The invention discloses a co-spectrum transmission modulation and
demodulation device for scatter communication and relates to co-spectrum transmission modulation and
demodulation devices in the field of scatter communications, wherein according to the co-spectrum transmission modulation and
demodulation devices, spectrum resources and transmitting power are limited, and the demodulation threshold is low. The co-spectrum transmission modulation and demodulation device is composed of an auxiliary
multiplexing / de-
multiplexing device, a co-spectrum transmission modulator, a D / A converter, a local-oscillation module, an IQ modulator, a band-pass filter, an
amplifier, a co-spectrum receiving low-threshold demodulator, an A / D converter, an intermediate-frequency
amplifier and other components. By the adoption of the co-spectrum
transmission technology on the basis of merging
time domain diversity and self-adapting co-spectrum receiving, the spectrum resources occupied by a high-capacity scatter communication
system are greatly reduced, and meanwhile high-quality service transmission can be achieved. The co-spectrum transmission modulation and demodulation device for the scatter communication has high-efficiency
forward error correction coding and decoding functions, can guarantee the low receiving threshold of equipment and is especially applicable to high-quality and high-
throughput service transmission on a beyond-visual-range radio
communication link under the condition that the spectrum resources and power are limited.