Title :
MISO antenna array OC pre-RAKE transmitter with MRC post-RAKE receiver
Author :
Burke, J.P. ; Rao, B.D. ; Zeidler, J.R.
Author_Institution :
Center for Wireless Commun., Univ. of California San Diego, La Jolla, CA, USA
Abstract :
The optimal independent space independent time (ISIT) pre-correction transmit equalizer solution is derived for a multiple-in single-out (MISO) antenna array wireless communication system using an input referred noise model. A combined time division multiplexed (TDM) spread spectrum (SS) system is analyzed. Using knowledge of the channel state, the transmit equalizer solution combats frequency selective channel induced multipath (MP) interchip interference (ICI). The time invariant subset of the optimal ISIT solution is defined equal to the optimal combining (OC) pre-RAKE equalizer. The maximum of the OC pre-RAKE weights is proposed as a spatial only transmit weight, suitable for a multiuser CDMA downlink, and compared to a weight based upon the maximum eigenmode of the channel state. Bit error rate (BER) simulations illustrate that pre-correction weights derived from the optimal ISIT solution outperform the maximal ratio combining (MRC) pre-RAKE and the eigenmode based solution.
Keywords :
antenna arrays; antenna radiation patterns; array signal processing; code division multiple access; diversity reception; eigenvalues and eigenfunctions; equalisers; error statistics; multipath channels; radio receivers; radio transmitters; radiofrequency interference; random noise; spread spectrum communication; time division multiplexing; BER; MISO antenna array; MRC post-RAKE receiver; OC pre-RAKE transmitter; SS system; TDM system; beam patterns; channel state; frequency selective interference; independent space independent time solution; interchip interference; maximal ratio combining; maximum eigenmode; multipath interference; multiuser CDMA downlink; optimal combining equalizer; pre-correction transmit equalizer; selection diversity; spread spectrum system; time division multiplexed system; Antenna arrays; Bit error rate; Diversity reception; Equalizers; Receiving antennas; Spread spectrum communication; Time division multiplexing; Transmitters; Transmitting antennas; Wireless communication;
Conference_Titel :
Signals, Systems and Computers, 2002. Conference Record of the Thirty-Sixth Asilomar Conference on
Conference_Location :
Pacific Grove, CA, USA
Print_ISBN :
0-7803-7576-9
DOI :
10.1109/ACSSC.2002.1197065
