18-10 SAWマッチドフィルタを用いたスペクトル拡散無線とその動画像伝送への一応用

概要

論文の詳細を見る
A 1Mbps spread spectrum (SS) radio unit has been developed for wireless communication. As a first step, the very weak intensity 300MHz carrier signals are transmitted with direct sequence (DS) spectrum-spreading. The received signals are despread by using a SAW matched filter with a locally deposited ZnO layer on the input IDT on a st-cut quartz substrate to reduce mismatch loss. For DPSK data time-sidelobe of the filter autocorrelation is reduced using a new 25 chip spreading code. Further a time-window threshold-gate is developed, enhancing the receiver sensitivity by 8dB. As a tryal application to moving-picture wireless-transmission, a prototype visual transceiver has been developed, receiving the moving pictures of 112 × 112pixels with 5 frames/s at a distance 10 to 20m from the transmitter.
社団法人映像情報メディア学会の論文
1996-07-17