As a result, the computer simulations show that the LPI capability of the new DSSS modulation become more effective within the same bandwidth and Spread Spectrum gain.
计算机仿真结果表明，在调制带宽或扩频增益不变的前提下，提高了DSSS调制信号的低概率截获性能。
Aiming at the spectrum spread problem of traditional digital modulation signals, a time-phase modulation (TPM) method with abrupt phase change characteristic is proposed.
针对传统数字调制信号频谱扩展问题，提出具有相位突变特性的时相调制(TPM)方式。
Merits of the Linear FM are that it is not necessary to have an equalizer or the spread spectrum code modulation.
线性调频调制的优点是：不须在接收端添加均衡滤波器，也不须进行扩频编码。
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