现代通信传输技术详解：MSK、GMSK、OFDM、伪随机序列、扩展频谱技术

第8章讲述了现代通信传输技术，包括键控(MSK)、高斯MSK(GMSK)、正交频分复用(OFDM)、伪随机序列以及扩展频谱技术。在连续相位FSK(CPFSK)中，M进制的PAM基带信号可以表示为nsnTtgatm)( )}1(,3,1{，其中Man是信息符号，tg是宽度为sT的矩形脉冲。连续相位FSK可以表述为0)(42cos)(tsdcdmTftfAts，在时刻snTt处是不连续的，但是积分是连续的，即tddmTfat)(4)。在时间区间])1(,[ssTkkT中，附加相位为)(2)(42),(1skkkdsskjisdkTtq。Modern communication transmission technology is discussed in Chapter 8, including minimum shift keying (MSK), Gaussian minimum shift keying (GMSK), orthogonal frequency division multiplexing (OFDM), pseudo-random sequences, and spread spectrum technology. In continuous phase shift keying (CPFSK), a M-ary PAM baseband signal can be represented as nsnnTtgatm)( )}1(,3,1{, where Man is the information symbol and tg is the rectangle pulse with width sT. Continuous phase shift keying can be expressed as 0)(42cos)(tsdcdmTftfAts, which is discontinuous at time snTt but the integral is continuous, namely tddmTfat)(4).In the time interval ])1(,[ssTkkT, the additional phase is )(2)(42),(1skkkdsskjisdkTtq.