Exploitation of the Properties of Communication Signals: From Non-circular Signal to Circular Signal
HAL (Le Centre pour la Communication Scientifique Directe)(2021)
摘要
This chapter gives a brief introduction to the recent work on the exploitation of signals’
properties, including the non circularity, the cyclostationarity, the conjugate symmetry in
array signal processing. Besides in DoA estimation, the non circularity is exploited in
signal detection/demodulation in MIMO communication system; and this property is
further utilized in the MIMO-NOMA downlink system to jointly eliminate or control the
intra/inter-cluster interferences. The cyclostationarity is used for filtering out the
interferences with cycle frequencies distinct from the desired signals to enhance the
performance of DoA estimation or beamforming. The non circularity can be considered
as a special case of the conjugate symmetry, which exhibits in the general linearly
modulated digital signals. Therefore, the non circularity exploiting method can be
extended to the exploitation of conjugate symmetry, which can be equally applied in DoA
estimation and signal detection/demodulation.
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关键词
communication signals,non-circular
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