16位booth乘法器的实现：先将被乘数的最低位加设一虚拟位。开始虚拟位变为零并存放于被乘数中，由最低位与虚拟位开始，一次判定两位，会有4种判定结果。(The 16 bit booth multiplier to achieve: first the least significant bit is added with a virtual position. Start a virtual becomes zero and stored in the multiplicand, starting from the lowest and the virtual position, determine the two time, there will be 4 kinds of results.)