Title :
Performance of MIMO-extended UMTS-FDD downlink comparing space-time RAKE and linear equalizer
Author :
Burg, A. ; Rupp, M. ; Perels, D. ; Haene, S. ; Felber, N. ; Fichtner, W.
Author_Institution :
IIS, ETH-Zurich, Zurich, Switzerland
Abstract :
The paper discusses the performance of a MIMO-extended UMTS-FDD downlink with 2×2 and 4×4 antenna configurations. An analytical expression is derived for the average signal-to-interference ratio (SIR) of a space-time (ST) RAKE receiver in an interference dominated environment. Simulations are used to assess the BER performance with the number of concurrent users as a parameter. The results are compared to a single antenna link with equivalent data rate. In addition to that, a linear zero forcing (ZF) and an MMSE MIMO equalizer receiver are evaluated and compared to the ST-RAKE. It is shown that both methods can successfully mitigate the significant performance limitation due to self interference (SI) and multiple access interference (MAI).
Keywords :
3G mobile communication; MIMO systems; antenna arrays; equalisers; frequency division multiplexing; least mean squares methods; radio receivers; radio transmitters; radiofrequency interference; BER; MAI; MIMO-extended UMTS-FDD downlink; MMSE MIMO equalizer receiver; average SIR; average signal-to-interference ratio; linear equalizer; linear zero forcing equalizer; multiple access interference; self interference; space-time RAKE equalizer; space-time RAKE receiver; transmitter; Bit error rate; Downlink; Equalizers; Fading; MIMO; Multiaccess communication; Multiple access interference; Performance analysis; Signal analysis; Transmitters;
Conference_Titel :
Vehicular Technology Conference, 2003. VTC 2003-Fall. 2003 IEEE 58th
Print_ISBN :
0-7803-7954-3
DOI :
10.1109/VETECF.2003.1285062
