Title :
Signalling wavelength in an antenna array for space-time wireless over LOS channels
Author :
Zhu, Guangran ; Petersen, Brent R. ; Colpitts, Bruce G.
Author_Institution :
Dept. of Electr. & Comput. Eng., New Brunswick Univ., Fredericton, NB, Canada
Abstract :
We consider the inter-antenna separation in a distributed antenna array. We introduce a new separation constraint with respect to the signalling wavelength, which equals the chip wavelength in DS-CDMA systems and the symbol wavelength in non-spread systems. This constraint ensures the phases of the frequency responses are exercised over 2π in the baseband channel matrix. The diverse phases provide a better channel matrix for signal detection. The multiuser performance improvement due to this constraint has been named as the signalling wavelength antenna placement (SWAP) gain.
Keywords :
antenna arrays; code division multiple access; frequency response; matrix algebra; radiocommunication; signal detection; spread spectrum communication; telecommunication channels; telecommunication signalling; DS-CDMA system; LOS channel; SWAP; baseband channel matrix; direct sequence code division multiple access; distributed antenna array; frequency response; inter-antenna separation; multiuser performance; signal detection; signalling wavelength antenna placement; space-time wireless; Antenna arrays; Antennas and propagation; Bandwidth; Baseband; Distributed computing; Fading; Frequency response; Receiving antennas; Scattering; Transmitting antennas;
Conference_Titel :
Communication Networks and Services Research Conference, 2005. Proceedings of the 3rd Annual
Print_ISBN :
0-7695-2333-1
DOI :
10.1109/CNSR.2005.58
