| 主权项 |
1. A radio transmission system in which a MIMO technology is applied to line-of-sight communication, the system comprising:
a MIMO (Multiple Input Multiple Output) reception processing unit that performs reception-side MIMO processing to output a plurality of reception modulated signals respectively corresponding to a plurality of unique paths; an interference compensation unit that receives corresponding one of the reception modulated signals from the MIMO reception processing unit to cancel inter-path interference contained therein and caused as interference between the unique paths by difference in propagation delay according to antenna-to-antenna distances; and a carrier regenerator provided in association with each of the plurality of reception modulated signals for demodulating an input modulated signal and outputting the demodulated signal, wherein the interference compensation unit comprises: an error detector which, upon receiving the demodulated signal, detects a deviation of the demodulated signal from an ideal signal point and generates an error signal representing the phase direction and amplitude of the deviation; a compensation signal generator which generates a compensation signal for cancelling the inter-path interference contained in the corresponding reception modulated signal with the use of the error signal; and an adder which adds the compensation signal to the corresponding reception modulated signal and outputs the addition result to the carrier regenerator as the input modulated signal. |
