Description: 描述了一个用于微波传输设备的16QAM接收机解调芯片的FPGA实现,芯片集成了定时恢复、载波恢复和自适应盲判决反馈均衡器(DFE),采用恒模算法(CMA)作为均衡算法。芯片支持高达25M波特的符号速率,在一片EP1C12Q240C8(ALTERA)上实现,即将用于量产的微波传输设备中。
-Describes a microwave transmission equipment for 16QAM receiver demodulator chip FPGA realization of an integrated chip timing recovery, carrier recovery and blind adaptive decision feedback equalizer (DFE), using constant modulus algorithm (CMA) as the equalization algorithm. Chip supports up to 25M baud symbol rate, in the midst of EP1C12Q240C8 (ALTERA) achieved for the upcoming production of microwave transmission equipment. Platform: |
Size: 281600 |
Author:萝卜 |
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Description: 数字基带信号的传输是数字通信系统的重要组成部分。在数字通信中，有些场合可不经过载波调制和解调过程，而对基带信号进行直接传输。采用AMI码的信号交替反转，有可能出现四连零现象，这不利于接收端的定时信号提取。而HDB3码因其无直流成份、低频成份少和连0个数最多不超过三个等特点，而对定时信号的恢复十分有利，并已成为CCITT协会推荐使用的基带传输码型之一。为此，本文利用VHDL语言对数据传输系统中的HDB3编码器进行了设计。-Digital baseband signal transmission is an important digital communication system components. In digital communications, some occasions may, after modulation and demodulation process, and on the base-band signals transmitted directly. AMI code using the turn signal inversion, there may be zero Silian phenomenon, which is not conducive to the receiving end of the timing signal extraction. HDB3 code and its non-DC components, and even less low-frequency components of 0 up to more than three the number of characteristics such as timing signals for the recovery of very favorable, and the Association has become the CCITT recommended base-band transmission-type, one code. In this paper, the use of VHDL language in the data transmission system HDB3 encoder has been designed. Platform: |
Size: 108544 |
Author:shashou |
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Description: 数字基带信号的传输是数字通信系统的重要组成部分。在数字通信中，有些场合可不经过载波调制和解调过程，而对基带信号进行直接传输。采用AMI码的信号交替反转，有可能出现四连零现象，这不利于接收端的定时信号提取。而HDB3码因其无直流成份、低频成份少和连0个数最多不超过三个等特点，而对定时信号的恢复十分有利，并已成为CCITT协会推荐使用的基带传输码型之一。为此，本文利用VHDL语言对数据传输系统中的HDB3编码器进行了设计。
基于达到达到达到的信号发生器的源程序-Digital baseband signal transmission is a digital communications system, an important component. In digital communication, there are some occasions, may from time through the carrier modulation and demodulation process, the base-band signal for direct transmission. AMI code signal using alternating inversion, there may be four to zero with the phenomenon, which is not conducive to the receiving end of the timing signal extraction. The HDB3 code because of its non-DC components, low-frequency components, and even a small number of 0 up to more than three characteristics, while the timing signal recovery is very favorable, and has become CCITT Association recommended one of baseband transmission pattern. In this paper the use of VHDL language for data transmission system in the HDB3 encoder has been designed. Based on the signal generator to achieve to reach to reach the source Platform: |
Size: 3072 |
Author:成风 |
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Search - timing recovery vhdl