Downlink Strategies for MISO TDD MC-CDMA Systems
نویسندگان
چکیده
This paper propose two advanced space-frequency schemes with a pre-filtering technique for downlink time division duplex (TDD) MC-CDMA system. We consider the use of antenna arrays at the base station (BS) and a single antenna at the mobile terminal (MT). We derive a multi-user pre-filtering technique that allows to format the transmitted signals so that the multiple access interference at mobile terminals is completely removed and eliminating the channel deep fades, without enhancing the noise power and keeping the MT at low complexity. This pre-filtering technique is combined with the MC-CDMA and 2x1 SFBC MCCDMA systems. Simulations results are carried out in scenarios with spectral efficiency equal to 3 bps/Hz and using the UMTS channel turbo code, to demonstrate the effectiveness of the proposed advanced schemes.
منابع مشابه
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