Spatial and Temporal Communication Theory Using Software Antennas for Wireless Communications

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.

[1]  Joseph Mitola,et al.  The software radio architecture , 1995, IEEE Commun. Mag..

[2]  B.D. Van Veen,et al.  Beamforming: a versatile approach to spatial filtering , 1988, IEEE ASSP Magazine.

[3]  J. Kennedy,et al.  Direction finding and "smart antennas" using software radio architectures , 1995 .

[4]  Stuart C. Schwartz,et al.  Integrated spatial-temporal detectors for asynchronous Gaussian multiple-access channels , 1995, IEEE Trans. Commun..

[5]  Hideki Imai,et al.  Combination of an Adaptive Array Antenna and a Canceller of Interference for Direct-Sequence Spread-Spectrum Multiple-Access System , 1990, IEEE J. Sel. Areas Commun..

[6]  D. L. Schilling,et al.  Wireless communications going into the 21st century , 1994 .

[7]  Bernard Mulgrew,et al.  Smart antenna arrays for CDMA systems , 1996, IEEE Wirel. Commun..

[8]  Ryuji Kohno,et al.  Performance Evaluation of Near-Far Resistant Receiver for DS/CDMA Cellular System over Fading Multipath Channel , 1995 .

[9]  Hideki Imai,et al.  Design of a directional diversity receiver using an adaptive array antenna , 1991 .

[10]  R. O. Schmidt,et al.  Multiple emitter location and signal Parameter estimation , 1986 .

[11]  R. Krenz,et al.  Comparison of several space diversity techniques for MLSE receivers in mobile communications , 1994, 5th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, Wireless Networks - Catching the Mobile Future..

[12]  Hideki Imai,et al.  Adaptive array antenna combined with tapped delay line using processing gain for spread-spectrum CDMA systems , 1992, [1992 Proceedings] The Third IEEE International Symposium on Personal, Indoor and Mobile Radio Communications.

[13]  L. B. Milstein,et al.  Spread spectrum access methods for wireless communications , 1995, IEEE Commun. Mag..

[14]  Preben E. Mogensen,et al.  A hardware testbed for evaluation of adaptive antennas in GSM/UMTS , 1996, Proceedings of PIMRC '96 - 7th International Symposium on Personal, Indoor, and Mobile Communications.

[15]  Naoto Ishii,et al.  Spatial and temporal equalization based on an adaptive tapped-delay-line array antenna , 1994, 5th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, Wireless Networks - Catching the Mobile Future..

[16]  Ryuji Kohno,et al.  Cancellation techniques of co-channel interference in asynchronous spread spectrum multiple access systems , 1983 .

[17]  Hideki Imai,et al.  Integrated Co-channel Interference Cancellation and Decoding Scheme over Fading Multipath Channel for CDMA , 1994 .

[18]  Ryuji Kohno,et al.  Cascaded combination of cancelling co-channel interference and decoding of error-correcting codes for CDMA , 1994, Proceedings of IEEE 3rd International Symposium on Spread Spectrum Techniques and Applications (ISSSTA'94).

[19]  Fumiyuki Adachi,et al.  Time division multiple access methods for wireless personal communications , 1995, IEEE Commun. Mag..

[20]  S. Qureshi,et al.  Adaptive equalization , 1982, Proceedings of the IEEE.

[21]  John G. Proakis,et al.  Adaptive maximum-likelihood sequence estimation for digital signaling in the presence of intersymbol interference (Corresp.) , 1973, IEEE Trans. Inf. Theory.

[22]  Hideki Imai,et al.  An Adaptive Canceller of Cochannel Interference for Spread-Spectrum Multiple-Access Communication Networks in a Power Line , 1990, IEEE J. Sel. Areas Commun..

[23]  Hideki Imai,et al.  Adaptive Array Antenna Based on Spatial Spectral Estimation Using Maximum Entropy Method (Special Issue on Adaptive Signal Processing in Mobile Radio Communications) , 1994 .

[24]  G. David Forney,et al.  Maximum-likelihood sequence estimation of digital sequences in the presence of intersymbol interference , 1972, IEEE Trans. Inf. Theory.

[25]  Sergio Verdú,et al.  Minimum probability of error for asynchronous Gaussian multiple-access channels , 1986, IEEE Trans. Inf. Theory.

[26]  R. T. Compton.  Adaptive Antennas: Concepts and Performance , 1988 .

[27]  Hideki Imai,et al.  Integrated receiver structure of staged decoder and CCI canceller for CDMA with multilevel coded modulation , 1995, Eur. Trans. Telecommun..