Title :
Evaluation of optimum diversity combining in DECT
Author :
Wigard, Jeroen ; Mogensen, Preben E. ; Frederiksen, Frank ; Norklit, Ole
Author_Institution :
Center for Personkommunikation, Aalborg Univ., Denmark
Abstract :
Optimum diversity combining in a wireless communications system using TDMA/TDD is considered. By the use of optimum diversity combining a receiving antenna array is able to suppress interference and thus the capacity of the system is increased. The results in this paper are obtained by simulations. In the simulations a DECT-like system is used as the TDMA/TDD system. The results show that in the uplink direction M-1 interferers can be suppressed by an M element array. However the downlink transmit diversity performance is much worse, due to the changes in the radio channel during the dwell time between the uplink and downlink burst. That is the reason why it is concluded that optimum diversity combining is only useful for a TDD system with a short dwell time
Keywords :
antenna arrays; cordless telephone systems; diversity reception; interference suppression; land mobile radio; radio links; radiofrequency interference; receiving antennas; telephony; time division multiple access; time division multiplexing; DECT; TDMA/TDD; downlink burst; downlink transmit diversity performance; dwell time; interference suppression; optimum diversity combining; radio channel; receiving antenna array; simulations; system capacity; uplink; uplink burst; wireless communications system; Antenna arrays; Bandwidth; Bit rate; Cities and towns; Diversity reception; Downlink; Interference suppression; Receiving antennas; Time division multiple access; Wireless communication;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 1995. PIMRC'95. Wireless: Merging onto the Information Superhighway., Sixth IEEE International Symposium on
Conference_Location :
Toronto, Ont.
Print_ISBN :
0-7803-3002-1
DOI :
10.1109/PIMRC.1995.480920
