系统采用同步设计方法,时钟源由电路板上40MHz石英振荡器提供。XC2V500高达50万门,其中集成了大量的乘法器,DCM以及全局时钟布线资源,给系统实现带来了很大的方便。系统在实现时需要多个时钟,主要由DCM分频和倍频得到。实现中,除了上述对电路进行的优化设计,在不影响系统性能的情况下,对运算的中间结果进行尾数截断,很大程...
If DCM is applied, then the transmitter modulates the same encoded bits onto two separated subcarriers with the same or different constellation mapping schemes. DCM suffers from a high peak-to-average power ratio (PAPR). In accordance with one novel aspect, a method of transmitting and encoding...
//2 time ca clock CLOCK_DCM2 CLOCK_DCM2_u( .i_clk (i_clk), .i_rst (i_rst), .o_clk_dwen (), .o_clk_ca (clk_ca), .o_clk_ca_2code (clk_ca_2code), .o_clk_p (clk_p), .o_clk_p_2code (clk_p_2code) ); //CAPTURE //CAPTURE //frequency capture wire signed[9:...
wire clk_p; wire clk_p_2code;//2 time ca clockCLOCK_DCM2CLOCK_DCM2_u( .i_clk (i_clk),.i_rst(i_rst),.o_clk_dwen(),.o_clk_ca(clk_ca),.o_clk_ca_2code(clk_ca_2code),.o_clk_p(clk_p),.o_clk_p_2code(clk_p_2code) );//CAPTURE//CAPTURE//frequency capturewire sign...
CLOCK_DCM2 CLOCK_DCM2_u( .i_clk (i_clk), .i_rst (i_rst), .o_clk_dwen (), .o_clk_ca (clk_ca), .o_clk_ca_2code (clk_ca_2code), .o_clk_p (clk_p), .o_clk_p_2code (clk_p_2code) ); //CAPTURE //CAPTURE ...
FPGA_ASIC-数字差分BPSK扩频接收机的设计与FPGA实现 数字差分BPSK扩频接收机的设计与FPGA实现 摘要：本文提出了一种全数字差分BPSK扩频接收机的实现方案，通过Simulink仿真验证了该方案具有较低的误码率。然后利用Verilog硬件描述语言编程，通过了综合和仿真验证，最后在Xilinx公司FPGA上实现了整个系统。该系统经过优化设计，...
CLOCK_DCM2 CLOCK_DCM2_u( .i_clk (i_clk), .i_rst (i_rst), .o_clk_dwen (), .o_clk_ca (clk_ca), .o_clk_ca_2code (clk_ca_2code), .o_clk_p (clk_p), .o_clk_p_2code (clk_p_2code) ); //CAPTURE //CAPTURE ...
Performance of a 60-GHz DCM-OFDM and BPSK-Impulse Ultra-Wideband System with Radio-Over-Fiber and Wireless Transmission Employing a Directly-Modulated VCSEL The performance of radio-over-fiber optical transmission employing vertical-cavity surface-emitting lasers (VCSELs), and further wireless ...
opdcMhomodynedetectionarediscussed.Furthermore, thecoherent systemexperiments arecarriedoutonthemodulelevel.The systemdesign philosophy and top—levelspecifications age presented,which foundedthe preliminary benchmarkofinter-satelliteopticalcoherentcommunicationlinks.Theseresults provide somebenchmarksforFSOcoherentcom...
CLOCK_DCM2 CLOCK_DCM2_u( .i_clk (i_clk), .i_rst (i_rst), .o_clk_dwen (), .o_clk_ca (clk_ca), .o_clk_ca_2code (clk_ca_2code), .o_clk_p (clk_p), .o_clk_p_2code (clk_p_2code) ); //CAPTURE //CAPTURE ...