在载波频率已恢复的情况下给出了IQ正交分量的解调算法。
The demodulation algorithm for IQ components is given under condition that the carrier is recovered.
在对经典载波恢复算法仿真和分析的基础上，采用扫频和DD算法相结合作为全数字解调的载波恢复算法。
Based on the simulation and analysis of classical algorithms, a carrier recovery algorithm which is combination of swept and DD algorithm is adopted in all-digital demodulator.
传统的数字信号解调方法存在着载波恢复、符号同步等问题，实现起来较为复杂。
The traditional digital signal demodulation method that realizes more complex has the problems of carrier recovery, symbol synchronization and so on.
最后，通过对误码性能和系统联合锁定时间进行仿真，验证了数字解调器性能，并在FPGA中实现了载波恢复模块。
Finally, the performances of this digital demodulator are tested through the simulation of BER and the system joint lock-time, and a carrier recovery module is implemented in FPGA.
第五章中给出了对各种调制方式的解调模型，成功建立了平方环载波恢复模型。
In chapter 5, demodulation models of many modulation systems are established. Square loop model is established to detect carrier.
接收机对信号进行载波恢复并解调，通过时序恢复后进行解码。
In the receiver, the received signal is demodulated after carrier recovery. And the demodulated signal is decoded after timing recovery.
接收机对信号进行载波恢复并解调，通过时序恢复后进行解码。
In the receiver, the received signal is demodulated after carrier recovery. And the demodulated signal is decoded after timing recovery.
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