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引用次数: 1
摘要
本文介绍了一种采用现场可编程门阵列(fpga)实现的有线数字视频广播系统(DVB-C2)收发器的现场测试结果。测试结果显示了DVB-C2收发器的物理信道状态和性能，包括采样时钟偏移(SCO)、频率偏移(FO)、混合光纤同轴(HFC)信道的频率响应、前向纠错(FEC)解码器前的未编码误码率(BER)和前向纠错(FEC)解码器后的误码率(BER)。由于通过商用HFC网络以55mbps的原始数据速率成功接收了运动图像导出组传输流(MPEG-TS)，因此可以期望为超高清(UHD)等高数据速率提供服务。此外，由于测量的无编码误码率满足10-2的无编码误码率要求，因此所实现的DVB-C2收发器可以支持4096QAM和16384QAM。因此，它可以作为支持DVB-C2和DOCSIS (data-over-cable service interface specification) 3.1的电缆调制解调器使用。
Performance analysis and implementation of a DVB-C2 transceiver
This paper depicts a results of field test for an implemented digital video broadcasting for cable system (DVB-C2) transceiver, which has been implemented using field programmable gate arrays (FPGAs). The test results show the physical channel status and performance of the DVB-C2 transceiver, which includes the sampling clock offset (SCO), the frequency offset (FO), the frequency response of the hybrid fiber coax (HFC) channel, the uncoded-bit error rate (BER) before the forward error correction (FEC) decoder, and the BER after the FEC decoder. Since the moving picture exports group-transport stream (MPEG-TS) is received successfully with a raw data rate of 55 Mbps through a commercial in-service HFC network, a high data rate such as ultra-high definition (UHD) can be expected to be serviced. In addition, because the measured uncoded-BER satisfies the requirement of 10-2 uncoded-BER, the implemented DVB-C2 transceiver can support 4096QAM as well as 16384QAM. Therefore, it can be used as a cable modem supporting DVB-C2 and the data-over-cable-service-interface-specifications (DOCSIS) 3.1.
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