Transmission Strategies for MISO Downlink MC-CDMA Mobile Systems |
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Authors: | Adão Silva Atílio Gameiro |
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Affiliation: | (1) Department of Electrical and Electronic Engineering, Imperial College London, London, SW7 2AZ, UK |
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Abstract: | This paper proposes two space-frequency schemes with a multi-user pre-filtering technique for downlink (DL) multicarrier code
division multiple access (MC-CDMA) systems. We consider the use of antenna arrays at the base station (BS) and a single antenna
at the mobile terminal (MT) and derive the proposed multi-user pre-filtering technique that modulates the transmitted signal
to eliminate the effects of multiple access interference (MAI) and channel distortions at the mobile terminals, while maintaining
low MT complexity. Two types of detectors are considered at the MT: simple despreading and single user equalizers. The performances
of the proposed schemes are compared to those of other transmit signal design approaches that have been recently proposed
for DL MC-CDMA, considering both typical indoor and pedestrian scenarios, and channel coding based on UMTS specifications. |
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