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通信系统仿真,QPSK调制与解调,主要针对差分解调方式,对于matlab初学者以及做通信仿真的人员有很好的参考价值-communications system simulation, QPSK modulation and demodulation, the main differential demodulator, for beginners and Matlab done Communication Simulation of a very good reference value
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OFDM系统的信号调制仿真程序，包括差分的4dpsk和8dpsk，非差分的qpsk和8psk-Signal modulation OFDM system simulation program, including differential 4dpsk and 8dpsk, non-differential qpsk and 8psk
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此代码为π_4DQPSK解调源程序，用MATLAB实现,使用差分方式。-This demodulation π_4DQPSK source code using MATLAB to achieve, the use of differential mode.
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DIGITAL MODULATION TECHNIQUES
the material describes digital modulation techniques such as BINARY PHASE SHIFT KEYING (BPSK), DIFFERENTIAL PSK (DPSK), DIFFERENTIALLY-ENCODED PSK (DEPSK), QUADRATURE PSK (QPSK), QUADRATURE AMPLITUDE SHIFT KEYING (Q-AS
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2发2收，BPSK、QPSK、16QAM等多种调制方式下的差分空时编解码程序，仿真结果正确。-Two transmit antenna, two receiving antennas, a variety of modulation mode differential space encoding and decoding process, simulation results are correct.
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Phase shift keying (PSK) is a large class of digital modulation schemes. PSK is
widely used in the communication industry. In this chapter we study each PSK modulation
scheme in a single section where signal descr iption, power spectral density,
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The phase of the output signal gets shifted depending upon the input. These are mainly of two types, namely Binary Phase Shift Keying (BPSK) and Quadrature Phase Shift Keying (QPSK), according to the number of phase shifts. The other one is Different
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