原帖由 <i>evergreen9</i> 于 2011-12-10 10:28:11 发表 <a href="http://www.mscbsc.com/bbs/redirect.php?goto=findpost&pid=3911011&ptid=305617" target="_blank"><img src="http://www.mscbsc.com/bbs/images/common/back.gif" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt='Click here to open new window\nCTRL+Mouse wheel to zoom in/out';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor='hand'; this.alt='Click here to open new window\nCTRL+Mouse wheel to zoom in/out';}" onclick="if(!this.resized) {return true;} else {window.open(this.src);}" onmousewheel="return imgzoom(this);" alt="" /></a><br />
下行DPDCH和DPCCH时分复用,PO1/2/3是控制信道的不同字段与数据信道的功率偏置,这三个参数由上层配置。上行DPDCH和DPCCH分为I/Q两个支路(一个DPDCH的情况下),由另外的Beta_d/c值设定两个信道的相对功率。
可是为何如此呢,难道同样dpcch和dpdch都象上行那样获得功率不行吗?上行也有dpcch的tpc,tfci,pilot,为何又没功率偏置?