Digital signal transmitting method and equipment based on modulated carriers of equal amplitude and equal period
A digital signal, periodic modulation technology, applied in digital transmission system, modulated carrier system, modulation and other directions, can solve the problems of large amplitude, limited bandwidth efficiency, affecting demodulation performance, etc., to achieve the effect of good compression and enhanced discrimination
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[0043] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0044] Figure 4 It is a structural block diagram of a digital signal transmission transmitter based on constant-amplitude and equal-period modulation carrier waves of the present invention, including a synchronous clock, two waveform memories, a two-to-one selector, a digital-to-analog converter, an up-conversion module, a transmission filter, and a power amplifier and transmitting antenna. The characterization information obtained by sampling in one cycle is "0" f 0 (t) and f of "1" 1 (t) The waveform samples of the two basic waveforms are respectively stored in two memories; the digital signal to be sent controls the two-to-one selector, and within one waveform period, whether the digital signal to be sent is "0" or " 1" to select f 0 (t) or f 1 One corresponding memory in (t); under the control of the synchronous clock, the waveform sample in the mem...
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