SC-IFDMA (single carrier-interleaved frequency division multiple access) communication method based on SIM (subscriber identity module) modulation

A technology of SC-IFDMA and communication method, which is applied in interleaved subcarrier index modulation and related time domain detection technology, single carrier interleaved frequency division multiple access communication field, can solve problems such as bit errors, achieve system performance improvement, and enhance BER performance effect

Inactive Publication Date: 2014-03-12
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

[0004] In mobile communication, the deep fading of the channel often lasts for a period of time, resulti

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  • SC-IFDMA (single carrier-interleaved frequency division multiple access) communication method based on SIM (subscriber identity module) modulation
  • SC-IFDMA (single carrier-interleaved frequency division multiple access) communication method based on SIM (subscriber identity module) modulation
  • SC-IFDMA (single carrier-interleaved frequency division multiple access) communication method based on SIM (subscriber identity module) modulation

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[0026] A SC-IFDMA communication method based on SIM modulation. Its main innovation is the introduction of interleaving and SIM modulation on the basis of the SC-IFDMA system, which combines the advantages of these two technologies while retaining the characteristics and advantages of the system itself. , The system performance has been greatly improved.

[0027] 1. A SC-IFDMA communication method based on SIM modulation, including the following steps:

[0028] Step 1: Generate (M / 2)*(Mod+1) information bits from the digital source, and then perform serial-to-parallel conversion on the (M / 2)*(Mod+1) information bits generated by the digital source; Among the M / 2)*(Mod+1) information bits, the first M / 2 bits are used for SIM modulation index bits, and the last (M / 2)*Mod bits are used for MQAM modulation, where the modulation order Mod=1, 2, 4, and 6 respectively represent BPSK modulation, QPSK modulation, 16QAM modulation and 64QAM modulation, and M is the number of FFT points at t...

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Abstract

The invention relates to an SC-IFDMA (single carrier-interleaved frequency division multiple access) communication method based on SIM (subscriber identity module) modulation and belongs to the technical field of anti-jamming. The thoughts of SIMOFDM (SIM orthogonal frequency division multiplexing) is used for reference to introduce SIM modulation to SC-IFDMA. Different time slot bearing data is selected at the transmitting end of an SC-IFDMA link according to SIM modulation index bits, and the SIM modulation signals are detected at the receiving end with a special detecting method. The SIM modulation introduces new power distribution strategies to increase BER (bit error rate) performance of a system. If further interweaving is performed after SIM modulation to reduce the probability that the adjacent time slots are subjected to the same deep fading, and the BER performance of the system can be further increased. In addition, introducing of time domain interweaving and the SIM modulation does not affect the low PAPR (peak to average power ratio) performance of the SC-IFDMA system.

Description

technical field [0001] The invention belongs to the technical field of communication, and relates to a single carrier interleaved frequency division multiple access (Single Carrier Interleaved Frequency Division Multiple Access, SC-IFDMA) communication method, an interleaved subcarrier index modulation (Interleaved Subcarrier Index Modulation, ISIM) and related time domain detection technology. Background technique [0002] Single Carrier Frequency Division Multiple Access (SC-FDMA) is adopted by 3GPP as an uplink multiple access technology of LTE. By doing discrete Fourier transform (DFT) preprocessing at the sending end, this technology not only has similar performance to OFDM systems, but also has lower PAPR (Peak-to-Average Power Ratio). According to different subcarrier placement methods, the system can be divided into interleaved frequency division multiple access (IFDMA) and localized frequency division multiple access (LFDMA). IFDMA can provide higher frequency doma...

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Application Information

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IPC IPC(8): H04L27/26
Inventor 肖悦冯树苓徐斌但黎琳李少谦
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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