Apparatus for receiving a signal of orthogonal frequency division multiplexing
A technology for receiving signals and signals, used in multiplexing communication, code division multiplexing systems, image communication and other directions, it can solve problems such as data interval distortion, and achieve the effect of preventing distortion and improving performance.
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[0024] Hereinafter, preferred embodiments of the present invention will be described in detail, and examples of these preferred embodiments are illustrated in the accompanying drawings.
[0025] Fig. 1 is a block diagram illustrating a DMB-T transmitter. The DMB-T transmitter will be described below with reference to FIG. 1.
[0026] Referring to FIG. 1, the channel encoder 10 outputs a channel-encoded bit stream in order to detect errors in the receiver.
[0027] The modulator 20 receives the encoded bit stream, and modulates the received bit stream according to a 4-ary, 16-ary, or 64-ary quadrature amplitude modulation (QAM) scheme or the like.
[0028] The inverse discrete Fourier transform (IDFT) unit 30 modulates the frequency domain OFDM modulated signal into a time domain OFDM signal. Generally, the DMB-T scheme converts frequency domain signals associated with 3780 point transmission data into time domain signals.
[0029] The pseudo noise (PN) generator 40 generates a PN ...
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