Wireless transmission system, wireless communication device and wireless transmission method

Abstract

Disclosed herein is a wireless transmission system. Transmission antennas are provided on a first communication apparatus while reception antennas individually corresponding to the transmission antennas are provided on a corresponding second communication apparatus. Each reception antenna receives a desired wave from a corresponding transmission antenna as a direct wave and receives an unnecessary wave from a different transmission antenna as a direct wave. The first communication apparatus modulates only the amplitude of a carrier signal for all channels. The second communication apparatus demodulates composite waves of desired waves and unnecessary waves received by the reception antennas by envelope detection or square-law detection and carries out correction operation for the demodulation signals based on transmission characteristics of transmission spaces between the transmission and reception antennas to acquire transmission subject signals.

What is claimed is: 
     
         1 . A wireless transmission system comprising:
 a transmission side antenna configured to emit an electromagnetic wave;   a different transmission side antenna configured to emit a different electromagnetic wave;   a reception side antenna configured to receive said electromagnetic wave and said different electromagnetic wave;   a different reception side configured to receive said electromagnetic wave and said different electromagnetic wave,   wherein a desired wave inter-antenna distance separates said different transmission side antenna from said different reception side antenna, an undesired wave inter-antenna distance separating said different transmission side antenna from said reception side antenna.   
     
     
         2 . The wireless transmission system according to  claim 1 , wherein said desired wave inter-antenna distance separates said transmission side antenna from said reception side antenna, said undesired wave inter-antenna distance separating said transmission side antenna from said different reception side antenna. 
     
     
         3 . The wireless transmission system according to  claim 1 , wherein said desired wave inter-antenna distance differs from said undesired wave inter-antenna distance. 
     
     
         4 . The wireless transmission system according to  claim 1 , wherein said transmission side antenna is spaced apart from said different transmission side antenna. 
     
     
         5 . The wireless transmission system according to  claim 1 , wherein said reception side antenna is spaced apart from said different reception side antenna. 
     
     
         6 . The wireless transmission system according to  claim 1 , wherein said transmission side antenna and said different transmission side antenna are on a transmission side semiconductor chip. 
     
     
         7 . The wireless transmission system according to  claim 1 , wherein said reception side antenna and said different reception side antenna are on a reception side semiconductor chip. 
     
     
         8 . The wireless transmission system according to  claim 1 , further comprising:
 a modulation functional unit configured to modulate a data signal with a carrier signal, said data signal modulated with said carrier signal being said electromagnetic wave.   
     
     
         9 . The wireless transmission system according to  claim 1 , further comprising:
 a different modulation functional unit configured to modulate a different data signal with a different carrier signal, said different data signal modulated with said different carrier signal being said different electromagnetic wave.   
     
     
         10 . The wireless transmission system according to  claim 1 , further comprising:
 a demodulation functional unit configured to demodulate said electromagnetic wave into an information signal.   
     
     
         11 . The wireless transmission system according to  claim 1 , further comprising:
 a different demodulation functional unit configured to demodulate said different electromagnetic wave into a different information signal.   
     
     
         12 . The wireless transmission system according to  claim 1 , further comprising:
 a processor configured to perform a correction calculation process, said correction calculation process using a demodulated signal and a different demodulated signal,   wherein said electromagnetic wave is demodulated to become said demodulated signal, said different electromagnetic wave being demodulated to become said different demodulated signal.