Method and device for quantizing data representative of a radio signal received by a radio antenna of a mobile network

A device for quantizing data representative of a radio signal received by a radio antenna of a mobile network, comprising:

• a demodulator configured to demodulate said radio signal received by said antenna, providing a demodulated signal;
• a processor and a memory configured to quantize each value of said demodulated signal using a scalar quantization table selected according to a channel coding level used to transmit said radio signal, providing a quantized demodulated signal;
• and
• a transmitter configured to transmit said quantized demodulated signal to a channel decoding module,
• and wherein the processor and the memory are further configured to determine at least one scalar quantization table for each channel coding level from a set of learning radio signals by:
• estimating a distribution of an absolute value of the values of the demodulated radio signal, and,
• for at least one quantization level corresponding to a representation of the quantized values of the demodulated signal quantized on a determined number of bits, calculating quantization intervals from said estimated distribution, each quantization interval comprising a same number of values of the demodulated radio signal.

A mobile network device comprising:

• at least one quantization device for quantizing data representative of a radio signal received by a radio antenna of a mobile network, the at least one quantization device comprising:
• a demodulator configured to demodulate said radio signal received by said antenna, providing a demodulated signal;
• a processor and a memory configured to quantize each value of said demodulated signal using a scalar quantization table selected according to a channel coding level used to transmit said radio signal, providing a quantized demodulated signal, and to determine at least one scalar quantization table for each channel coding level from a set of learning radio signals by:
• estimating a distribution of an absolute value of the values of the demodulated radio signal, and,
• for at least one quantization level corresponding to a representation of the quantized values of the demodulated signal quantized on a determined number of bits, calculating quantization intervals from said estimated distribution, each quantization interval comprising a same number of values of the demodulated radio signal;
• and
• a transmitter configured to transmit said quantized demodulated signal to a channel decoding module;
• the channel decoding device in the form of a programmable circuit configured to implement a channel decoding scheme of the demodulated signal, and
• at least one communication bus able to transmit the quantized demodulated signal from the at least one quantization device to the channel decoding device.

A method implemented by a device of a mobile network and comprising:

• receiving a radio signal from a radio antenna of the mobile network;
• demodulating said radio signal received by said antenna, providing a demodulated signal;
• performing a scalar quantization of each value of said demodulated signal using a quantization table selected according to a channel coding level used to transmit said radio signal, providing a quantized demodulated signal;
• transmitting said quantized demodulated signal to a channel decoding module;
• and
• before performing the scalar quantization, determining, for each channel coding level, at least one scalar quantization table from a set of learning radio signals, wherein the determining of said at least one scalar quantization table comprises the following sub-steps:
• determining a set of candidate quantization vectors, and
• for each candidate quantization vector:
• quantizing the demodulated learning radio signals using said quantization vector, providing quantized demodulated learning radio signals,
• calculating a distortion from said quantized demodulated learning radio signals,
• selecting the quantization vector of said set minimizing said distortion.

A device for quantizing data representative of a radio signal received by a radio antenna of a mobile network, comprising:

• a demodulator configured to demodulate said radio signal received by said antenna, providing a demodulated signal;
• a processor and a memory configured to quantize each value of said demodulated signal using a scalar quantization table selected according to a channel coding level used to transmit said radio signal, providing a quantized demodulated signal;
• and
• a transmitter configured to transmit said quantized demodulated signal to a channel decoding module,
• and wherein the processor and the memory are further configured to determine at least one scalar quantization table for each channel coding level from a set of learning radio signals by:
• determining a set of candidate quantization vectors, and
• for each candidate quantization vector:
• quantizing the demodulated learning radio signals using said quantization vector, providing quantized demodulated learning radio signals,
• calculating a distortion from said quantized demodulated learning radio signals,
• selecting the quantization vector of said set minimizing said distortion.

A mobile network device comprising:

• at least one quantization device for quantizing data representative of a radio signal received by a radio antenna of a mobile network, the at least one quantization device comprising:
• a demodulator configured to demodulate said radio signal received by said antenna, providing a demodulated signal;
• a processor and a memory configured to quantize each value of said demodulated signal using a scalar quantization table selected according to a channel coding level used to transmit said radio signal, providing a quantized demodulated signal, and to determine at least one scalar quantization table for each channel coding level from a set of learning radio signals by:
• determining a set of candidate quantization vectors, and for each candidate quantization vector:
• quantizing the demodulated learning radio signals using said quantization vector, providing quantized demodulated learning radio signals,
• calculating a distortion from said quantized demodulated learning radio signals,
• selecting the quantization vector of said set minimizing said distortion;
• and
• a transmitter configured to transmit said quantized demodulated signal to a channel decoding module;
• the channel decoding device in the form of a programmable circuit configured to implement a channel decoding scheme of the demodulated signal, and
• at least one communication bus able to transmit the quantized demodulated signal from the at least one quantization device to the channel decoding device.