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TI数字信号处理库,出现了一个Q31的格式,按照IQ格式的理解就是小数点在第31位上,那具体是什么意思呢?
手册里说需要转换成Q31格式,搞得我一头雾水 .
例程里,有这么一句 xn=(long)(2147483648*(sin(Rad) + cos(Rad*2.3567))/2); //Q31
从long的角度来看,第一位始终是1,也就是始终是负值. 具体请看附件