Radio communication device having carrier phase noise elimination function, and radio communication method

摘要

A radio communication device reproduces a carrier signal by eliminating phase noise from a carrier phase signal detected from a received baseband signal. Herein, a filtering characteristic having a default value is adopted to eliminate phase noise from the carrier phase signal with respect to a firstly received baseband signal. Integrated phase noise characteristics are calculated by adding a transmission-side phase noise characteristic, which is extracted from a radio frame demodulated from the carrier signal, to a predetermined reception-side phase noise characteristic. An optimum filtering characteristic is selected through comparison between a threshold and integrated phase noise characteristics. The selected filtering characteristic is adopted to eliminate a noise component from the carrier phase signal with respect to a subsequent baseband signal.

主权项

1. A radio communication device comprising:
a carrier reproduction filter which is configured to eliminate a noise component from a carrier phase signal detected from a received baseband signal; a carrier reproduction part which is configured to reproduce a carrier signal based on the carrier phase signal; a reception part which is configured to implement carrier synchronization using the carrier signal; a phase noise information extraction part which is configured to extract a transmission-side phase noise characteristic from a radio frame demodulated from the carrier signal; and a filtering characteristic selection part which is configured to calculate integrated phase noise characteristics by adding a predetermined reception-side phase noise characteristic to the extracted transmission-side phase noise characteristic and which is configured to select a filtering characteristic based on comparison between a predetermined threshold and the integrated phase noise characteristics, wherein the filtering characteristic selection part selects a broadband filtering characteristic with respect to the integrated phase noise characteristics higher than the threshold while selecting a narrowband filtering characteristic with respect to the integrated phase noise characteristics lower than the threshold.