Application of IIR Oscillator at FSK Modem – System Configuration and Implementation
碩士 === 逢甲大學 === 通訊工程所 === 92 === Abstract The modulation is an important technique on the communication system﹒Various reasons exist for modulation：(1) in wired systems﹐coaxial lines exhibit superior shielding at higher frequencies﹔(2) in wireless systems﹐the antenna size should be a significant fra...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2004
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| Online Access: | http://ndltd.ncl.edu.tw/handle/32594779449626131067 |
| Summary: | 碩士 === 逢甲大學 === 通訊工程所 === 92 === Abstract
The modulation is an important technique on the communication system﹒Various reasons exist for modulation：(1) in wired systems﹐coaxial lines exhibit superior shielding at higher frequencies﹔(2) in wireless systems﹐the antenna size should be a significant fraction of the wavelength to achieve a reasonable gain﹔(3) in most cases﹐the communication must occur in a certain part of the spectrum because of FCC regulations﹔and (4) in some applications﹐modulation allows simpler detection at the receive end in the presence of nonidealities in the communication channel﹒The techniques of modulation used in the analog communication systems contains AM﹐FM﹐PM﹒The techniques of modulation in digital communication systems contains ASK﹐FSK﹐PSK﹐QAM﹒This thesis proposes the use of IIR Oscillator to implement the FSK modulation and demodulation system﹒The function of modulation can be achieved by the IIR Oscillator﹒And the function of demodulation can be achieved by AOSC-LMS algorithm﹐which is derived according to the working principle of the IIR Oscillator associated with an IIR BPF﹒So we can combine the modulation and the demodulation subsystems form a unified system﹒We will also use digital signal processor (TI TMS320C6711 DSK) to implement this FSK modulation and demodulation system﹒
Keywords：FSK-FH modulation、IIR Oscillator、Adaptive Filter、 Frequency Detection、Bluetooth
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