Unmanned　aerial　vehicle　(UAV)　transmits　data　through　wireless　communication.　Due　to　its　small　size　and　strong　mobility,　UAV　can　be　used　as　a　base　station　in　the　air　to　provide　communication　services　for　ground　users.　Therefore,　UAVs　can　be　used　in　natural　disaster　rescue,　video　shooting　and　other　tasks.　They　can　also　carry　some　loads,　such　as　high-definition　cameras,　infrared　cameras,　sensors,　etc.　to　transmit　and　forward　data　through　wireless　channels.　UAV　technology　has　attracted　more　and　more　attention　and　has　become　one　of　the　research　hotspots　in　recent　years.　The　cellular　network　of　UAV　is　studied.　The　UAV　channel　is　mainly　based　on　line　of　sight　link,　and　the　characteristics　of　UAV　channel　transmission　are　analyzed.　The　influence　of　UAV　position　on　the　overall　performance　of　the　whole　communication　system　is　explored,　and　the　transmission　and　control　methods　of　UAV　signal　power　are　discussed.　©　COPYRIGHT　SPIE.　Downloading　of　the　abstract　is　permitted　for　personal　use　only.