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Zero Forcing and Decision Feedback Detectors in MIMO Communication Channels and Their Applications to Frequency-Overlapped Multi-Carrier Signaling

Tadashi MATSUMOTO

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Summary :

This paper investigates noise enhancement factors of a zero-forcing detector and a decision feedback detector for synchronous Multiple Input Multiple Output (MIMO) channels. It is first shown that the zero-forcing and decision feedback detectors can be implemented in a vector digital filter form, and the noise enhancement factors with the detectors can easily be calculated by using the vector digital filter form. This paper then applies the zero-forcing and decision feedback detectors to the signal detection of a frequency-overlapped multicarrier signaling (FOMS) system. The normalized noise enhancement factor, which is given as a product of the noise enhancement and bandwidth reduction factors, is shown to be smaller with the decision feedback detector than the zero-forcing detector. Results of computer simulations conducted to evaluate bit error rate (BER) performances with the two detectors are also shown together with the BER performance with a conventional channel-by-channel detector.

Publication
IEICE TRANSACTIONS on Communications Vol.E83-B No.10 pp.2386-2393
Publication Date
2000/10/25
Publicized
Online ISSN
DOI
Type of Manuscript
PAPER
Category
Terrestrial Radio Communications

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