Multi-codebook quantization (MCQ) is the task of expressing a set of vectors as accurately as possible in terms of discrete entries in multiple bases. Work in MCQ is heavily focused on lowering...doi:10.1007/978
Such a rank-specific codebook design can considerably improve the performance by allowing finer quantization of the transmission space. Power control across the various modes can also be provided. A power control strategy assigns a different fraction of the transmit power to each mode based on the ...
Sheikhan M, Garoucy S (2010) Hybrid VQ and neural models for ISF quantization in wideband speech coding. World Appl Sci J 10 (Special Issue of Computer & Electrical Engineering):59–66 Goldberg DE (1989) Genetic algorithms in search, optimization and learning, 1st edn. Addison Wesley, Boston...
104b, and104c. But even if base station102had complete, accurate, and current knowledge of the downlink channels to UEs104a,104b, and104c, beamforming efficiency can still be sub-optimal if the precoder codebook did not provide a sufficiently granular quantization of the precoder vector ...
This paper introduces an algorithm for speaker identification based on multi-codebook vector quantization (MCVQ). MCVQ combines different size codebooks to achieve high recognition accuracy for text-independent speaker identification and reduce the number of distortion calculations during matching between ...
Multi codebook vector quantization of LPC parameters - Xydeas, Chapman - 1998 () Citation Context ...of LSF parameters, reducing from 24 to 20 the number of bits/frame. Another method that uses the memory in the process of transmission and reception of the quantization index is presented in...
CLtreeFNGLVQMitra dataadaptive multi codebook fuzzy neuro generalized learning vector quantizationdecision tree based clusteringIn this paper, a new codebook based learning method, Adaptive Multicodebook Fuzzy Neuro Generalized Learning Vector Quantization (FNGLVQ), is proposed. The main contribution of ...
Transmit beamforming can exploit the spatial diversity afforded by multiple-input multiple-output (MIMO) systems with low complexity. To apply this technique in more practical systems with the constraint of limited feedback, codebook based beamforming and vector quantization technique have been ...
The invention discloses a codebook design method for multi-antenna quantization precoding. A codebook designed through the codebook design method is composed of a main codebook and an auxiliary codebook; the main codebook is a Kerdock codebook, and the auxiliary codebook is composed of a series ...
The quantization indices, as well as the fixed codebook indices, may be sent from the encoder to the decoder. The CELP decoder uses the fixed codebook indices to extract a vector from the fixed codebook. The vector may be multiplied by the fixed-codebook gain, to create a fixed codebook ...