Scaling apparatus set in a receiver
A receiver and scaling technology, applied in the directions of amplification control, modulation carrier system, transmission system, etc., can solve the problem of unable to adjust the signal amplitude to a suitable range, and achieve the effect of stable quality
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[0014] see figure 1 , figure 1 Shown is a schematic diagram of the scaling device provided in the receiver in the first embodiment of the present invention. In this embodiment, the receiver is an OFDM receiver that adopts a Decimation in Frequency (DIF) Fast Fourier Transform (FFT) mechanism. The OFDM receiver includes a filter 110 , a digital automatic gain control (digital AGC) unit 120 , a fast Fourier transform unit 130 , a bit-reversal (bit-reversal) unit 140 , and a scaling device 150 . Wherein the fast Fourier transform unit 130 generates a disordered frequency domain symbol (disorderly symbol) with a plurality of sub-carriers (sub-carrier) according to the time domain symbol (domain symbol) received from the digital automatic gain control unit 120, namely , the subcarriers of the output unordered frequency domain symbols are not sequentially arranged according to the frequencies of consecutive subcarriers. For each out-of-order symbol, the bit inversion unit 140 is ...
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