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Table 4 Huffman code for GR parameters

From: Beamforming matrix quantization with variable feedback rate

GR parameters ψ21and ψ32

Quantized value of ψ 21 or ψ 32

Probability (i)

Huffman code

Bits for ψ 21 or ψ 32 (ii)

Ave bits for ψ 21 or ψ 32 (i) × (ii)

11.25

0.14714

110

3

0.44142

33.75

0.35496

0

1

0.35496

56.25

0.35146

10

2

0.70292

78.75

0.14644

111

3

0.43932

    

1.93862

GR parameters ψ 31

Quantized value of ψ 31

Probability (i)

Huffman code

Bits for ψ 31 (ii)

Ave bits for ψ 31 (i) × (ii)

11.25

0.2722

10

2

0.5444

33.75

0.47748

0

1

0.47748

56.25

0.2299

110

3

0.6897

78.75

0.02042

111

3

0.06126

    

1.77284