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Description: FSK信号发生器,用于软件测试.采样率、波特率，幅度，f1，f2可调，不含wave头，样点类型I16，保存为文件-FSK signal generator for software testing. Sampling rate, baud rate, magnitude, f1, f2 adjustable, excluding the first wave, point-like type infarction, preservation of documents
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Size: 420864 |
Author: pengsophy |
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Description: vhdl mfsk
多进制数字频率调制(MFSK)也称多元调频或多频制。MFSK系统是 2FSK(二频键控)系统的推广，该系统有 M个 不同的载波频率可供选择．每一个载波频率对应一个 M进制码 元信息，即用多个频率不同的正弦波分别代表不同的数字信号，在某一码元时间内只发送其中一个频率。-vhdl mfsk M-ary digital frequency modulation (MFSK), also known as multi-frequency or multi-frequency system. MFSK system is 2FSK (b Frequency Shift Keying) system, the promotion, the system has M different carrier frequencies to choose from. Each carrier frequency corresponds to an M-band meta-information code, which uses a number of different sine wave frequency, respectively, representing different digital signal, in a symbol time to send only one frequency.
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Size: 1024 |
Author: mzizai |
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Description: (1) 315、433、868、915Mh的ISM 和SRD频段
(2) 最高工作速率500kbps，支持2-FSK、GFSK和MSK调制方式
(3) 高灵敏度（1.2kbps下-110dDm，1％数据包误码率）
(4) 内置硬件CRC 检错和点对多点通信地址控制
(5) 较低的电流消耗（RX中，15.6mA，2.4kbps,433MHz）
(6) 可编程控制的输出功率，对所有的支持频率可达+10dBm
(7) 支持低功率电磁波激活功能
(8) 支持传输前自动清理信道访问（CCA），即载波侦听系统
(9) 快速频率变动合成器带来的合适的频率跳跃系统
(10) 模块可软件设地址，软件编程非常方便
(11) 标准DIP间距接口，便于嵌入式应用
(12) 单独的64字节RX和TX数据FIFO-(1) 315,433,868,915 Mh of the ISM and SRD frequency bands (2) maximum rate of 500kbps, support for 2-FSK, GFSK and MSK modulation (3) high sensitivity (1.2kbps under-110dDm, 1 packet error bit-rate) (4) built-in hardware CRC error detection and control of point-to-multipoint communication address (5) a lower current consumption (RX in, 15.6mA, 2.4kbps, 433MHz) (6) programmable control of output power for all the support frequencies up to+ 10dBm (7) to support low-power electromagnetic wave activation (8) to support the transmission before the automatic clean-up Channel Access (CCA), namely Carrier Sense System (9) Fast frequency synthesizer brought about by changes in suitable frequency hopping system (10) modules can be software-based address, software programming is easy (11) standard DIP spacing interfaces for embedded applications (12) separate 64-byte RX and TX data FIFO
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Size: 319488 |
Author: 李华力 |
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Description: FSK调制,采用直接查表法,生成一个周期的正弦波-FSK modulation, the use of direct look-up table method, to generate a sine wave cycle
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Size: 43008 |
Author: 陈鼎 |
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Description: 本设计采用AT89552单片机，辅以必要的模拟电路，实现了一个基于直接数字频率合成技术(DDS)的正弦谊号发生器。设计中采用DDS芯片AD9850产生频率1KHZ~10MHZ范围内正弦波，采用功放AD811控制输出电压幅度， 由单片机AT89S52控制调节步进频率1HZ。在此基础上，用模拟乘法器MC1496实现了正弦调制信号频率为1KHZ的模拟相度调制信号；用FPGA芯片产生二进制NRZ码,与AD9850结合实现相移键控PSK、幅移键控ASK、频移镇键FSK。-AT89552 the single-chip design, supplemented by the necessary analog circuits, based on the realization of a direct digital frequency synthesis (DDS) generator of sinusoidal No. Friends. The design of DDS chip AD9850 produced using 1KHZ ~ 10MHZ frequency range of sine wave, the AD811 control amplifier output voltage range of from single-chip AT89S52-conditioning step frequency control 1HZ. On this basis, the use of analog multiplier MC1496 has sinusoidal frequency modulation signal 1KHZ degree analog phase modulated signal generated by FPGA chip NRZ binary code, combined with the AD9850 to achieve phase shift keying PSK, ASK ASK, frequency Shift key town of FSK.
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Size: 208896 |
Author: 何蓓 |
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Description: 2fsk调制解调器的DSP实现，对于 2FSK，调制就是把输入数字序列变成适合于信道传输的变频正弦波（2FSK 信号）-2fsk modem DSP implementation, for 2FSK, modulation is to enter a number sequence into a suitable transmission channel frequency sine wave (2FSK signal)
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Size: 268288 |
Author: 白痴小明明 |
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Description: Frequency-shift keying (FSK) is a frequency modulation scheme in which digital information is transmitted through discrete frequency changes of a carrier wave.[1] The simplest FSK is binary FSK (BFSK). BFSK uses a pair of discrete frequencies to transmit binary (0s and 1s) information.[2] With this scheme, the "1" is called the mark frequency and the "0" is called the space frequency.
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Size: 48128 |
Author: saikiran reddy |
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Description: 采用MSP430作为主控制器，控制DDS芯片AD9854，输出高稳定度的正弦及方波信号，结合AD9854进行FSK,QAM调制-Using MSP430 as the main controller to control the DDS chip AD9854, high stability output sine and square wave signal, combined with AD9854 for FSK, QAM modulation
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Size: 4096 |
Author: alex |
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Description: Modulation of FSK:
Frequency-shift keying (FSK) is a frequency modulation scheme in which digital information is transmitted through discrete frequency changes of a carrier wave. The simplest FSK is binary FSK (BFSK). BFSK literally implies using a pair of discrete frequencies to transmit binary (0s and 1s) information. With this scheme, the 1 is called the mark frequency and the 0 is called the space frequency.
Demodulation:
Demodulation is the act of extracting the original information-bearing signal from a modulated carrier wave. The demodulator takes the digital data and, using the staircase maker and the delay unit, creates the analog signal. The created analog signal, however, needs to pass through a low-pass filter for smoothing. It has numerous advantages over AM, such as better fidelity and noise immunity. However, it is much more complex to both modulate and demodulate a carrier wave with FM, and AM predates it by several decades.
-Modulation of FSK:
Frequency-shift keying (FSK) is a frequency modulation scheme in which digital information is transmitted through discrete frequency changes of a carrier wave. The simplest FSK is binary FSK (BFSK). BFSK literally implies using a pair of discrete frequencies to transmit binary (0s and 1s) information. With this scheme, the 1 is called the mark frequency and the 0 is called the space frequency.
Demodulation:
Demodulation is the act of extracting the original information-bearing signal from a modulated carrier wave. The demodulator takes the digital data and, using the staircase maker and the delay unit, creates the analog signal. The created analog signal, however, needs to pass through a low-pass filter for smoothing. It has numerous advantages over AM, such as better fidelity and noise immunity. However, it is much more complex to both modulate and demodulate a carrier wave with FM, and AM predates it by several decades.
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Size: 1024 |
Author: punitha sp |
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Description: Frequency-shift keying (FSK) is a frequency modulation scheme in which digital information is transmitted through discrete frequency changes of a carrier wave. The simplest FSK is binary FSK (BFSK). BFSK uses a pair of discrete frequencies to transmit binary (0s and 1s) information.
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Size: 16384 |
Author: MEERA RAVI |
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