Title :
Multiuser cross-correlation channel estimation for SDMA/TDMA systems
Author :
Bartsch, E.K. ; Wassell, I.J.
Author_Institution :
Dept. of Eng., Cambridge Univ., UK
Abstract :
A computationally efficient method for constructing zero correlation zone (ZCZ) sequences from optimal channel sounding sequences, which maximizes the length of the zero correlation zone (Z-zone) is proposed. The method is based on cyclic shifting of optimum sounding sequences. The proposed ZCZ sequences are specifically designed for cross-correlation channel estimation for single input multiple output (SIMO) communication systems. Our ZCZ sequence set permits the estimation of M space division multiple access (SDMA) user channels using only one correlator loaded with the mother sequence. The mother sequence is defined as the first sequence in the set. Further we show how frame synchronization is achieved with the proposed ZCZ sequence set. The proposed method offers computationally efficient real-time cross-correlation channel estimation for SDMA/TDMA systems.
Keywords :
code division multiple access; correlation methods; diversity reception; fading channels; multiuser channels; parameter estimation; space division multiple access; spread spectrum communication; synchronisation; SDMA/TDMA systems; SIMO communication systems; ZCZ sequences; computationally efficient method; cyclic shifting; frame synchronization; frequency selective fading; mother sequence; multiple user channels; multiuser cross-correlation channel estimation; optimal channel sounding sequences; real-time cross-correlation channel estimation; single input multiple output communication systems; space division multiple access; zero correlation zone length; zero correlation zone sequences; Acoustical engineering; Autocorrelation; Base stations; Channel estimation; Frequency; Intersymbol interference; Multiaccess communication; Multiuser detection; Time division multiple access; Transmitting antennas;
Conference_Titel :
Signals, Systems and Computers, 2001. Conference Record of the Thirty-Fifth Asilomar Conference on
Conference_Location :
Pacific Grove, CA, USA
Print_ISBN :
0-7803-7147-X
DOI :
10.1109/ACSSC.2001.987785
