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TFM是一种相关相移键控信号。其频带利用率较高,适用于移动通信、卫星通信等对信号频带限制较严的通信系统。TFM与MSK的相位网格图相似,有内在联系。计算机模拟结果表明,在信道非线性的作用下TFM的带外辐射仍低于MSK而误码性能略有损失。本文提出了TFM的一种改型=BTFM,其误码性能优于TFM而接近MSK。
TFM is a related phase shift keying signal. Its high frequency band utilization, suitable for mobile communications, satellite communications and other signal bands more stringent restrictions on the communication system. The phase diagram of the TFM and MSK are similar and have an internal connection. Computer simulation results show that the out-of-band TFM emission is still below MSK with a slight loss of bit error performance. This paper presents a modification of TFM = BTFM, whose error performance is better than TFM and close to MSK.