is evaluated. The results will aid in designing effective and sufficient adaptive power control schemes, and in evaluating the required amount of power needed by each portable set to achieve a reasonable quality in the received signal
Keywords :
code division multiple access; error statistics; fading; personal communication networks; radiofrequency interference; spread spectrum communication; DS/CDMA personal communication systems; Nakagami fading channel; PCS; adaptive power control; error probability; interference; multipath fading; performance degradation; spread spectrum communication; transmitted signal; Adaptive control; CD recording; Fading; Frequency division multiaccess; Multiaccess communication; Personal communication networks; Power control; Programmable control; Spread spectrum communication; Time division multiple access;
Conference_Titel :
Vehicular Technology Conference, 1992, IEEE 42nd
Conference_Location :
Denver, CO
Print_ISBN :
0-7803-0673-2
DOI :
10.1109/VETEC.1992.245385
