发射机编程举例

1、 发射机编程举例2 交织 16QAM 导频插入4. 交织4. 交织4. 交织5. 16QAM5. 16QAMmodule DATA_16QAM_mapper(DM_DIN,DM_ND,DM_RST,DM_CLK,DM_RE,DM_IM,DM_INDEX, DM_RDY);input DM_DIN; /输入信号input DM_CLK; /脉冲input DM_ND; /来自上一模块的信号提示input DM_RST;/复位信号output7:0 DM_RE;/输出16QAM调制的实部，八位，一位符号位，一位整数位，六位小数位output7:0 DM_IM;/输出16QAM调制的虚部output

2、5:0 DM_INDEX;/输出标号output DM_RDY;/输出信号提示5. 16QAM reg7:0 DM_RE;reg7:0 DM_IM;reg DM_RDY;reg7:0 RE_TEMP;/输出实部暂存reg7:0 IM_TEMP;/输出虚部暂存reg3:0 STOR;/由于四个输入信号对应一个星座点，因此需要四位的存储器存放reg MAPEN;reg5:0 DM_COUNT;reg5:0 DM_INDEX;reg OUTEN;/使Q_RDY比输入四个信号中最后一个晚一个脉冲的过渡，保证转换完成reg1:0 counter;/四个输入信号的计数reg1:0 OUT_COUNT;5.

3、 16QAMalways (negedge DM_RST or posedge DM_CLK) /Q_RST高电平异步清零 if(!DM_RST) begin MAPEN=1b0; DM_RE7:0=8b00000000; DM_IM7:0=8b00000000; DM_COUNT5:0=6b000000; DM_INDEX5:0=6b000000; DM_RDY=0; RE_TEMP7:0=8b00000000; IM_TEMP7:0=8b00000000; STOR3:0=4b0000; OUTEN=0; counter1:0=2b00; OUT_COUNT=2b00; end5. 16Q

4、AM else begin if(DM_ND) /数据放入缓存 begin counter=counter+1; case(counter) 2b00:STOR0=DM_DIN; 2b01:STOR1=DM_DIN; /存入输入数值 2b10:STOR2=DM_DIN; 2b11:STOR3=DM_DIN; endcase end5. 16QAM else begin counter1:0=2b00; STOR3:0=4b0000; end if (counter=2b11) / MAPEN 标记四个信号是否已经存入 MAPEN=1b1; else MAPEN=1b0; 5. 16QAM if

5、(MAPEN) /映射 begin case(STOR1:0) 2b00:RE_TEMP7:0=8b11000011; 2b10:RE_TEMP7:0=8b11101100; 2b01:RE_TEMP7:0=8b00111101; 2b11:RE_TEMP7:0=8b00010100; endcasecase(STOR3:2)2b00:IM_TEMP7:0=8b11000011;2b10:IM_TEMP7:0=8b11101100;2b01:IM_TEMP7:0=8b00111101; 2b11:IM_TEMP7:0=8b00010100;endcase5. 16QAMOUTEN=1;end

6、else begin OUTEN=0;RE_TEMP7:0=8b00000000;IM_TEMP7:0=8b00000000;end5. 16QAMif(OUTEN) / 输出 begin DM_RE=RE_TEMP; DM_IM=IM_TEMP; DM_COUNT=DM_COUNT+1; DM_INDEX=DM_COUNT; DM_RDY=1b1; end if (DM_INDEX=47) OUT_COUNT=OUT_COUNT+1; else OUT_COUNT=0;5. 16QAM if (OUT_COUNT=2b11) begin DM_RE7:0=8b00000000; DM_IM7:0=8b00000000; DM_INDEX5:0=6b000000; DM_COUNT5:0=6b000000; DM_RDY=0; endend endmodule6. 导频插入训练序列的生成方法：设计中直接将训练序列的时域样值存在片内存储器中，发送时只需按规定的时序