Title :
A Power-Controlled 2-Dimensional Block Spread DS-CDMA Cellular System with Uplink Site Selection Diversity
Author :
Liu, Le ; Adachi, Fumiyuki
Author_Institution :
Tohoku Univ., Sendai
Abstract :
2-dimensional (2D) block spread direct sequence-code division multiple access (DS-CDMA) allows uplink mutli- rate/mutli-connection transmissions without causing a serious multi-access interference (MAI) in the presence of a frequency- selective fading channel. However, in a cellular system, the inter- cell interference remains. The site selection diversity (SSD) can be used to reduce the inter-cell interference and increase the uplink capacity. Furthermore, transmit power control (TPC) is necessary to combat the near-far problem. In this paper, we discuss the impact of SSD and TPC on the uplink capacity of 2D block spread DS-CDMA and compare it with those of conventional DS-CDMA and ID block spread DS-CDMA.
Keywords :
cellular radio; code division multiple access; diversity reception; fading channels; radio links; radiofrequency interference; spread spectrum communication; MAI; block spread DS-CDMA cellular system; direct sequence-code division multiple access; frequency-selective fading channel; inter-cell interference remains; multi-access interference; power-controlled 2-dimensional System; uplink capacity; uplink mutlirate mutliconnection transmissions; uplink site selection diversity; Fading; Frequency conversion; Frequency division multiaccess; Multiaccess communication; Multiple access interference; Multiuser detection; Power control; Power engineering and energy; Power system modeling; Signal to noise ratio;
Conference_Titel :
Vehicular Technology Conference, 2007. VTC-2007 Fall. 2007 IEEE 66th
Conference_Location :
Baltimore, MD
Print_ISBN :
978-1-4244-0263-2
Electronic_ISBN :
1090-3038
DOI :
10.1109/VETECF.2007.211
