Soft bit un-uniform quantization method, apparatus, computer program and storage medium

An apparatus for soft bit non-uniform quantization, comprising:

• a determination module, which is configured to determine, based at least on a number of quantization bits, a threshold value defining an upper and lower bound for a quantization value range;
• a first obtaining module, which is configured to obtain a quantization step value, which is based on the threshold value, wherein the quantization step value is uniform within the quantization value range, and wherein the quantization
• step
• ⁢
• ⁢
• value
• =
• α
• 2
• 3
• ,
• in which α is the threshold value;
• a second obtaining module, which is configured to obtain a first data having a value after a QAM and before a Turbo decoding in a wireless communication system;
• and
• a quantization module, which is configured to perform a soft bit non-uniform quantization on the first data to obtain a quantization result according to the threshold value and the quantization step value, wherein
• the value of the first data is set equal to the threshold value when the value of the first data is greater than or equal to a value that is a difference between the upper bound of the threshold value and the quantization step value,
• the value of the first data is set equal to a negative of the threshold value when the value of the first data is less than a value that is a difference between the lower bound of the threshold value and the quantization step value, and
• the value of the first data is quantized based on the uniform quantization step within the quantization value range.

A soft-bit quantization method, comprising:

• obtaining a first data having a value after a Quadrature Amplitude Modulation (QAM), and before a Turbo decoding in a wireless communication system;
• and
• performing a soft bit quantization using a quantization step value on the first data to obtain a quantization result by
• setting the value of the first data equal to an upper limit value when the value of the first data is greater than or equal to a value that is a difference between the upper limit value and the quantization step value,
• setting the value of the first data equal to a lower limit value when the value of the first data is less than a value that is a difference between the lower limit value and the quantization step value, and
• setting the value of the first data equal to a value between the upper and lower limit values using the quantization step value, wherein the soft bit quantization produces an X bit quantization value and the quantization step value is equal to a uniform quantization step value for an X+1 bit quantization value, and wherein the quantization
• step
• ⁢
• ⁢
• value
• =
• α
• 2
• 3
• ,
• in which α is the upper limit value.