求翻译：圖4所示為一使用格雷映對 (Gray mapping) 的16-QAM星座圖及其CES。圖4(a)所示為一個16-QAM訊號星座圖，且每一符元皆有唯一映對的資料位元內容，反觀16-QAM延伸星座圖方案，則是部分符元具有二個可映對的資料位元內容是什么意思？

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(Figure 4 use of the gray image (Gray mapping) of 16-QAM constellation figure and its CES. Figure 4 (a) are shown in a 16-QAM SIGNAL constellation figure, and each of the operator dollar are only image of the information bit, on the contrary 16-QAM extended constellation figure program, is that some

Shown in Figure 4 is a use grey reflects to (Gray mapping) the 16-QAM star map and CES.Chart 4(a) shows is a 16-QAM signal star map, also each Fu Yuanjie has only reflects to the material element content, instead observes 16-QAM to extend the star map plan, then is the partial symbol Yuan has two ma

As shown in Figure 4 using geleiying (Gray mapping) 16-QAM constellation and CES. Figure 4 (a) a 16-QAM signal constellation diagram are shown in, and every Fu Yuan is the only map data content, looking back at extension 16-QAM constellation programme, it is part of Fu Yuan has two enantiomers on da

4 16 using Grey to reflect (Gray mapping) - QAM constellations and CES shown. 4 (a) one 16 - QAM訊號 constellations shown, and every incantation yuan all have only 資 material location yuan reflected to hold, extend the constellation scheme against ?6 - QAM, agreeing with yuan two 資 material location y