Spatial and Temporal Communication Theory Using Software Antennas for Wireless Communications

  • Ryuji Kohno


An adaptive array antenna or a kind of smart antenna is named a software antenna because it can programably form a desired beam pattern in flexible if an appropriate set of antenna weights is provided in software. It must be a typical tool for realizing a software radio. I consider it as an adaptive filter in space and time domains for radio communications, so that the communication theory can be generalized from a comventional time domain into both space and time domains. This paper introduces a spatial and temporal communication theory based on a software antenna, such as spatial and temporal channel modeling, equalization, optimum detection for a single user and multiuser for CDMA, precoding and joint optization of both a transmitter and a receiver. Such spatial and temporal processing promises drastic improvement of performance as a practical countermeasure for multipath fading in mobile radio communications.


Array Antenna Antenna Element Smart Antenna Space Division Multiple Access Symbol Error Probability 
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© Springer Science+Business Media Dordrecht 1997

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  • Ryuji Kohno

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