Frequency allocation method and transmission apparatus for performing the method
First Claim
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1. A frequency allocation method performed by a transmission apparatus, the frequency allocation method comprising:
- modulating a data signal to be transmitted to a reception apparatus into single or multi-channel baseband modulation signals;
generating respective intermediate frequency (IF) carriers corresponding to the modulation signals;
combining the IF carriers based on a bandwidth of each of the IF carriers and a center frequency spacing between the IF carriers; and
transmitting the combined IF carriers by assigning a center frequency of a first IF carrier of the combined IF carriers based on a total bandwidth of the combined IF carriers and a half of a bandwidth of the first IF carrier.
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Abstract
Provided is a frequency allocation method and a transmission apparatus for performing the method, the frequency allocation method may allocate a center frequency of a first intermediate frequency (IF) carrier of combined IF carriers at a position which is a predetermined interval apart based on direct current (DC) to avoid in view of a non-linear signal distortion component that is generated by an interaction between a chirp and a chromatic dispersion of a laser in a mobile fronthaul.
26 Citations
8 Claims
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1. A frequency allocation method performed by a transmission apparatus, the frequency allocation method comprising:
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modulating a data signal to be transmitted to a reception apparatus into single or multi-channel baseband modulation signals; generating respective intermediate frequency (IF) carriers corresponding to the modulation signals; combining the IF carriers based on a bandwidth of each of the IF carriers and a center frequency spacing between the IF carriers; and transmitting the combined IF carriers by assigning a center frequency of a first IF carrier of the combined IF carriers based on a total bandwidth of the combined IF carriers and a half of a bandwidth of the first IF carrier. - View Dependent Claims (2, 3, 4)
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5. A transmission apparatus, comprising:
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a signal modulator configured to modulate a data signal to be transmitted to a reception apparatus into single or multi-channel baseband modulation signals; a signal converter configured to convert combinations of the modulation signals and corresponding carrier signals into intermediate frequency (IF) carriers; a signal combiner configured to combine the IF carriers; and a signal transmitter configured to transmit the combined IF carriers using optical signals by assigning a center frequency of a first IF carrier of the combined IF carriers based on a total bandwidth of the combined IF carriers and a half of a bandwidth of the first IF carrier. - View Dependent Claims (6, 7, 8)
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Specification