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Multichannel time-reversal processing for acoustic communications in a highly reverberant environment
- Source :
- The Journal of the Acoustical Society of America. 118:2339-2354
- Publication Year :
- 2005
- Publisher :
- Acoustical Society of America (ASA), 2005.
-
Abstract
- The development of time-reversal (T/R) communication systems is a recent signal processing research area dominated by applying T/R techniques to communicate in hostile environments. The fundamental concept is based on time-reversing the impulse response or Green's function characterizing the uncertain communications channel to mitigate deleterious dispersion and multipath effects. In this paper, we extend point-to-point to array-to-point communications by first establishing the basic theory to define and solve the underlying multichannel communications problem and then developing various realizations of the resulting T/R receivers. We show that not only do these receivers perform well in a hostile environment, but they also can be implemented with a "1 bit" analog-to-digital converter design structure. We validate these results by performing proof-of-principle acoustic communications experiments in air. It is shown that the resulting T/R receivers are capable of extracting the transmitted coded sequence from noisy microphone array measurements with zero-bit error.
- Subjects :
- Signal processing
Reverberation
Sequence
Time Factors
Acoustics and Ultrasonics
Computer science
Communication
Acoustics
Function (mathematics)
Environment
Communications system
Arts and Humanities (miscellaneous)
Dispersion (optics)
Electronic engineering
Humans
Transient response
Noise
Impulse response
Multipath propagation
Communication channel
Subjects
Details
- ISSN :
- 00014966
- Volume :
- 118
- Database :
- OpenAIRE
- Journal :
- The Journal of the Acoustical Society of America
- Accession number :
- edsair.doi.dedup.....8460cf46627ac9e10c8f3c57308efc57