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AssigneeZte Corporation
InventorsLiguang LI, Jun XU, Jin XU
Estimating the term…
Disclosed are a data packet processing method and apparatus in an OFDMA system, and a storage medium. The method includes: performing code block segmentation on a source data packet to obtain d data blocks; respectively adding a CRC sequence to the d data blocks; respectively performing error correction coding; grouping the d data blocks on which the error correction coding is performed to obtain a information data packets; performing packet coding on the a information data packets to obtain b check data packets; performing constellation mapping modulation to obtain a first modulation symbol sequence with a length of k1 corresponding to the a information data packets and a second modulation symbol sequence with a length of k2 corresponding to the b check data packets; mapping the first and the second modulation symbol sequences to Mofdm1 continuous OFDM symbols and Mofdm2 continuous OFDM symbols according to time orders respectively for sending.
A data packet processing method in an Orthogonal Frequency Division Multiple Access, OFDMA, system, applied to a sending end, comprising:
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A data packet processing apparatus in an Orthogonal Frequency Division Multiple Access, OFDMA, system, applied to a sending end, comprising:
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A data packet processing apparatus in an Orthogonal Frequency Division Multiple Access, OFDMA, system, applied to a receiving end, comprising:
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Dependencies are inferred from the claim text.
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Multicarrier modulation systems: signal structure
Arrangements for detecting or preventing errors in the information received: by using forward error control
By using forward error control: arrangements at the transmitter end
Systems characterized by the type of code used: error detection codes
Term end not estimated
The present invention relates to a data packet transmission technology in an Orthogonal Frequency Division Multiple Access (OFDMA) system, in particular to a data packet processing method and apparatus in an OFDMA system, and a storage medium.
The OFDMA technology is one of key technologies in a fourth generation mobile communication Long Term Evolution (LTE) system and can combine with a space-time coding technology, inter-symbol interference and inter-channel interference suppression technologies and a smart antenna technology to improve system performance to an utmost extent and improve communication throughput. In the fourth generation mobile communication LTE system, a multicarrier OFDMA technology is used in downlink communication, and a Single-Carrier Frequency Division Multiple Access (SC-FDMA) technology is used in uplink communication.
All subcarriers in OFDMA are orthogonal to each other, each subcarrier has an integral number of carrier periods in time of one symbol, a spectrum null of each carrier is overlapped with a spectrum null of an adjacent carrier, and thereby there is no interference between subcarriers. In addition, since carriers are partially overlapped, the spectrum utilization rate is greatly improved. Cyclic prefixes are filled into OFDMA symbol guard intervals to guarantee that the number of waveform periods contained in a delay copy of OFDMA symbols in a Fast Fourier Transform (FFT) period is also an integer. Thereby, signals whose delays are smaller than guard intervals would not produce Inter-symbol interference (ISI) and Inter-channel interference (ICI) in a demodulation process. In addition, a main advantage of the OFDMA system is that orthogonal subcarriers can realize modulation and demodulation by using Fast Fourier Transform (FFT/IFFT), thereby computation complexity can be obviously decreased and hardware realization is simple.
FIG. 1 illustrates a schematic diagram of access of an OFDMA system according to an embodiment of the present invention.
FIG. 2 illustrates a schematic diagram of frequency dimension and time dimension in an OFDMA system according to an embodiment of the present invention.
FIG. 3 illustrates a flowchart of a data packet processing method in an OFDMA system according to embodiment one of the present invention.
In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described below in detail in combination with the embodiments and with reference to the drawings.
It needs to be stated that embodiments of the present invention and all features in the embodiments may be mutually combined within the protection scope of the present invention under a situation of no conflict. Besides, although logical sequences are illustrated in the flowcharts, the illustrated or described steps may be executed according to sequences different from the sequences here under certain circumstances.
FIG. 3 illustrates a flowchart of a data packet processing method in an OFDMA system according to embodiment one of the present invention. As illustrated in FIG. 3, the data packet processing method in the OFDMA system according to the embodiment of the present invention includes steps 300-309.