很不错的源程序

				/* inBuf存取I、Q信号缓冲区，16位，缓冲区大小1024 */
				/*outBuf存取解调后数据缓冲区，32位，缓冲区大小256*/
				/* arctan ()为反正切函数*/
				demodulateFSK(INT16 *inBuf,Uint32 *outBuf,INT16 Length)
				{
					INT16 i;
					for(i=0;i					{
						*outBuf[i/4]=arctan(inBuf[i+1]/inBuf[i])- arctan(inBuf[i+3]/inBuf[I+2]);
					}
				}