Base station system and communication apparatus

A base station system comprising a baseband unit and a radio frequency (RF) unit connected to the baseband unit via a communication line, the baseband unit comprising:

• a generation unit configured to generate, as sampled data, a digital signal corresponding to a baseband signal to be transmitted to the RF unit;
• a measurement unit configured to measure frequencies of occurrence of sampled values indicated by the sampled data generated by the generation unit, and generate a frequency distribution representing a relationship between a sampled value having occurred and a frequency of occurrence;
• a determination unit configured to determine a plurality of thresholds for compressing the sampled data, which are used for quantization processing of a sampled value, in accordance with the frequency distribution generated by the measurement unit;
• and
• a compression unit configured to compress the sampled data by the quantization processing using the plurality of thresholds determined by the determination unit to generate compressed data to be transmitted to the RF unit.

A communication apparatus for communicating with an opposing apparatus connected via a communication line in a base station system, comprising:

• a generation unit configured to generate, as sampled data, a digital signal corresponding to a baseband signal to be transmitted to the opposing apparatus;
• a measurement unit configured to measure frequencies of occurrence of sampled values indicated by the sampled data generated by the generation unit, and generate a frequency distribution representing a relationship between a sampled value having occurred and a frequency of occurrence;
• a determination unit configured to determine a plurality of thresholds for compressing the sampled data, which are used for quantization processing of a sampled value, in accordance with the frequency distribution generated by the measurement unit;
• and
• a compression unit configured to compress the sampled data by the quantization processing using the plurality of thresholds determined by the determination unit to generate compressed data to be transmitted to the opposing apparatus.