Title :
Space-Time Filtering for Parallel-Channel Reuse in UMTS Downlink Transmission
Author :
AlAmayreh, Ahmad ; Rahhal, Jamal
Author_Institution :
Electron. & Commun. Eng. Dept., Al Ahliyya Amman Univ., Amman, Jordan
Abstract :
In this paper we investigate limitations facing high rate transmission in the downlink of UMTS systems. A solution is proposed based on space-time filtering to allow parallel channel transmission and spreading code reuse. The optimum receiver is derived taking into consideration non-ideality in space-time filtering caused by channel estimation errors. Comparisons with ordinary CDMA receivers, based on dispreading the received sequence with the same code used for transmission, show significant performance enhancement in system capacity, especially at large number of utilized parallel channels and in the presence of high channel estimation errors.
Keywords :
3G mobile communication; channel estimation; code division multiple access; filtering theory; radio receivers; UMTS downlink transmission; channel estimation errors; ordinary CDMA receivers; parallel channel transmission; parallel-channel reuse; performance enhancement; space-time filtering; spreading code reuse; system capacity; 3G mobile communication; Channel estimation; Downlink; Filtering; Interference; Receivers; Throughput;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing (WiCOM), 2011 7th International Conference on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-6250-6
DOI :
10.1109/wicom.2011.6040242
