Title :
Data throughput enhancement by frequency selectivity suppression in downlink DS-CDMA beamforming systems
Author :
Kim, J.W. ; Sampei, Seiichi ; Morinaga, N.
Author_Institution :
Dept. of Commun. Eng., Osaka Univ., Japan
Abstract :
A novel multi-transmit and multi-receive (MTMR) adaptive array antenna (AAA) system combined with analogue-type transmit power control (TPC) to suppress channel frequency selectivity is proposed. This technique increases throughput with adaptive modulation and coding (AMC) employed at the downlink of direct-sequence code division multiple access (DS-CDMA) systems. The proposed scheme employs beam directivity control using a path manipulation technique. Its superiority over the conventional AAA systems is demonstrated by computer simulation.
Keywords :
adaptive antenna arrays; adaptive codes; adaptive modulation; array signal processing; code division multiple access; frequency selective surfaces; multifrequency antennas; multipath channels; radio links; receiving antennas; spread spectrum communication; transmitting antennas; DS-CDMA systems; adaptive array antenna system; adaptive coding; adaptive modulation; analogue type transmit power control; beam directivity control; channel frequency selectivity suppression; code division multiple access systems; computer simulation; data throughput enhancement; direct sequence beamforming systems; multiple receive antennas; multiple transmit antennas; path manipulation technique; radio links;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20046630
