Title :
Downlink capacity of high altitude Platforms CDMA system in ricean channel
Author :
Jun, Wang ; Yi Ke-Chu ; Bin, Tian
Author_Institution :
State Key Lab. of Integrated Service Networks, Xidian Univ., Xi´´an, China
Abstract :
High altitude Platforms (HAPs) are known as a new means to provide high quality broadband applications and CDMA based IMT-2000 (3G) wireless service. For the capacity estimation of HAPs system, most previous work was restricted to the additive white Gaussian noise (AWGN) channels neglecting the effect of multipath fading. In this paper, we investigate the downlink capacity of HAPs CDMA system in ricean fading channel. The downlink multiple access interference for HAPs CDMA system in ricean channel is derived with Gaussian approximation method. Then the downlink capacity which is related to the antenna array gain patterns, the required Eb/I0 and the CDMA processing gain is obtained. The results show that the downlink capacity decreases dramatically when the elevation decreases.
Keywords :
AWGN; Gaussian processes; antenna arrays; antenna radiation patterns; channel capacity; code division multiple access; fading channels; telecommunication channels; AWGN channels; CDMA system; Gaussian approximation method; IMT-2000 3G wireless service; additive white Gaussian noise channels; antenna array gain patterns; downlink capacity; downlink multiple access interference; high altitude platforms; multipath fading; ricean fading channel; AWGN; Additive white noise; Antenna arrays; Downlink; Fading; Intserv networks; Multiaccess communication; Phased arrays; Power control; Satellite broadcasting; CDMA; Capacity; HAPs; Ricean;
Conference_Titel :
Computer and Automation Engineering (ICCAE), 2010 The 2nd International Conference on
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-5585-0
Electronic_ISBN :
978-1-4244-5586-7
DOI :
10.1109/ICCAE.2010.5451833
