OFDM communication system and method based on companding
A companding, communication system technology, applied in transmission systems, multi-frequency code systems, digital transmission systems, etc., can solve problems such as constellation diffusion, reduce bit error rate, improve system reliability, and reduce constellation diffusion problems. Effect
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[0016] The present invention provides an OFDM communication system based on compression and expansion, including: a wired or wireless communication channel, a transmitting device, and a receiving device. The transmitting device includes a compression conversion module that suppresses the peak-to-average ratio of the OFDM signal. The transmitting device transmits a signal to the receiving device. ; The receiving device restores the signal of the sending end according to the received signal.
[0017] The receiving device includes a first FFT unit, a channel equalization unit, an IFFT unit, an extended transform unit, a second FFT unit, a parallel-serial conversion unit and a decoding unit; the first FFT unit performs processing on the signal received by the receiving device For the first FFT transformation, the channel equalization unit performs channel equalization processing on the frequency domain signal after passing the first FFT unit; the IFFT unit performs IFFT conversion on ...
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