New PDF release: Acoustic MIMO Signal Processing

By Dr. Yiteng Arden Huang, Dr. Jingdong Chen, Prof. Dr. Jacob Benesty (auth.)

ISBN-10: 0387276742

ISBN-13: 9780387276748

ISBN-10: 0387276769

ISBN-13: 9780387276762

Acoustic MIMO sign Processing

Yiteng (Arden) Huang

Jacob Benesty

Jingdong Chen

Telecommunication platforms and human-machine interfaces commence utilizing a number of microphones and loudspeakers on the way to make conversations and interactions extra realistic, therefore extra effective. This improvement offers upward thrust to quite a few acoustic sign processing difficulties below multiple-input multiple-output (MIMO) eventualities, encompassing far-off speech acquisition, sound resource localization and monitoring, echo and noise regulate, resource separation and speech dereverberation, and so forth. the decade has witnessed a growing to be curiosity in exploring those difficulties, yet there was little attempt to enhance a idea to have a lot of these difficulties investigated in a unified framework. This targeted booklet makes an attempt to fill the gap.

Acoustic MIMO sign Processing is split into significant components - the theoretical and the sensible. The authors commence by means of introducing an acoustic MIMO paradigm, constructing the basic of the sphere, and linking acoustic MIMO sign processing with the options of classical sign processing and verbal exchange theories by way of approach identity, equalization, and adaptive algorithms. within the moment a part of the publication, a unique and penetrating research of aforementioned acoustic functions is conducted within the paradigm to enhance the elemental recommendations of acoustic MIMO sign processing.

Acoustic MIMO sign Processing is a well timed and significant specialist reference for researchers and working towards engineers from universities and quite a lot of industries. it's also an outstanding textual content for graduate scholars who're attracted to this interesting field.

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Proportionate normalized LMS (PNLMS) is one of the first adaptive algorithms exploiting sparseness of acoustic channels [102]. In Chap. 4, the PNLMS and another class of exponentiated adaptive algorithms for the identification of sparse acoustic impulse responses will be discussed. In this section, we intend to define a measure to quantitatively, rather than just qualitatively, evaluate the sparseness of an acoustic impulse response. We believe that a good sparseness measure needs to have the following properties: • • • bounded rather than infinite range of definition; invariant with a non-zero scaling factor; independent of the sorting order of the channel impulse response coefficients.

Lim h(A;) = h. 5 Basic Adaptive Algorithms 43 where Amax is the largest eigenvalue of the correlation matrix R. Let us evaluate the time needed for each natural mode to converge to a given value. lnfci}. 65). Therefore, ri = rir^-Ti' ln|l (^•^^) -fiXil We can link the time constant with the condition number of the correlation matrix R. 68) where to guaranty the convergence of the algorithm, a is called the normalized stepsize parameter. Suppose that the smallest eigenvalue is Ai = Amin; in this case, -1 ln|l -aAmin/A max = ln|l-aL[R]r ^'-''^ where X2[R] = Amax/Amin- We see that the convergence time of the slowest natural mode depends on the conditioning of R.

6 that the number of surfaces the path crosses from an image to the microphone equals the number of real reflections. First, we show how many surfaces perpendicular to the x axis the path will cross. Then the same idea can be extended to the y and z directions. Finally the overall number of surfaces the path crosses and the overall loss of wave amplitude due to reflections can be produced. /3x, ! , 2 27 fx, ^ l^xo ^ ^ 3 4 X (b) Fig. 7. Illustration of the number of surfaces the path crosses from an image to the microphone in the x direction for (a) px = 0 and (b) px = l- (The legend is the same as that in Fig.

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Acoustic MIMO Signal Processing by Dr. Yiteng Arden Huang, Dr. Jingdong Chen, Prof. Dr. Jacob Benesty (auth.)

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