Title :
Joint optimization of spatial and temporal multi-user equalization in both transmitter and receiver using adaptive array antennas for DS/CDMA
Author :
Ishii, Naoto ; Kohno, Ryuji
Author_Institution :
Div. of Electr. & Comput. Eng., Yokohama Nat. Univ., Japan
Abstract :
We have already proposed the optimal receiver system based on an array antenna for DS/CDMA (direct sequence code division multiple access). In this paper, we propose an optimal multiuser system based on spatial and temporal equalization in both transmitter and receiver using adaptive array antennas for DS/CDMA. If we assume a two-way interactive communication such as time or frequency division duplex (TDD/FDD), the signal distortion due to ISI (intersymbol interference) and CCI (co-channel interference) will be reduced not only in the receiver side but also in the transmitter side by using precoding or partial response signaling (PRS). Computer simulations show the improvement of BER in the proposed system
Keywords :
adaptive antenna arrays; cochannel interference; code division multiple access; equalisers; error statistics; interference suppression; intersymbol interference; land mobile radio; optimisation; partial response channels; pseudonoise codes; radio receivers; radio transmitters; radiofrequency interference; spread spectrum communication; BER improvement; CCI; DS-CDMA; ISI; TDD/FDD; adaptive array antennas; co-channel interference; computer simulations; direct sequence code division multiple access; frequency division duplex; intersymbol interference; multi-user equalization; optimal multiuser system; optimization; partial response signaling; precoding; receiver; signal distortion; spatial equalization; temporal equalization; time division duplex; transmitter; two-way interactive communication; Adaptive arrays; Adaptive equalizers; Antenna arrays; Direct-sequence code-division multiple access; Frequency conversion; Intersymbol interference; Multiaccess communication; Receiving antennas; Transmitters; Transmitting antennas;
Conference_Titel :
Global Telecommunications Conference, 1996. GLOBECOM '96. 'Communications: The Key to Global Prosperity
Conference_Location :
London
Print_ISBN :
0-7803-3336-5
DOI :
10.1109/GLOCOM.1996.586796